5
7511-A2-GN10-10 January 1999
Table 1. Configuration Options (3 of 5)Switch Options and Usage Default in Bold
64CC Data Scrambler
S1-6 (DSU A)
S3-6 (DSU B)
S1 S2
S3 S4
DSU A
DSU B
ON ON
ON ON
Determines whether the DSU scrambles data to minimize the possibility
of the remote DSU falsely recognizing a loopback command.
Off Disable
Data scrambling is disabled.
ON Enable
Data scrambling is enabled.
V.54 Sequence
Detection
S1-7 (DSU A)
S3-7 (DSU B)
S1 S2
S3 S4
DSU A
DSU B
ON ON
ON ON
Determines whether the DSU responds to V.54 Loop Up and Loop
Down sequences from the remote DSU.
Off Disable
V.54 loop sequences are ignored.
ON Enable
The DSU responds to V.54 loop sequences.
Invert
TX Clock
S1-8 (DSU A)
S3-8 (DSU B)
S1 S2
S3 S4
DSU A
DSU B
ON ON
ON ON
Determines whether the DSU clock provided on interchange circuit
CT114 (TXC) is phase-inverted with respect to interchange circuit
CT103 (TXD). This can reduce errors encountered due to excessive
cable lengths.
Off Normal
TXC is not inverted.
ON Invert
TXC is inverted with respect to TXD.