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Data Sheet

S0 Attachment

S0 Attachment for 4FTR and LCPU

The S0 attachment is used to connect the DVS-21 to ISDN telephone systems and is

conceived for live public address (coming and going).

The S0 attachment can only be used in combination with the carrier card 4FTR or the

LCPU. The 4FTR can accept up to four attachments and the LCPU one attachment.

E1, S0 and UART attachments can be freely combined on the 4FTR.

At a Glance:

• Remote (live) public address system on e.g. train platforms

• Storing of up to 16 call numbers for incoming calls

⇒ Authentication and prioritizing of the 16 callers using

call identification (CLIP)

• Storing of up to 32 call numbers for outgoing calls

• Automatic calling of a service number when a malfunction

occurs in the system

⇒ Provides error message from audio databank

• Acknowledge audio signals to

⇒ Signal readiness for speaking

⇒ Signal successful announcement (positive

acknowledgement)

⇒ Signal error message (negative acknowledgement)

Fig. 1: Front side S0 attachment Fig. 2: Rear side S0 attachment

(L- No. 2.870)

Date

20.08.2008

Page:

1/10

Author:

Document-No.:

S0_DB_2870_01

Summary of content (10 pages)

PAGE 1
Data Sheet S0 Attachment S0 Attachment for 4FTR and LCPU The S0 attachment is used to connect the DVS-21 to ISDN telephone systems and is conceived for live public address (coming and going). The S0 attachment can only be used in combination with the carrier card 4FTR or the LCPU. The 4FTR can accept up to four attachments and the LCPU one attachment. E1, S0 and UART attachments can be freely combined on the 4FTR. At a Glance: • Remote (live) public address system on e.g.
PAGE 2
Data Sheet S0 Attachment S0 Attachment for 4FTR and LCPU The following block diagram illustrates the way the S0 attachment for 4FTR or LCPU functions.
PAGE 3
Data Sheet S0 Attachment S0 Attachment for 4FTR and LCPU Public addressing can be carried out for remote locations with the digital switching system DVS-21 over private and public communications networks. Two typical application examples are shown as follows.
PAGE 4
Data Sheet S0 Attachment S0 Attachment for 4FTR and LCPU Work station with monitor Telephone PABX ISDN BA S0 DVS- 21 Loudspeaker circuit 1 Call staion (DTA-030) Loudspeaker circuit n Example 2: Remote public over PABX systems The second example is used typically in industrial applications. For this the telephone system must have at least one ISDN basis connection as interface for the DVS-21 system. Public addressing for remote locations can be carried out here, too, through various devices.
PAGE 5
Data Sheet S0 Attachment S0 Attachment for 4FTR and LCPU Function Description: A call number with an appropriate priority is allocated to each loudspeaker circuit. Up to 16 call numbers can be stored on the S0 attachment for announcements. An authentication is carried out by comparing the call number of the caller with the stored call numbers. The DVS-21 system permits allocation of 99 priorities for low frequency (LF) connections.
PAGE 6
Data Sheet S0 Attachment S0 Attachment for 4FTR and LCPU The following flow chart illustrates how an S0 public address system works: Call S0 Pub. Addr. Authority Check no Authorized? Depending on System yes Check System Status Ignore Caller? yes no Depending on System Busy? yes Priority Check no Voice Output Configured? Higher Priority? yes Neg. ACK Voice Output yes Public Address with Lower Priority is Interrupted Pos.
PAGE 7
Data Sheet S0 Attachment S0 Attachment for 4FTR and LCPU In the second flow chart the process of calling a service number is illustrated: DVS-21 Signal (Line 100) Service Number is Called After Preset Time yes Busy? System Hangs Up no Call Accepted? no yes Depending on Configuration Voice Output Configured? no yes Audio Signal Configured? yes Voice Output Audio Signal System Hangs up Return Call Expected According to Schedule Return Call Received? no yes System Hangs Up (End) Date
PAGE 8
Data Sheet S0 Attachment S0 Attachment for 4FTR and LCPU Arrangement of a DVS-21 for S0 public address: The DVS-21 public address system has a modular structure. A system can consist of one or multiple 19” attachment racks in which all attachments for control and switching as well as the power supply attachment (input 48/60 Volt) are placed.
PAGE 9
Data Sheet S0 Attachment S0 Attachment for 4FTR and LCPU The Front Plate Symbols and their Meaning: The System Blinker Addressing from processor taking place I/O Input/Output BUS output works as push-push operation with the system blinker BUS input works as push-pull operation with the system blinker On Channel Active Live public address (LF) Al Error in Attachment (Card related display) Receiving: Control Data from External Interface (Card related display) Sending: Control Data to External Interf
PAGE 10
Data Sheet S0 Attachment S0 Attachment for 4FTR and LCPU Temperature Range: 0 °C to 45 °C Weight (4FTR): 155 g Weight (S0 Attachment): xx g per attachment Installation Height (4FTR): 3HE Installation Width (4FTR): 6TE Dimensions (S0 Attachment): 34 mm x 80 mm (height x width) Number of Modules: Date 20.08.2008 Page: 10/10 4FTR: LCPU: Æ up to 4 attachments Æ 1 attachments Author: HS Document-No.