Environmental Specifications; Foreign And Surge Voltage Protection; Release Control; Pad Switching - Meridian Nortel 1 Option 11C Technical Reference Manual

Environmental specifications

Table 116
Environmental specifications
Parameter
Operating temperature
Operating humidity
Storage temperature

Foreign and surge voltage protection

Release control

PAD switching

Table 116 lists the environmental specifications for the Universal Trunk
Card.
The Universal Trunk Card meets CS03 overvoltage (power cross)
specifications.
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).
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.
The class-of-service determines the operation of the switchable PADs
contained in each unit. They are assigned as follows:
• Transmission Compensated
— used for a two-wire non-VNL trunk facility with a loss of greater
than 2 dB for which impedance compensation is provided
NT8D14 Universal Trunk Card
0 to 50 degrees C, ambient
5 to 95% RH (non-condensing)
Option 11C and 11C Mini
Page 383 of 544
Specifications
- 40 to + 70 degrees C
Technical Reference Guide