Nortel Networks 311 User Manual
Functional description
867
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.
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 NTAK09 circuit card conforms to safety and performance standards for
foreign and surge voltage protection in an internal environment.
foreign and surge voltage protection in an internal environment.
Lightning protectors must be installed between an external T1 carrier facility
and the Option 11C cabinet. 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 may be used.
and the Option 11C cabinet. 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 may be used.
The NTAK09 circuit card conforms to safety and performance standards for
foreign and surge voltage protection in an internal environment.
foreign and surge voltage protection in an internal environment.
Lightning protectors must be installed between an external T-1 carrier facility
and the CS 1000 system. For public T-1 facilities, this protection is provided
by the local operating company. In a private T-1 facility environment (a
campus, for example), the NTAK92 protection assembly can be used.
and the CS 1000 system. For public T-1 facilities, this protection is provided
by the local operating company. In a private T-1 facility environment (a
campus, for example), the NTAK92 protection assembly can be used.
The NTAK09 circuit card conforms to safety and performance standards for
foreign and surge voltage protection in an internal environment.
foreign and surge voltage protection in an internal environment.
Functional description
NTAK09 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
pads on a per channel basis, and Superframe or Extended Superframe
formats
•
AMI or B8ZS line coding
•
1.5 Mb Clock recovery and distribution of reference clocks
•
DG2 or FDL yellow alarm methods
•
card status and alarm indication with faceplate-mounted LEDs
•
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)
be mixed on the same PRI)
•
faceplate monitor jacks for T1 interface
Nortel Communication Server 1000
Circuit Card Reference
NN43001-311
01.04
Standard
Release 5.0
23 May 2008
Copyright © 2003-2008, Nortel Networks
.