User guide

80
lation (PCM) conversions on a per channel basis, allowing compatibility
between the North American and international DMS-100 switches. The
universal time switch can perform nine different types of PCM conversions
from central side (C-side) to peripheral side (P-side) and vice versa. The
NT6X44EA can directly replace all current versions of the NT6X44 except
the AC and CA versions.
NT6X45 — Master processor has been replaced has been replaced with the
NTMX77 Unified Processor (XPM PLUS).
NT6X46 — Signalling processor memory has been replaced with the
NTMX77 Unified Processor (XPM PLUS).
NT6X47 — Master processor memory has been replaced with the
NTMX77 Unified Processor (XPM PLUS).
Note:
For further information on the NT6X48 card link and port assign-
ments, see the “XPM PACK RELATIONSHIP DIAGRAM” and the
“LTC/LGC shelf” hardware diagram within this QRG.
NT6X48 (see previous note) — The DS30A interface card, located in the
LGC, LTC, LTCI/DTCI, RCC, MSB7, and TPC contains ten separate ports.
Each port provides a two-way voice and data interface and carries a
32-channel, 2.56-Mbps bit stream. Each DS30A port contains a loopa-
round circuit for fault isolation.
Note: For further information on the following NT6X50 card DIP switch
settings, see the “DIP Switch Settings for the 6X50 & 6X85 DS1” within
this QRG.
NT6X50
(see previous note) — The DS1 card, found in the DTC, LGC,
LTC, SMA, SMR, LTCI/DTCI, HIE, TMS, and RCC shelves, contains 2
DS1 ports. One to ten cards provisionable for each LTC module provides
2-way voice and data interface, looparound paths, Xmission of local alms,
detection of remote alarms, anddetection of error conditions such as loss of
synchronization, bipolar errors, and slips. Note: It has been reported that
6X50AA cards below release #OU can cause slips. The NT6X50AB card is
the DS1 Extended Super Frame (ESF) interface card. The NT6X50BA
will be required for ISDN-3 applications. The NT6X50EC is used to pro-
vide near-end echo cancellation on one or more DS1 trunks.
NT6X51 — The line concentrating module (LCM) processor controls the
activity of the LCA and functions as the interface between the DS30A links
and the digroup controller; preforms sanity checks, collects digits and mes-
saging for up to 640 lines, monitors power and ringing functions, and
recovers and generates clock signals. NT6X51AA = 64K Memory
NT6X51AB/AC = 256K Memory
NT6X52 — The digroup controller functions as an interface for up to three
DS30A links and up to ten LCM drawers; supplies time switching for both
external and internal channel assignments and provides the digital loopa-
round paths used for troubleshooting.
NT6X53 — This power converter supplies +5V, -5V, +15V,-15V dc;
includes relay circuits that apply the ringing, ANI, and coin voltages
(which are generated by the ringing generators) to the line cards in the
NT6X05 Line Drawers. Each power converter functions as a backup for
the converter in the associated LCA.
NT6X54
— The Bus Interface Card (BIC) is located in the Line Drawer. It
provides Ethernet data functions when installed in a Line Drawer with a
NTEX54 Data BIC (DBIC)—a subscriber is provided with data at 1 MBPS
downstream and 128 Kbit/s upstream with POTS service.
NT6X60
— This ringing generator contains two cards: the NT6X38 for
ringing control and the NT6X37 for ringing amplification. Ringing signals
originate in the NT6X38 and are amplified to the required output level by
the NT6X37.
NT6X65 — The CCIS terminal card, located in the MSB6 shelf and ST7G
extension shelf, transmits and receives signaling data between a DMS
switch and CCIS and CCITT6 transmission links.
NT6X66 — The CCS7 terminal card, located within the MSB7 and ST7G
shelves, transmits and receives signaling data over CCS7 transmission
links, implements the CCS7 link protocol, and monitors signaling link per-
formance. The NT6X66CA is a signaling terminal interface circuit pack
used for digital private network signaling system (DPNSS) applications.
NT6X66BA is used for a NTT-NCCI #7 signalling link.
NT6X67 — This signalling terminal buffer card, located within the MSB6
and MSB7 shelves, generates and verifies parity on data transmitted
between the MSB6 and the ST controller (STC).
NT6X68 — The signaling terminal interface (STI) card, located within the
MSB6,MSB7, and ST7G shelves, provides latches for address, data, and
control lines to the STC for fault diagnosis and maintenance. Two STIs are
provided for each of the two groups of ST cards. Each group is referred to
as a signaling terminal group (STG). See the NT6X68 PEC code list within
this QRG.
NT6X69 — Common peripheral processor messaging protocol and tone
card, found in the DTC, LGC, LTC, SMA, SMR, SMU, LTCI/DTCI,
MSB7, TMS, and RCC shelves, provides interface for the parallel speech
bus and extracts control messages received on channel zero from the con-
trol module (CM). See the PEC codes within this QRG for a list of the
NT6X69 cards available.