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Table 2. DSX-1 Interface Options
8774-A2-GZ40-30
Port Status
Possible Settings: Enable, Disable
Default Setting: Enable
Determines whether the port can be configured and used.
Line Framing (LTU Only)
Possible Settings: ESF, D4
Default Setting: ESF
Specifies the framing format to be used by the DSX interface.
H
Line Framing is only available when the unit is configured as an LTU. The NTU is
automatically configured to match the framing format used by the LTU.
Line Coding Format
Possible Settings: AMI, B8ZS
Default Setting: B8ZS
Specifies the line coding format to be used by the DSX interface.
Line Equalization
Possible Settings: 0-133, 133-266, 266-399, 399-533, 533-655
Default Setting: 0-133
Compensates for signal distortion for a DSX-1 signal over a given cable length.
Excessive Error Rate Threshold
Possible Settings: 1E–4, 1E–5, 1E–6, 1E–7, 1E–8, 1E–9
Default Setting: 1E–4
Determines the error rate at which an excessive error rate (EER) condition is
recognized. The rate is the ratio of the number of CRC5 errors to the number of bits
received in a certain period.
Send AIS on Network Failure
Possible Settings: Enable, Disable
Default Setting: Enable
Specifies the action taken on the signal transmitted to the DSX-1 when a valid signal
cannot be recovered from the network interface (LOS or OOF).
Send All Ones on DSX-1 Failure
Possible Settings: Enable, Disable
Default Setting: Enable
Specifies the action taken on the signal transmitted to the network when a valid signal
cannot be recovered from the network interface (LOS or OOF).
Primary Clock Source
Possible Settings: DSX-1, Internal
Default Setting: Internal
Specifies where the unit will derive its timing from.
H
Primary Clock Source is only available when the unit is configured as an LTU. If
DSL Line Rate is set lower than 1552 kbps, Primary Clock Source is forced to
DSX-1 and cannot be changed.
February 2001
11
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