ADTRAN Network Router DSU 56 Manual do Utilizador descarregar pdf (Página 26)

Chapter 2. Installation

2-4 DSU 56/64 User Manual 61200062L1-1

Remote Digital Loopback (RDL) - SW 6

Down - Enable

The DSU 56/64 accepts the industry standard V.54 RDL command

from the far end of the circuit.

Up - Disable

The DSU 56/64 does not respond to the V.54 loopback command

from the far end of the circuit.

Loop Rate - SW 7

Down - 56 Kbps

The network interface of the DSU 56/64 is configured for operation

at 56 kbps.

Up - 64 kbps

The network interface is configured for 64 kbps operation.

Scrambler - SW 8

For 64 kbps clear channel operation, there is a possibility that the

DTE data sequenced might mimic network loop maintenance

functions and erroneously cause other network elements to activate

loopbacks. To prevent this, the Scrambler switch should be set to

the Down (On) position.

The S

CRAMBLER

option must be set the same for both the local

and remote 56/64 DSUs for the situation described above.

The option is only valid when the 64 kbps rate is selected.

Down - On

The scrambler is enabled.

Up - Off

The scrambler is disabled.

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ADTRAN Network Router DSU 56 Manual do Utilizador Página 26