297-1001-131 DMS-100 Family DMS-100 Ringing System General Description BASE15 and up Standard 06.
DMS-100 Family DMS-100 Ringing System General Description Publication number: 297-1001-131 Product release: BASE15 and up Document release: Standard 06.01 Date: October 2000 Copyright © 1990, 1991, 1993, 1994, 1995, 1996, 1998, 1999, 2000 Nortel Networks, All Rights Reserved NORTEL NETWORKS CONFIDENTIAL: The information contained herein is the property of Nortel Networks and is strictly confidential.
iii Publication history October 2000 BASE15 Standard 06.01 • Added Universal Edge 9000 (UEN) ringing information. March 2000 BASE14 Standard 05.01 • Added United Kingdom ringing configuration changes September 1999 BASE12 Standard 04.04 • added a ringing generator configuration change procedure for single line concentrating module configurations August 1999 BASE12 Standard 04.
iv July 1998 BASE08 Standard 04.02 • added description of United Kingdom ringing and a limit on Distinctive Ringing Enhancements August 1997 BASE08 Standard 04.01 • added C3C distinctive ringing pattern information for Malaysia and Australia from feature AR2137 • updated description of revertive ringing, noting that revertive ringing is not supported for FSR lines August 1996 BCS36 Standard 03.05 incorporated editorial changes August 1995 BCS36 Standard 03.
v October 1993 BCS36 Preliminary 03.01 • rearranged chapters • incorporated technical and editorial changes • updated section on LCMs in chapter 3. March 1991 BCS32 Standard 02.01 • included streamline information • converted document to new format September 1990 BCS31 Standard 01.07 • added NT2X27AE ringing generator interface (RGI) to the list of RGIs in the Line Module/Remote Line Module description.
vii Contents About this document xi When to use this document xi How to check the version and issue of this document xi References in this document xi What precautionary messages mean xii How commands, parameters, and responses are represented Input prompt (>) xiii Commands and fixed parameters xiii Variables xiii Responses xiv 1 DMS-100 ringing overview xiii 1-1 Introduction 1-1 Normal and immediate ringing 1-2 ANI and coin functions 1-5 Types of ringing 1-5 Frequency selective ringing 1-5 Superimp
viii Contents Ringing generator capacity 2-8 Ringing generator takeover and take back 2-9 LM and RLM ringing generator parameters 2-9 3 Ringing in Series II peripherals 3-1 Ringing in the subscriber carrier module 3-1 SCM-100U 3-1 SCM-100U/RCU ringing configuration 3-2 Ringing hardware 3-3 SCM-100R 3-5 SCM-100R/RCT ringing configuration 3-5 Ringing hardware 3-7 SCM-100R ringing hardware 3-7 RCT ringing hardware 3-8 Ringing generator capacity 3-9 Ringing generator takeover 3-9 SCM-100S 3-9 Ringing types
Contents ix Assigning ringing to line concentrating modules 4-3 Setting up the LCM or RLCM ringing generators Line cards 4-4 Table LCMINV 4-4 Assigning ringing to SCM-100R 4-4 Ringing generators 4-4 Line cards 4-5 Table RCTINV 4-5 Assigning ringing to SCM-100S 4-5 Ringing generators and line cards 4-5 Table RCSINV 4-5 Assigning ringing to SCM-100U 4-6 Ringing generator 4-6 Line cards 4-6 Table RCUINV 4-6 Assigning ringing to the OPM 4-6 Assigning ringing to the RSC 4-6 Assigning ringing to lines 4-6 Setting
xi About this document When to use this document This document describes the DMS-100 ringing system. It is intended as a general reference for operating company personnel responsible for engineering, administration, and maintenance of the DMS-100 ringing system. How to check the version and issue of this document The version and issue of the document are indicated by numbers, for example, 01.01. The first two digits indicate the version.
xii • DMS-100 Provisioning Manual, 297-1001-450 • Peripheral Modules Maintenance Guide, 297-1001-592 • SMS Maintenance Manual, 297-8231-550 • SMU Maintenance Manual, 297-8241-550 • Hardware Description Manual, 297-8991-805 • DMS-1 Urban System Description, 363-2051-100 • DMS-1 Urban Circuit Pack Description, 363-2051-101 • SERVORD Reference Manual • Office Parameters Reference Manual • Log Report Reference Manual • Translations Guide • Card Replacement Procedures • Customer Data Sc
xiii WARNING Possibility of equipment damage DANGER Damage to the backplane connector pins Align the card before seating it, to avoid bending the backplane connector pins. Use light thumb pressure to align the card with the connectors. Next, use the levers on the card to seat the card into the connectors. CAUTION Possibility of service interruption or degradation CAUTION Possible loss of service Before continuing, confirm that you are removing the card from the inactive unit of the peripheral module.
xiv Responses Responses correspond to the MAP display and are shown in a different type: FP 3 Busy CTRL 0: Command request has been submitted. FP 3 Busy CTRL 0: Command passed. The following excerpt from a procedure shows the command syntax used in this document: 1 Manually busy the CTRL on the inactive plane by typing >BSY CTRL ctrl_no and pressing the Enter key. where ctrl_no is the number of the CTRL (0 or 1) Example of a MAP response: FP 3 Busy CTRL 0: Command request has been submitted.
1-1 1 DMS-100 ringing overview Introduction The DMS-100 ringing system performs automatic number identification (ANI) and coin functions and supports the following three ringing systems used in North America: • Bell Canada • Bell operating company (BOC) • Rural Electrification Association (REA) The DMS-100 ringing signal is based on a 6-second (s) cycle. The cycle is divided into 12 time slots, which are the smallest divisions of the ringing cycle.
1-2 DMS-100 ringing overview Figure 1-1 Illustration of a DMS-100 ringing cycle LME ringing cycle Ringing cycle (6 s) Time slot (500 milliseconds[ms]) 0 1 2 3 4 5 6 7 8 7 8 9 10 11 10 11 LCE ringing cycle Ringing cycle (6 s) Time slot (500 ms) 0 1 2 3 Subcycle 0 4 5 6 Subcycle 1 SCM ringing cycle 9 Subcycle 2 Subcycle 3 Ringing cycle (6 s) Time slot (500 ms) 0 1 2 3 Phase 1 4 5 6 Phase 2 7 8 9 10 11 Phase 3 Note: The time slot duration for LCE ringing varies wit
DMS-100 ringing overview 1-3 applies power ringing at the start of the next available ringing cycle. If power ringing can not be applied during the first time slot of a ringing cycle, the DMS-100 switch will try to schedule power ringing during the first time slot of the next ringing cycle. This can cause delays in power ringing of up to 6 s in LCMs and up to 8 s in line modules (LM). To reduce these delays, an immediate ringing mode is available.
1-4 DMS-100 ringing overview Figure 1-2 Normal versus immediate ringing on 1FR line Ringing request received Ringing cycle 1 Ringing applied Ringing cycle 2 Ringing applied 0 1 2 3 4 5 6 7 8 9 10 11 0 1 2 3 4 5 6 7 8 9 1011 Normal Time slot 0 available. Apply Time slot 0 not available. ringing power ringing at Time slot 0. Try cycle 2. (immediate ringing 0 1 2 3 4 5 6 7 8 9 10 11 0 1 2 3 4 5 6 7 8 9 1011 disabled) 6-s delay Apply power ringing Time slot 0 not available. Try time slot 1.
DMS-100 ringing overview 1-5 For example, in the following figure, ringing is enabled on the LCE, the first ringing burst applies at the beginning of time slot 1 and continues to the end of time slot 4. The initial ringing burst is 2 s. ANI and coin functions The DMS-100 ringing bus also provides voltages for ANI and coin functions.
1-6 DMS-100 ringing overview The treatments for FSR revertive calls are defined in table TMTCNTL, subtable LNT, in the following tuples: • originator revertive multiparty frequency with three or more parties (ORMF) • originator revertive frequency with two parties (ORAF) • terminating party (TRRF) The following figure illustrates the sequence of events that occur when a revertive call is made on a multiparty, FSR line. Figure 1-3 Revertive call on multiparty, FSR line 1.
DMS-100 ringing overview 1-7 The frequencies used in the frequency selective ringing scheme are as follows: • harmonic ringing: 16-2/3 Hz, 25 Hz, 33-1/3 Hz, 50 Hz, 66-2/3 Hz • synchromonic ringing (20 Hz base): 20 Hz, 30 Hz, 42 Hz, 54 Hz, 66 Hz • synchromonic ringing (16 Hz base): 16-2/3 Hz, 30 Hz, 42 Hz, 54 Hz • decimonic ringing: 20 Hz, 30 Hz, 40 Hz, 50 Hz, 60 Hz. Frequency selective ringing is used by Rural Electrification Association (REA) offices.
1-8 DMS-100 ringing overview Harmonic ringing The following figure illustrates the relationship of the harmonic ringing signals with the ringing cycle. Figure 1-5 Harmonic ringing 6s 0 FrequencyA (1 party) 1 2 25 Hz 1.95 s (seenote) FrequencyB 3 4 5 6 7 8 10 11 33--1 -1/3 Hz 1.35 s 50 Hz 1.35 s FrequencyC 66 --2 -2/3 Hz 1.35 s FrequencyD ANI/coin 9 (Any available slot) 0 1 2 3 4 5 6 7 8 9 10 11 Note: Available frequencies are 16-2/3, 25, 33-1/3, 50, and 66-2/3 Hz.
DMS-100 ringing overview 1-9 Note: Available frequencies are 20 Hz, 30 Hz, 40 Hz, 50 Hz, and 60 Hz. Any four of these, in any order, can be assigned to frequencies A through D. Superimposed ringing Superimposed ringing is a form of selective ringing which uses a positive or negative biased 20 Hz ringing signal and polarizing devices, such as gas tubes, at the receiving end for full or semi-ringer selection.
1-10 DMS-100 ringing overview Revertive calls (calls from a subscriber on a multiparty line to another subscriber on the same party line) are permitted in the superimposed scheme. The calling party receives revertive ringing while the called party is being rung if the calling party is on the opposite side, tip or ring, of the called party, or the calling party is on the same side but with the opposite polarity of the called party.
DMS-100 ringing overview 1-11 Figure 1-8 Call on multiparty superimposed ringing line 1. Calling party (party 2) goes off-hook and dials called party (party 4). Tip +R Party 1 (see note 1) Party 2 --R Ring +R Party 3 --R Party 4 2. The called party (party 4) receives negative-biased ringing signal. +R Tip Party 1 Party 2 --R Ring +R Party 3 --R Party 4 3.
1-12 DMS-100 ringing overview The dc component of the superimposed ringing signal determines the ringer selection. The following table lists the values of both the ac and dc components of the superimposed ringing signals. Table 1-1 Superimposed ringing signal - ac and dc components> ac dc Frequency (Hz) 86 -38 20 86 +36 20 86 -52 20 86 +52 20 105 +52 20 105 -52 20 The following figures illustrate the relationship between the ringing signal and the DMS-100 ringing cycle.
DMS-100 ringing overview 1-13 Figure 1-10 LCE superimposed revertive ringing with immediate ring enabled 6s 0.48 s 0.46 s 0 1 2 3 4 0.92 s 5 6 7 8 9 10 11 5 6 7 8 9 10 11 Even LSGs 1, 2 party 3, 4 party Negativerevertive splash Positive revertive splash ANI/coin (Any available slot) 0 1 2 3 4 Figure 1-11 LCE superimposed revertive ringing with no immediate ring 6s 0.
1-14 DMS-100 ringing overview Figure 1-12 LCE superimposed revertive ringing with immediate ring enable 6s 0.5 s --48V 2FR code 1 0 1 2 3 4 5 6 7 8 9 10 11 0 1 2 3 4 5 6 7 8 9 10 11 +48V 2FR code 1 --48V multiparty code 2 +48V multiparty code 2 Revertive splash --48V Revertive splash +48V ANI/coin For the LCM of the LCE frame/cabinet with coded immediate ringing and the central control (CC) Patch TLA67, power ringing will be applied within 0.
DMS-100 ringing overview 1-15 Figure 1-13 LCE superimposed revertive ringing with immediate ring enable 6s 0.5 s 0 1 2 3 4 5 6 7 8 9 10 11 0 1 2 3 4 5 6 7 8 9 10 11 1FR (Ring pty) Note 1: CC Patch TLA67 does not allow the use of NT6X17 line cards for 2-party lines in the office. Note 2: ANI/coin will use any available slots. Coded ringing Coded ringing is used on multiparty lines to distinguish individual parties from other parties on the tip or ring side of the line.
1-16 DMS-100 ringing overview Figure 1-14 Ringing on multiparty coded ringing line Incoming call to party11 Tip Central office Party 1 Party 2 Party 3 Party 4 Party 5 Party 6 Party 7 Party 8 Party 1 Party 2 Party 3 Party 4 Party 5 Party 6 Party 7 Party 8 Ring 2s 1 ringing cycle = 6 s Incoming call to party77 Tip Central office Ring 1.5s 0.5s 1 ringing cycle = 6s Subscribers on multiparty lines can make calls to other subscribers on the same line by placing a revertive call.
DMS-100 ringing overview 1-17 OFCENG. Office parameter REVRING is described in Office Parameters Reference Manual. The following figure illustrates the sequence of events that occurs when a revertive call is made on a coded ringing, multiparty line. Figure 1-15 Revertive call on coded ringing multiparty line 1. Calling party (party 4) goes off-hook and dials called number (party 6). Tip Party 1 Party 2 Party 3 Party 4 Ring Dial pulses Party 5 Party 6 Party 7 Party 8 2.
1-18 DMS-100 ringing overview The following ringing codes are used in the coded ringing scheme: • ring party, 1R, 2FR • tip party, 2FR • multiparty, code 1 • multiparty, code 2 • multiparty, code 3 distinctive ring • multiparty, code 4 • multiparty, code 5 • revertive splash ring party • revertive splash tip party • ANI/coin • teen ringing, code 1 • teen ringing, code 2 • teen ringing, code 3 The ringing signal patterns for each type of coded ringing as they occur over the ringing
DMS-100 ringing overview 1-19 Figure 1-16 LME/LCE coded ringing patterns - immediate ring disabled 6s 2s 0 1 2 3 4 5 6 7 8 9 10 11 0 1 2 3 4 5 6 7 8 9 10 11 Ring party, 1R, 2FR Tip party, 2FR Multiparty, code 1 Multiparty, code 2 Multiparty, code 3 Distinctive ringing Multiparty, code 4 Multiparty, code 5 Rev splash ring party Rev splash tip party ANI/coin Teen ringing, code 1 Teen ringing, code 2 Teen ringing, code 3 DMS-100 Family DMS-100 Ringing System BASE15 and up
1-20 DMS-100 ringing overview Figure 1-17 LME/LCE coded ringing patterns with immediate ring enabled 6s 2s 0 1 2 3 4 5 6 7 8 9 10 11 0 1 2 3 4 5 6 7 8 9 10 11 Ring party, 1R, 2FR Tip party, 2FR Multiparty, code 1 Multiparty, code 2 Multiparty, code 3 Distinctive ringing Multiparty, code 4 Multiparty, code 5 Rev splash ring party Rev splash tip party ANI/coin Teen ringing, code 1 Teen ringing, code 2 Teen ringing, code 3 Distinctive ringing Distinctive ringing is used by Meridian Digit
DMS-100 ringing overview 1-21 Distinctive ringing is supported by the coded ringing, decimonic scheme at 20 Hz, and the REA frequency selective scheme at 30 Hz. The following figures illustrate the relationship between the distinctive ringing signals and the DMS-100 ringing cycle for the coded ringing and frequency selective ringing schemes. Figure 1-18 Distinctive ringing patterns - coded ringing scheme 6s 0.5 s 2s 2s 1.
1-22 DMS-100 ringing overview Figure 1-19 Distinctive ringing patterns - frequency selective scheme 6s 0.5 s 2s 2s 1.5 s 0 1 2 3 4 5 6 7 8 9 10 11 0 1 2 3 4 5 6 7 8 9 10 11 1 party, 1FR Code 3 Code 4 Code 5 ANI/coin Note: Coded 30 Hz ringing for LMEs does not support 2/4/8/10 multiparty or revertive ringing. Distinctive ringing (ringing type C3C) The ringing signal for markets that have adopted the C3C ringing type (such as Malaysia and Australia) is based on a 3 s cycle.
DMS-100 ringing overview 1-23 Figure 1-20 Distinctive ringing patterns for the C3C ringing type 3s 0.20 s 1s 1 Standard DRING1 for MBS sets 4 6 7 8 9 10 On Off 0.2 s 0.4 s 2.0 s On Off On Off 0.4 s 0.2 s 0.4 s 2.0 s 0.4 s DRING4 On Off On 0.8 s 0.2 s 0.2 s On 0.8 s Off 0.2 s 11 12 On 0.8 s Off 1.2 s Of f 0.6 s 2.4 s On Of f 0.8 s 0.2 s 0.2 s 0.2 s 0.4 s On Off On Off 0.2 s 0.2 s 0.4 s 0.2 s 0.2 s 0.2 s On On Off Off 1.2 s On Off 0.8 s 0.
1-24 DMS-100 ringing overview In the teen ringing configuration, a primary directory number (PDN) and up to three secondary directory numbers (SDN) are assigned to a subscriber's line. When the PDN is called, standard 1FR ringing is applied to the line (2-s ring, 4-s silence).
DMS-100 ringing overview 1-25 Figure 1-22 Teen ringing - coded ringing scheme 6s 0 PDN (1FR) 1 2 2s 3 1s 4 5 6 7 8 9 10 11 6 7 8 9 10 11 1s SDN 1 0.5 s 0.5 s 0.5 s 1s SDN 3 0 1s 0.5 s SDN 2 1 2 3 4 5 Figure 1-23 Teen ringing - frequency selective 30 Hz 6s 0 PDN (1FR) 1 2 2s 0.90 s 3 4 5 6 7 8 9 10 11 6 7 8 9 10 11 0.90 s SDN 1 0.45 s 0.45 s 0.90 s SDN 2 0.45 s 0.45 s 0.
1-26 DMS-100 ringing overview ringing and feature ringing. Note that some values of ON and OFF have a +/-0.0625 second range caused by hardware use in the LCM layer. The earlier C3D ring patterns change as a result of the conversion to the new time slot format. The following table describes the ring codes.
DMS-100 ringing overview 1-27 Figure 1-24 Ringing patterns 6s 0.25 s On Off On Off 1.0 s 2.0 s 1.0 s 2.0 s 0 1 2 Off On Off On Off 1.0 s 1.0 s 2.0 s 1.0 s 1.0 s On Off On Off On Off On Off 0.5 s 0.5 s 0.5 s 1.5 s 0.5 s 0.5 s 0.5 s 1.5 s 3 4 5 6 7 8 On Off On Off 1.5 s 0.5 s 1.5 s 2.5 s On Off On Off 1.5 s 0.5 s 0.5 s 3.5 s On Off On Off On 1.5 s 0.5 s 0.5 s 0.5 s 0.5 s On Off On Off On Off 1.5 s 0.5 s 0.5 s 0.5 s 1.0 s 2.
1-28 DMS-100 ringing overview Figure 1-25 Ringing patterns (cont'd) 6s 0.25 s 9 NOT USED 10 On Continuous 11 NOT USED 12 13 14 On Off On Off 1.0 s 0.5 s 1.0 s 3.5 s On Off On Off On Off 0.5 s 0.5 s 0.5 s 0.5 s 1.0 s 3.0 s On 0.5 s Off On Off On Off 0.5 s 1.0 s 0.5 s 0.5 s 3.0 s Note 1: Ring patterns 2 to 8 use a 6-s cycle provided by the NT6X60BA ringing generator. Ringing patterns 0 and 1 are repeated twice within the 6-s cycle.
DMS-100 ringing overview 1-29 United Kingdom ringing United Kingdom ringing is ring type C3C, based on a total cycle time of 3.0 s. Standard United Kingdom ringing is ring code 0, shown in the following table. Table 1-3 Standard United Kingdom Ringing Ring code ON OFF ON OFF 0 0.4 s 0.2 s 0.4 s 2.0 s There are only ten different ring codes used in United Kingdom ringing. All ten United Kingdom ringing patterns are described in the following figure.
1-30 DMS-100 ringing overview Figure 1-26 United Kingdom Ringing patterns 3s 0.2s 0 On On Off 0.4 s 0.4 s 2.0 s 1 2 3 On On 0.8 s 0.2 s On Off 0.8 s 0.8 s 1.0 s On Off 1.0 s 2.0 s On On On Off 0.8 s 0.2 s 0.4 s 1.0s On On On Off 0.4 s 0.2 s 0.4 s 1.0s On 0.2 s 7 On Off 0.4 s 2.6 s 12 13 14 1. 6s On 4 5 Off On Off 0.6s 0.4 s On Off 0.6 s 1.4s On On Off On Off 0.2s 0.2s 0.4s 0.6 s 1.4 s On On On Off 0.2s 0.6s 0.2s 1.
DMS-100 ringing overview 1-31 Figure 1-27 United Kingdom distinctive ringing patterns 3s 0.2s 1 On On Off 0.8 s 0.2 s 1.8 s On 2 On 0.7 s 3 4 5 6 7 8 Off 0.7 s 1.3 s On Off 0.9 s 2.1 s On On On Off 0.7 s 0.2 s 0.4 s 1.3 s On On 0.3 s 0.3 s On 0.2 s On Off 0.3 s 1.3s On On Off 0.3 s 0.3 s 2.1 s On On Off 0.2 s 0.3 s 2.2 s On On Off 0.3 s 0.3 s 2.
1-32 DMS-100 ringing overview Ringing characteristics The following tables provide a summary of DMS-100 switch ringing characteristics according to PM type. Table 1-4 Summary of ringing in peripheral modules (Sheet 1 of 2) PM type RG PEC Ring type supported Maximum lines ring LMC RLM NT2X27 20 Hz single party 15 lines (1FR). Hard coded. Depends on loop.
DMS-100 ringing overview 1-33 Table 1-4 Summary of ringing in peripheral modules (Sheet 2 of 2) PM type RG PEC Ring type supported Maximum lines ring UEN NTNP44 20 Hz single party 16 ADSL DMT Combo Line cards per shelf/ 4 loops each for a total of 64 loops in shelf. Coded NTNP50 20 Hz single party 16 POTS line cards per shelf/ 32 POTS loops for a total of 512 loops in shelf.
1-34 DMS-100 ringing overview Table 1-5 Ringing generator parameters - NT2X27 (Sheet 2 of 2) Ringing type RG PEC Frequency Voltage Maximum ring lines Synchromonic 16 NT2X27AD 20 Hz 87 V ac 15 16 Hz 105 V ac 15 30 Hz 110 V ac 9 42 Hz 115 V ac 6 54 Hz 125 V ac 4 66 Hz 125 V ac 3 20 Hz 87 V ac 15 20 Hz 105 V ac 12 30 Hz 110 V ac 9 42 Hz 115 V ac 6 54 Hz 125 V ac 4 66 Hz 125 V ac 3 20 Hz -52 V dc 15 20 Hz -40 V dc 15 20 Hz +40 V dc 15 Synchromonic Bell (105 V
DMS-100 ringing overview 1-35 Table 1-6 Ringing generator parameters - NT6X30 (Sheet 2 of 2) Ringing type RG PEC Frequency Voltage Maximum ring lines Harmonic NT6X30AA 20 Hz 87 V ac 24 16.67 Hz 105 V ac 8 25 Hz 110 V ac 33.33 Hz 115 V ac 50 Hz 125 V ac 66.
1-36 DMS-100 ringing overview The following table provides a summary of NT6X60 ringing generator parameters. Table 1-7 Ringing generator parameters - NT6X60 (Sheet 1 of 2) Ringing type RG PEC Frequency Voltage Maximum ring line Bell (86 V) NT6X60AA 20 Hz -52 V dc 24 - 28 20 Hz -40 V dc 24 - 28 20 Hz +40 V dc 24 - 28 20 Hz 87 V ac 24 20 Hz 105 V ac 8 30 Hz 110 V ac 40 Hz 115 V ac 50 Hz 125 V ac 60 Hz 125 V ac 20 Hz 87 V ac 24 16.67 Hz 105 V ac 8 25 Hz 110 V ac 33.
DMS-100 ringing overview 1-37 Table 1-7 Ringing generator parameters - NT6X60 (Sheet 2 of 2) Ringing type RG PEC Frequency Voltage Maximum ring line Synchromonic NT6X60AA 20 Hz 87 V ac 24 20 Hz 105 V ac 8 30 Hz 110 V ac 42 Hz 115 V ac 54 Hz 125 V ac 66 Hz 125 V ac 20 Hz -52 V dc 9 20 Hz -40 V dc 9 20 Hz +40 V dc 9 Bell (105 V) NT6X60AA Note: Maximum number of ringing lines is based on three ringers for each line and a short loop length.
1-38 DMS-100 ringing overview The following table provides a summary of ringing generator power specifications in the NTNP50 POTS 32 line card. Table 1-9 Ringing generator power specifications - NTNP50 Parameter Minimum Nominal Maximum Units Supply Voltage 36 48 75 V dc Supply Current 0.3 0.8 Amps The following table provides a summary of the compatibility of DMS-100 ringing types.
DMS-100 ringing overview 1-39 Provisioning ringing generators This section describes considerations that must be given to ringing when provisioning DMS-100 lines peripherals. You can find guidelines for provisioning lines peripheral modules by referring to the Provisioning Manual. When assigning lines to line peripherals, pay close attention to the number and type of lines assigned to each peripheral to prevent ringing generator overload conditions.
1-40 DMS-100 ringing overview Ringer Ring Tip Figure 1-28 Ringer configurations Bridged ringing Ringing voltage appears across tip and ring leads Ringer Tip ringing Ringing voltage appears across tip lead and earth ground Ringing voltage appears across ring lead and earth ground Tip Ring Ringer Ring ringing Bridged ringing In the bridged ringing configuration, the subscriber ringer is connected across tip and ring. The ringing signal is applied across tip and ring.
DMS-100 ringing overview 1-41 Audible ring back signal Audible ring back indicates to the calling party the called party is being rung. For all calls, the ring back signal is generated by the tone card in the peripheral unit hosting the calling party. The ring back signal in the DMS-100 switch operates on a 6-s cycle, which is similar to but independent of the ringing cycle. The ring back signal is close to, but not synchronized with, the DMS-100 switch ringing cycle.
1-42 DMS-100 ringing overview Figure 1-30 Timing of audible and power ringing signals - immediate ringing enabled 1 ringing cycle 2s 0 1 2 3 4 5 6 7 8 91011 0 1 2 3 4 5 6 7 8 9 1011 Power ring (LME coded and superimposed ringing or LCM coded ringing) Power ring starts Power ring (LCE superimposed ringing) Ring request Audible ring starts Audible ring 0 1 2 3 4 5 6 7 8 91011 0 1 2 3 4 5 6 7 8 9 1011 2s 1 audible ring back cycle Ringing in the UEN In the UEN, there is no external ringing generator.
2-1 2 Ringing in Series I peripherals Ringing types supported by LM and RLM As mentioned previously, Series I peripherals are nonconcentrating. This class of peripherals includes the line module (LM) and the remote line module (RLM). This part of this document describes the ringing system in the LM and RLM.
2-2 Ringing in Series I peripherals Figure 2-1 Series I peripheral ringing system architecture Bay 0 Signal processor RGI 0 RGI 1 RGI–0 RGI–1 Bay 1 Signal processor RGI 0 RGI–0 MUX LC 0 RGI 1 RGI–1 MUX LC 31 Line drawer 0–19 LC 0 LC 31 Line drawer 0–19 LM and RLM ringing hardware Ringing hardware for the LM and RLM is described next. Ring generator interface The NT2X27 RGI card interfaces the LM or RLM signal processor (SP) with ringing generators.
Ringing in Series I peripherals 2-3 • synchromonic MF - NT2X27AE • 20 Hz BOC coded ringing (105 V RMS) - NT2X27AF The RGI card also monitors ring generator output levels and reports any problems to the line module controller (LMC) through the signaling processor (SP). Line module power converter The ring generator is actually part of a LM/RLM power converter. The power converter supplies both a regulated +24V for use in the LM/RLM shelf and a programmable ac/dc voltage.
2-4 Ringing in Series I peripherals LM and RLM processors associated with ringing The following LM/RLM processors are associated with ringing: • master processor • CC message processor • signal processor The following figure illustrates a simplified block diagram of the relationship of these processors with the ringing function of the LM and RLM.
Ringing in Series I peripherals 2-5 Master processor The LM and RLM master processor is the main processor. It contains the software that performs the tasks requested by the DMS-100 CC. Under the direction of the DMS-100 CC, the master processor directs the activities of the subordinate processors in the LM and RLM. Signal processor The signal processor interfaces the master processor with the control units on the line side of the LM or RLM, including the ringing generator interface.
2-6 Ringing in Series I peripherals maintained as long as the signal processor and RGI in each bay operate properly. Ringing takeover If a fault occurred in the signal processor or RGI in either bay, the mate bay would take over the ringing control function in both bays. If a fault occurred in the RGI of bay 1, for example, the LM or RLM would report the fault to the DMS-100 CC. The CC would then send a takeover command to the LM or RLM controller.
Ringing in Series I peripherals 2-7 Figure 2-4 Takeover configurations in LM/RLM State 2 Bay 0 takes over Bay 1. RG 1 (Bay 1) is in-service Bay 0 SP RGI 0 RGI 1 RGI card Bay–0 RG 0 in-service RG 0 not in use To R–MUX in LD0 – LD18 (19) SP Bay 1 RGI RGI 0 1 RGI card NOT IN USE Bay-1 RG 0 not in use RG 1 in-service To R–MUX in LD0 – LD18 (19) State 3 Bay 0 takes over Bay 1.
2-8 Ringing in Series I peripherals If operating company personnel repair the RGI fault and return the unit to service, the DMS-100 CC, upon seeing that the RGI is now in-service, issues a take back command to the LM or RLM controller. In response, the LM or RLM controller disconnects the bay 0 RGI link to the bay 1 ringing generator over the crossover link and reconnects it to the other ringing generator in its own bay. It then reconnects the RGI links in bay 1 to the ringing generators in bay 1.
Ringing in Series I peripherals 2-9 Ringing generator takeover and take back Both ringing generators in each bay provide ringing signals for the lines in the LM or RLM bay. The signal processor and RGI program the ringing generators and, through the ring multiplexer, connect each ringing generator output to the appropriate line. If either ring generator fails, the SP/RGI restricts ringing to the alternate RG. The ringing system can still function in this configuration.
3-1 3 Ringing in Series II peripherals Ringing in the subscriber carrier module This chapter describes the ringing systems in DMS-100 peripherals belonging to the subscriber carrier module (SCM) and the line concentrating module (LCM) families. The SCM is a family of lines peripherals that provides a digital interface between the DMS-100 and the subscriber loop concentrator of the subscriber carrier system.
3-2 Ringing in Series II peripherals The SCM-100U was introduced into the DMS-100 by feature package NTX387. You can find documentation on the SCM-100U by referring to the SMU Maintenance Manual Ringing types supported by SCM-100U The SCM-100/RCU system supports the following types of ringing: • 2-second ring, 4-second silence for single party • 2-second ring, 4-second silence for multiparty • coded ringing for multiparty • revertive ringing for multiparty.
Ringing in Series II peripherals 3-3 Ringing hardware The SCM-100U/RCU ringing system involves the hardware components listed in the following table. Table 3-1 SCM-100U ringing hardware Peripheral Component PEC Component Name SCM-100U NTMX77 Unified processor NT6X80 Ring/pad NT6X85 DS-1 interface NT3A86 DS-1 interface NT3A31 Control processor NT3042 Timing NT3A39 Ringing generator RCU Note: Line card controllers and line cards are also part of the ringing hardware in the RCU.
3-4 Ringing in Series II peripherals RCU components associated with ringing A detailed functional description of the circuit cards in the RCU is in DMS-1 Urban Circuit Pack Descriptions. A very brief description of the RCU components associated with ringing is in the following table. Table 3-3 RCU ringing hardware component description Component Description NT3A68 DS-1 interface. The DS-1 interface card converts the serial data from the DS-1 links to parallel data for use by the RCU controller.
Ringing in Series II peripherals 3-5 In the event that the monitor circuit detects a fault, the monitor and alarm circuit raises a ringing generator alarm and operates the switchover relays to switch the standby ringing generator to the active ringing generator. The monitor and alarm circuit then activates a shut-down circuit in the faulty ringing generator, which disconnects the faulty generator from the power source and lights the shut-down light-emitting diode (LED) on the ringing generator faceplate.
3-6 Ringing in Series II peripherals Figure 3-2 SCM-100R/RCT ringing configuration SCM-100R Ring/pad Master processor DS1 Protection link A B DS1 RCT Protection link A B Protection switch Digroup A/B Digroup A/B Ring distribution QPP422 Line shelf Lines RCT control Ring distribution QPP422 300 V converter QPP430 Generator QPP426 Generator QPP426 297-1001-131 Standard 06.
Ringing in Series II peripherals 3-7 Ringing hardware The SCM-100R/RCT hardware is listed in the following table.
3-8 Ringing in Series II peripherals Table 3-5 SCM-100R ringing hardware component description (Sheet 2 of 2) Component Description NT6X80 Ring/pad. The ring/pad circuit card provides PCM samples of ringing signals. The control complex, upon determining the type of ringing required for a given line, accesses the sample PCM signal from the ring/pad card memory. NT6X85 DS-1 Interface.
Ringing in Series II peripherals 3-9 Ringing generator capacity Following are the capacities for the RCT ringing generators. • QPP426—20 ringers/5 lines at a time • QPP435—21 ringers/5 lines at a time • QPP430—20 ringers/5 lines at a time Ringing generator takeover The RCT can be provisioned with backup ringing generators and power converters. In the backup configuration, the backup unit takes over if the primary unit fails.
3-10 Ringing in Series II peripherals Figure 3-3 SCM-100S/RCS ringing configuration SCM-100S Master processor RCS Lines DS-1 A B Protection link Ring/pad SCM-100S ringing hardware The SCM-100S/RCS hardware is listed in the following table. Table 3-7 SCM-100R/RCT ringing hardware Peripheral PEC Name SCM-100S NT6X45 Master processor NT6X80 Ring/pad NT6X50 DS-1 interface 297-1001-131 Standard 06.
Ringing in Series II peripherals 3-11 The following table contains brief functional descriptions of the ringing hardware associated with the SCM-100S/RCS ringing. A detailed description of the SCM-100S hardware can be found in the SMS Maintenance Manual Table 3-8 SCM-100R ringing hardware component description Component Description NT6X45 Control complex. The SCM-100S control complex coordinates call processing between the RCS and the DMS-100.
3-12 Ringing in Series II peripherals Also on each shelf is a control complex made up of a power converter, processor, and digroup control card; the term unit is used to describe this control complex. When both units are in-service, unit 0 supports the even-numbered logical drawers in the LCM. Unit 1 supports the odd-numbered logical drawers. The LCM ringing operation is provided by two ringing generators, RG 0 and RG 1, located at the top of the LCE frame shown in Figure 3-4, "LCE frame" on page 3-13.
Ringing in Series II peripherals 3-13 Figure 3-4 LCE frame Ringing generator0 NT6X30 Ringing generator1 NT6X30 Unit 1 –48V RA RB FSP Power converter Baffle Fuses RA and RB +5V +15V Drwr 11 Drwr 13 Drwr 15 Drwr 17 Drwr 19 Drwr 10 Drwr 12 Drwr 14 Drwr 16 Drwr 18 Shelf 55 Shelf 04 Odddrawers Drwr 00 Drwr 02 Drwr 04 Drwr 06 Drwr 08 Evendrawers Line drawer 9 Physical line drawers –48V RA RB Line drawer 4 +15V Line drawer 8 +5V –48V RA RB Line drawer 3 +15V Line drawer 7 +5V Line drawe
3-14 Ringing in Series II peripherals Ringing generator control The LCM is provisioned with two ringing generators. Each unit of the LCM can connect to either ringing generator. The SWRG command available at the MAP terminal switches a unit or both units from one ringing generator to the other. LCM processors monitor status bits from the ringing generators. If a problem is detected, system software attempts to resolve any trouble condition by a variety of methods including switching ringing generators.
Ringing in Series II peripherals 3-15 The following paragraphs describe the function of LCM hardware components only as they relate to the LCM ringing system. NT6X51 processor The NT6X51 processor card schedules ringing and controls the relays on the power converter card (NT6X53), the bus interface card (NT6X54), and the line card. The relays operate in accordance with information from the DMS-100 CC and the ringing generator. Note: The NT6X51 processor card exercises no control over the ringing generator.
3-16 Ringing in Series II peripherals NT6X54 bus interface The NT6X54 bus interface card (BIC) multiplexes and demultiplexes PCM samples and control messages to and from the LCM line cards over the 32-channel digroups. It also contains relays that switch ringing or ANI/coin voltages to the line cards. Under the direction of the LCM processor card, the bus interface card ringing relays connect the ringing generator output to the appropriate line card ringing bus.
Ringing in Series II peripherals 3-17 Detailed ringing schematic The schematic in theFigure 3-6, "Detailed ringing schematic" on page 3-18 shows the signal path from the ringing generators to the line drawers located in both units of the LCM. This signal path includes the NT6X53AA power converters in both LCM units and the NT6X54AA BICs in the line drawers. The schematic shows ringing generator outputs to only one LCM for clarity; the outputs shown in this figure connect to both LCMs in the LCE.
–48V +48V –130V +130V 61A 61B 62A 62B 47B 48B 47A 48A K4 K9 RA 64A 64B K10 K3 K2 K1 R49 65A RB 65B Current detector K5 K6 50A–54A 50B–54B 55A–59A 74B 74A 75B 75A 76B 76A 77B 77A K4 K5 K1 K2 R Ring bus T Odd LSG R Ring bus T Even LSG 55B–59B NT6X54AA in drawers 0–9 RB RG0 R T –48V +48V –130V +130V 6X53AAin Unit 0 61A 61B 62A 62B 47B 48B 47A 48A K4 K9 RA 64A 64B K10 K3 K2 K1 R49 65A 65B Current detector K5 K6 50A–54A 50B–54B 55A–59A 55B–59B 74B 74A 75B 75A 76B 76A 77B 77A K4 K5
Ringing in Series II peripherals 3-19 Ringing signals Ringing and ANI/coin voltages enter the LCM through the NT6X53 power converter. Relays on the power converter provide a control function for ringing that is completely independent of the power supply function. Relay K4 on the NT6X53 power converter selects between the ringing voltages provided by the two ringing generators (see Figure 3-6, "Detailed ringing schematic.").
3-20 Ringing in Series II peripherals RMS This normally low bit goes high to indicate a low ringing voltage condition. This occurrence indicates a trouble condition to which the system will respond. ACT RG 0 provides ANI/coin voltages to the even-numbered units (unit 0 of both LCMs) in the LCE frame. RG 1 provides ANI/coin voltages to the odd-numbered units (unit 1 of both LCMs). The ANI/coin trouble (ACT) bit is normally low and goes high when a problem occurs with any of the ANI/coin voltages.
Ringing in Series II peripherals 3-21 ANI/coin signals ANI/coin signals are transmitted from the NT6X53 on a two-wire bus, but, unlike bridged ringing signals, they are not returned in the loop. Instead ANI/coin signals are directed to ground at the subscriber premises and current is recovered at the ground window of the central office. ANI/coin signals may be applied to both tip and ring together or just to the tip lead.
3-22 Ringing in Series II peripherals Ringing process The LCM/RLCM ringing process performs the following tasks: • ringing synchronization • ringing generator output zero-crossing detection • ringing scheduling Ringing synchronization task The ringing synchronization task performs the following functions: • waits for messages from the ringing schedule task to operate or release ringing relays • informs the ringing schedule tasks of upcoming subcycle transitions • measures the time between subcyc
Ringing in Series II peripherals 3-23 Upon receiving a ANI/coin cancel message, the ringing schedule task sends a message to the ringing synchronization task instructing it to release the ANI/coin voltage relay from the line. Ringing and ANI/coin messaging Ringing and ANI/coin requests that are queued by the ringing schedule task are processed by a ringing state machine or ANI/coin state machine that is driven by the ringing schedule task.
3-24 Ringing in Series II peripherals to the time slot corresponding to the subcycle transition. This ensures that the time slot transitions are synchronized with the subcycle transitions. Ringing sequence flowchart This section describes the sequence of events that occur in the ringing processes of the LCM during normal operation (non-ESA).
Ringing in Series II peripherals 3-25 Figure 3-8 LCM ringing sequence diagram DMS-100 CC 1 Sends ringing request message indicating line to be rung DMS-100 CC LCM 2 Ringing schedule task verifies request is directed to valid line and channel is associated with line 3 Ringing schedule task sends request accepted message (if required by DMS-100 CC) 4 Ringing schedule task copies ringing request message into call data block associated with call 5 Ringing schedule task instructs supervisory tasks to s
3-26 Ringing in Series II peripherals Ringing generator configuration change procedure Follow this procedure to change the ringing configuration in host and remote line concentrating module (LCM) configurations. During this procedure, the LCM units enter an in-service trouble (ISTb) state because of ringing cadence differences. The ISTb state clears after you or the system starts a test. Perform this procedure during a low traffic period.
Ringing in Series II peripherals 3-27 Figure 3-9 Summary of Dual LCM ringing generator configuration change procedure This flowchart provides a summary of the procedure. Check the configurationin table LCMINV Use the instructions in the step-action procedure that follows this flowchart to perform the procedure.
3-28 Ringing in Series II peripherals Procedure 3-1 Dual LCM ringing generator configuration change procedure At the MAP terminal 1 To access table LCMINV, type > TABLE LCMINV and press the Enter key. 2 To position on the tuple for the first LCM, type > POS HOST 0 0 and press the Enter key. Example of a MAP display: >POS HOST 0 0 HOST 00 0 LCE 4 N 3 256K 256K LCM Y F REA 1 20 P 30 29 6X04AA XLCM11BD 40 LTC 0 (16)(18)(17)(19)$ 50 HLCM RNGTYPE is set to frequency selective (F).
Ringing in Series II peripherals 3-29 7 To post the the first LCM in the frame or cabinet, type > POST LCM 0 0 and press the Enter key. Example of a MAP display: SysB 0 0 PM LCM LCM Unit0: Unit1: HOST 00 0 InSv InSv Drwr: 01 .. 23 .. InSv 45 .. 67 .. ManB 0 0 Links_OOS: /RG: /RG: 11 11 89 10 23 .. .. .. OffL 0 0 CBsy 0 0 ISTb 3 0 InSv 39 4 CSide 0 , PSide 0 0 0 11 11 11 RG: Pref 0 InSv 45 67 89 Stby 1 InSv .. .. .. Both units use ringing generator 0 (RG-0).
3-30 Ringing in Series II peripherals SysB 0 0 PM LCM LCM Unit0: Unit1: ManB 0 0 HOST 00 0 InSv ManB InSv Links_OOS: Takeover /RG: /RG: 11 11 45 67 89 10 23 .. .. .. .. .. Drwr: 01 23 .. .. bsy unit 1 LCM HOST 00 1 Unit 1 OffL 0 0 CBsy 0 0 ISTb 3 0 InSv 39 4 CSide 0 , PSide 0 0 0 11 11 11 RG: Pref 1 InSv 45 67 89 Stby 0 InSv .. .. .. Bsy Passed Note: It is necessary to busy the unit so that the mate unit enters a takeover.
Ringing in Series II peripherals 3-31 Note: Perform this step for each LCM unit that needs to use RG-0. The result of switching ringing generators will result in a MAP terminal display like the following. Example of a MAP display: SysB 0 0 PM LCM LCM Unit0: Unit1: HOST 00 1 InSv InSv Drwr: 01 .. 23 .. InSv 45 .. 67 .. ManB 0 0 Links_OOS: /RG: /RG: 11 11 89 10 23 .. .. .. OffL 0 0 CBsy 0 0 ISTb 3 0 InSv 39 4 CSide 0 , PSide 0 0 0 11 11 11 RG: Pref 0 InSv 45 67 89 Stby 1 InSv .. .. ..
3-32 Ringing in Series II peripherals Top view 12345678 12345678 12345678 12345678 SW4 SW3 SW2 SW1 Locking lever tabs Not e : “On” and “Off” settings for DIP switches can differ among ringing generators. 17 Faceplate Reseat RG-1 and restore power. At the MAP terminal 18 To quit the PM level of the MAP terminal, type > QUIT ALL and press the Enter key. 19 To access table LCMINV, type > TABLE LCMINV and press the Enter key.
Ringing in Series II peripherals 3-33 Enter Y to continue processing the change request and press the Enter key. Example of a MAP responce: LCMTYPESEL: LCM Example of a MAP responce: Press the Enter key to leave this entry as it is. Example of a MAP responce: RGEQUIP: Y Press the Enter key to leave this entry as it is. Example of a MAP responce: RNGTYPE: F Enter UNASSIGNED and press the Enter key. Press Enter when the system prompts you to change the value of other fields in the tuple.
3-34 Ringing in Series II peripherals 26 To exit table LCMINV, type > QUIT ALL and press the Enter key. 27 To enter the PM level of the MAP terminal, type > MAPCI;MTC;PM and press the Enter key. 28 To post the first LCM and return it to service, type > POST LCM 0 0 and press the Enter key. > RTS UNIT 1 and press the Enter key. 29 To post the second LCM and return it to service, type > POST LCM 0 1 and press the Enter key. > RTS UNIT 1 and press the Enter key.
Ringing in Series II peripherals 3-35 35 To post the first LCM, type > POST LCM 0 0 and press the Enter key. 36 37 Are the units in the LCM aliged to use RG-1? If both LCM units Do are aligned and both use RG-1 Step 38 are not aligned or both do not use RG-1 Step 37 To get an LCM unit to use RG-1, type > SWRG UNIT unit_no and press the Enter key.
3-36 Ringing in Series II peripherals At the LCE frame/cabinet 40 WARNING Static electricity damage Before removing any cards, put on a wrist strap and connect it to the wrist strap grounding point on the left side of the frame supervisory panel of the LCM. This protects the equipment against damage caused by static electricity. WARNING Equipment damage Take the following precautions when removing or inserting a card: 1. Do not apply direct pressure to the components. 2.
Ringing in Series II peripherals 3-37 46 To test the LCM units, type > POST LCM 0 0 and press the Enter key. > TST UNIT 0 and press the Enter key. > POST LCM 0 1 and press the Enter key. > TST UNIT 0 and press the Enter key. Note: This step tests the ringing generators. 47 You completed this procedure. Single LCM configuration This procedure describes how to reconfigure the ringing generators in peripheral modules (PM) in a single LCM configuration.
3-38 Ringing in Series II peripherals Figure 3-10 Summary of Single LCM ringing generator configuration change procedure This flowchart provides a summary of the procedure. Check the configurationin table LCMINV Use the instructions in the step-action procedure that follows this flowchart to perform the procedure.
Ringing in Series II peripherals 3-39 Procedure 3-2 Single LCM ringing generator configuration change procedure At the MAP terminal 1 To access table LCMINV, type > TABLE LCMINV and press the Enter key. 2 To position on the tuple for the LCM, type > POS RLCM 0 0 and press the Enter key. Example of a MAP display >POS RLCM 0 0 RLCM 00 0 RLCM 4 N 3 256K 256K LCM Y F REA 1 20 30 P 40 29 6X04AA XLCM11BD 50 HLCM LTC 0 (16)(18)(17)(19)$ RNGTYPE is set to frequency selective (F).
3-40 Ringing in Series II peripherals SysB 0 0 PM LCM LCM Unit0: Unit1: RLCM 00 0 InSv InSv Drwr: 01 .. 23 .. InSv 45 .. 67 .. ManB 0 0 Links_OOS: /RG: /RG: 11 11 89 10 23 .. .. .. OffL 0 0 CBsy 0 0 ISTb 3 1 InSv 18 0 CSide 0 , PSide 0 0 0 11 11 11 RG: Pref 0 InSv 45 67 89 Stby 1 InSv .. .. .. Both units use ringing generator 0 (RG-0).
Ringing in Series II peripherals 3-41 At the frame 10 WARNING Static electricity damage Before removing any cards, put on a wrist strap and connect it to the wrist strap grounding point on the left side of the frame supervisory panel of the LCM. This protects the equipment against damage caused by static electricity. WARNING Equipment damage Take the following precautions when removing or inserting a card: 1. Do not apply direct pressure to the components. 2. Do not force the cards into the slots.
3-42 Ringing in Series II peripherals 12 Reseat RG-1 and restore power. At the MAP terminal 13 To quit the PM level of the MAP terminal, type > QUIT ALL and press the Enter key. 14 To access table LCMINV, type > TABLE LCMINV and press the Enter key. Example of a MAP responce: CI: TABLE: LCMINV 15 To postion on the tuple for the LCM, type > POS RLCM 0 0 and press the Enter key. 16 To change the ringing scheme, type > CHA LCMTYPE and press the Enter key.
Ringing in Series II peripherals 3-43 18 To exit table LCMINV, type > QUIT ALL and press the Enter key. 19 To access the PM level of the MAP terminal, type > MAPCI;MTC;PM and press the Enter key. 20 To post and return to service the LCM unit, type > POST LCM RLCM 0 0 and press the Enter key. > RTS UNIT 1 and press the Enter key. 21 The following steps complete the procedure for RG-0.
3-44 Ringing in Series II peripherals At the frame 26 WARNING Static electricity damage Before removing any cards, put on a wrist strap and connect it to the wrist strap grounding point on the left side of the frame supervisory panel of the LCM. This protects the equipment against damage caused by static electricity. WARNING Equipment damage Take the following precautions when removing or inserting a card: 1. Do not apply direct pressure to the components. 2. Do not force the cards into the slots.
Ringing in Series II peripherals 3-45 Ringing in the Universal Edge 9000 The architecture of the POTS functionality in the Universal Edge 9000 (UEN) borrows heavily from the LCM. This is because the time division multiplexing (TDM) software functions the same as that of the LCM in the DMS-100 system.
3-46 Ringing in Series II peripherals Figure 3-11 UEN shelf and line card layout 01 21 L i n e L i n e L i n e L i n e L i n e L i n e L i n e L A A i T T n M M e c a r d c a r d c a r d c a r d c a r d c a r d c a r d c a r d T D M T L L D i i M n n e e L i n e L i n e L i n e L i n e L i n e L i n e c a r d c a r d c a r d c a r d c a r d c a r d c a r d c a r d 00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 L i n e L i n e L i n e L i n e L i n e L i n e L i n e
Ringing in Series II peripherals 3-47 Ringing in the Remote Line Concentrating Module The Remote Line Concentrating Module (RLCM) is a repackaged LCM located remotely from the central office and connected to it by DS-1 links. The RLCM consists of the following components: • one LCM • host interface equipment shelf (contains the ringing generator cards) • frame supervisory panel • remote maintenance module Because only one LCM is provisioned in the RLCM, RG 0 serves unit 0 and RG 1 serves unit 1.
4-1 4 Administration of DMS ringing Assigning ringing to line modules This section describes the administration of the DMS-100 ringing system. Administration of the ringing system involves assigning ringing types to peripheral modules (PM) by datafilling the inventory tables in the DMS-100 data store (DS). In this section, the data tables involved in administering the DMS-100 ringing system are listed and the procedure for datafilling each table is provided.
4-2 Administration of DMS ringing Ringing generators Following is a list of the LME and RLE ringing generators and the ringing types each supports: • NT2X27AA - coded and superimposed • NT2X27AB - decimonic and coded (30 Hz) • NT2X27AC - harmonic • NT2X27AD - synchromonic 16 • NT2X27AE - synchromonic 20 • NT2X27AF - BOC (105 VRMS) The ringing generators installed in the LM or RLM must be compatible with the ringing type assigned to the LM or RLM.
Administration of DMS ringing 4-3 the SERVORD Reference Manual. Information regarding the relationship between line cards and ringing types is summarized in the following table.
4-4 Administration of DMS ringing Line cards As with the LM and RLM, the LCM and RLCM must contain line cards that support the ringing type assigned to them. The LCM and RLCM use the same line cards as the LM and RLM. The table "Line class codes by line card type and ring code" lists the line cards and the ringing types they support. When assigning ringing to an LCM or RLCM, you must ensure that compatible line cards are installed.
Administration of DMS ringing 4-5 Line cards The RCT uses the following line cards: • QPP405 - single party remote • QPP497 - universal remote • QPP409 - universal coin remote • QPP440 - frequency selective remote • QPP445 - superimposed remote • QPP541 - frequency selective remote All line cards installed in the RCT must support the type of ringing assigned to the SCM-100R. The following table lists the compatibility between the RCT ringing generators and line cards.
4-6 Administration of DMS ringing Assigning ringing to SCM-100U Assigning ringing to the SCM-100U involves installing the proper ringing generators and line cards at the DMS-100U and datafilling table RCUINV. Ringing generator The remote concentrator terminal (RCT) uses the NT3A39 ringing generator, which supports single-party 20 Hz ringing and multiparty coded ringing. A description of the NT3A39 ringing generator is in DMS-1 Urban Circuit Pack Descriptions.
Administration of DMS ringing 4-7 cards on the appropriate PM and by using SERVORD to affect the changes. A description of SERVORD is in the SERVORD Reference Manual. Setting immediate ring enable Immediate ring enable can be enabled or disabled by setting parameter IMMEDIATE_RING_ENABLE in table OFCENG to Y (yes) or N (no). Instructions on setting parameter IMMEDIATE_RING_ENABLE can be found by referring to Office Parameters Reference Manual.
4-8 Administration of DMS ringing Table LMRNG Table LMRNG defines the ringing type for each LM or RLM. Coded 30 Hz ringing is required for distinctive ringing. Entering the C30 in the LMRNG_SELECTOR field will provide the coded 30 Hz ringing for the LM or RLM. Table LCMINV Field LMRNG_SELECTOR in table LCMINV defines the ringing type for each LCM or RLCM. Coded 30 Hz ringing is required for distinctive ringing.
5-1 5 Ringing system maintenance Ringing user interface The DMS-100 user interface allows ringing generators to be serviced from the DMS-100 MAP terminal. Commands at the PM level of the MAP terminal allow the ringing generators of most line PMs to be posted, manually busied, tested, returned to service, and be made offline. Ringing generator overload control Software controls in the DMS-100 peripherals limit the loading on the ringing generators.
5-2 Ringing system maintenance RG overload control - Series II peripherals Series II peripherals are all of the LCM-based peripherals. As with the Series I peripherals, the ringing bus on the Series II peripherals is monitored by current and voltage monitors, which react when current and voltage thresholds on the ringing bus are exceeded. The current monitor detects current through the ringing bus.
Ringing system maintenance 5-3 determine if the ringing trip was valid. If the line is found to be on-hook after ringing trip, the DMS-100 switch generates a pre-trip log report. To reduce the possibility of these spurious signals from being interpreted as a valid answer, the duration of the off-hook signal considered as a valid off-hook has been changed throughout the development of the DMS-100 switch.
5-4 Ringing system maintenance LM When ringing occurs, the line card is instructed to encode the ringing waveform instead of the transmit voice signal. The line card then sends a digital representation of the ringing waveform through PCM data to the PM software. The PM software examines this data to determine the presence of the ringing voltage.
Ringing system maintenance 5-5 situation, the ringing resources are tied up unnecessarily for the duration of RNG_TMEOUT_NO_OF_SEC, when other ringing requests may be blocked. To avoid this, set RNG_TMEOUT_NO_OF_SEC to as short a period as practical. Bad CP IO msg The bad-CP-IO-msg log accompanies LINE logs 205, 205, and 206. It indicates the DMS-100 central control (CC) has received a corrupted message from the PM.
5-6 Ringing system maintenance PM Type: LCM Int. No.: 2 Status index: 0 Node_No: 36 Memory Size - Unit 0: 256K , Unit 1: 256K Loadnames: LCMINV - BBB , Unit0: XLCM05AK, Unit1: XLCM05AK LCM HOST 00 0 is included in the list of LCM types scheduled for a REX test. REX on LCM HOST 00 0 has not been performed. Node Status: {OK, FALSE} Identifies which ringing Unit 0 Status: {OK, FALSE} /RG: 0 generator is selected.
Ringing system maintenance 5-7 In addition to the DMS-100 MAP terminal, feature package NTX215 allows a DMS-100 to be monitored by a No. 2 SES. This feature can be used to monitor calls through the DMS-100 to isolate intermittent ringing problems.
DMS-100 Family DMS-100 Ringing System General Description Product Documentation-Dept3423 Nortel Networks PO Box 13010 RTP, NC 22708-3010 Telephone: 1-877-6625669 Electronic mail: cits@nortelnetworks.com Copyright © 1990, 1991, 1993, 1994, 1995, 1996, 1998, 1999, 2000 Nortel Networks, All Rights Reserved NORTEL NETWORKS CONFIDENTIAL: The information contained herein is the property of Nortel Networks and is strictly confidential.
