Nortel Circuit Card Installation Manual page 611

Foreign and surge voltage protection
The NT8D14 Universal Trunk card meets UL-1489 and CS03 over-voltage
(power cross) specifications and FCC Part 68 requirements.
Environmental specifications
Table 187 lists the environmental specifications for the NT8D14 Universal
Trunk card.
Table 187
Environmental specifications for the NT8D14 Universal Trunk card
Parameter
Operating temperature
Operating humidity
Storage temperature
Release control
Release control establishes which end of a call (near, far, either, joint, or
originating) disconnects the call. Only incoming trunks in idle ground start
configuration can provide disconnect supervision. You configure release
control for each trunk independently in the Route Data Block (LD 16).
PAD switching
The transmission properties of each trunk are characterized by the
class-of-service (COS) you assign in the Trunk Data Block (LD 14).
Transmission properties may be via net loss (VNL) or non via net loss
(non-VNL).
Non-VNL trunks are assigned either a Transmission Compensated (TRC) or
Non-Transmission Compensated (NTC) class-of-service to ensure stability
and minimize echo when connecting to long-haul trunks, such as Tie trunks.
NT8D14 Universal Trunk card
Specifications
0° to +60° C (+32 to +140° F), ambient
0 to 50 degrees C, ambient
(Small Systems and CS 1000S)
5 to 95% RH (non-condensing)
–40° to +70° C (–40° to +158° F)
Circuit Card
Page 611 of 906
Description and Installation