Owner's manual

Electrical specifications 601

Table 219

Insertion Loss from IPE Ports to IPE Ports (measured in dB)

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

2dB

— or used when impedance compensation is not provided

Table 220 "Insertion Loss from IPE Ports to IPE Ports (measured in

dB)" (page 602) shows PAD settings and the resulting port-to-port loss

for connections between the Universal Trunk Card (UTC) and any other

Intelligent Peripheral Equipment (IPE) or Peripheral Equipment (PE) unit,

denoted as Port B

Nortel Communication Server 1000

Circuit Card Reference

NN43001-311 02.06 Standard

27 August 2008