Release Control; Pad Switching - Avaya Nortel Communication Server 1000 Reference

Table 172: Environmental specifications for the NT8D14 Universal Trunk card
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. 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
- or used for a four-wire non-VNL facility
• Non-Transmission Compensated
- used for a two-wire non-VNL trunk facility with a loss of less than 2 dB
- or used when impedance compensation is not provided
The insertion loss from IPE ports to IPE ports is as follows:
Circuit Card Reference
Parameter Specifications
0¡ to +60¡ C (+32 to +140¡ F), ambient
0 to 50 degrees C, ambient (Small Systems and
CS 1000E)
5 to 95% RH (non-condensing)
–40¡ to +70¡ C (–40¡ to +158¡ F)
Electrical specifications
July 2011 419