Power Requirements - Avaya Nortel Communication Server 1000 Reference

Power requirements

The DTI/PRI obtains its power from the backplane, and draws less than 2 amps on +5 V, 50
mA on +12 V, and 50 mA on –12 V.
Foreign and surge voltage protection
Lightning protectors must be installed between an external T1 carrier facility and the system.
For public T1 facilities, this protection is provided by the local operating company. In a private
T1 facility environment (a campus, for example), the NTAK92 protection assembly can be
used.
The NTRB21 circuit card conforms to safety and performance standards for foreign and surge
voltage protection in an internal environment.
Functional description
NTRB21 provides the following features and functions:
• configurable parameters, including A-Law and µ-Law operation, digital pads on a per
channel basis, and Superframe or Extended Superframe formats
• AMI or B8ZS line coding
• 1.5 Mb Digital Trunk Interface and 1.5 Mb Primary Rate Interface
• 1.5 Mb Clock recovery and distribution of reference clocks
• DG2 or FDL yellow alarm methods
• card status and alarm indication with faceplate-mounted LED
• automatic alarm monitoring and handling
• Card-LAN for maintenance communication
• loopback capabilities for both near-end and far-end
• echo canceler interface
• integrated trunk access (both D-channel and in-band A/B signaling can be mixed on the
same PRI)
• faceplate monitor jacks for T1 interface
• configurable D-channel data rate with 64 kbps, 56 kbps or 64 kbps inverted
• self-test
Circuit Card Reference
Functional description
July 2011 655