Nortel Networks Circuit Card 사용자 설명서

 NT8D14 Universal Trunk card

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