ADTRAN DSU 56/64, Руководство пользователя

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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
O
N
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.