Clock Reference - Avaya Nortel Communication Server 1000 Reference

NTDW79AAE5 Universal Digital Trunk card

Clock reference

The UDT card must synchronize its E1/T1 TDM stream with the Central Office or another PBX
clock.
The UDT card can work as a Master clock for other PBXs. The card uses an internal timing
source and generates the timing signal on E1/T1. The Clock Controller functionality is X11/X21
Software transparent.
Feature interactions
• The UDT CC daughter board can only be mounted on the UDT card.
• The NTAK20 CC daughter board can not be mounted on the UDT card.
• 75ohm impedance can be used by converting the UDT card 120ohm impedance using a
proper converter.
• The RS232 port is not to be used during normal operation and is for maintenance and
configuration only.
• The UDT card does not simulate the TMDI card (NTRB21). Do not configure the UDT
card as a TMDI card.
• The UDT card can be used starting with software release X21 Release 5.0 for CS 1000E
systems.
• The UDT card can coexist with other digital trunk cards within the same CS 1000E
cabinet.
• The UDT CC daughter board mounted on the UDT card can be used as the CC card
serving other digital trunk cards within the same CS 1000E cabinet.
• The NTAK20 CC daughterboard mounted on another digital trunk card can be used as
the CC card serving the UDT card within the same CS 1000E cabinet.
• The UDT card can be used as the Secondary clock reference for the NTAK20 CC daughter
board.
• Other digital trunk cards can be used as the Secondary clock reference for the UDT CC
daughter board.
• The UDT CC daughter board and the NTAK20 CC daughter board can be used in different
cabinets within the same system.
542 Circuit Card Reference
Comments? infodev@avaya.com
July 2011