Nortel Networks 553-3001-211 manual Release control, PAD switching

NT8D14 Universal Trunk card Page 599 of 894

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 182 lists the environmental specifications for the NT8D14 Universal Trunk card.

Table 182

Environmental specifications for the NT8D14 Universal Trunk card

Parameter	Specifications
Operating temperature	0° to +60° C (+32 to +140° F), ambient
	0 to 50 degrees C, ambient
	(Small Systems and CS 1000S)
Operating humidity	5 to 95% RH (non-condensing)
Storage temperature	–40° to +70° C (–40° to +158° F)

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.

Circuit Card Description and Installation