Nortel-networks Circuit Card Manual de usuario Pagina 612

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Page 612 of 906 NT8D14 Universal Trunk card
553-3001-211 Standard 3.00 August 2005
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
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