Avaya 6211 Guia Do Utilizador

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A mode of operation in which the DEFINITY High Speed Link
retransmits the received digital line signal back to the switch.
Only the switch can activate the DCP Looparound test.

Local DTE

Transmitter

Receiver

High Speed Link

S

W

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T

C
H

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This test is conducted by switch maintenance personnel when line
problems are encountered. Passing this test indicates that the
digital line and the line interface circuits in the HSL are operating
properly.