Paradyne 7974 User Manual page 112

A. Configuration Options
Table A-5. DSX-1 Interface Options for Model 7974 (2 of 2)
A-8
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 distance.
0–133 feet – Provides equalization for a cable length up to 133 feet.
133–266 feet – Provides equalization for a cable length up to 266 feet.
266–399 feet – Provides equalization for a cable length up to 399 feet.
399–533 feet – Provides equalization for a cable length up to 533 feet.
533–655 feet – Provides equalization for a cable length up to 655 feet.
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 CRC 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 interface when a valid
signal cannot be recovered from the DSL network interface (LOS or conditions OOF or
EER).
Enable – An Alarm Indication Signal (AIS) is sent to the DSX-1 port in the event of an
LOS, OOF, or EER condition on the DSL interface.
Disable – The failed signal on the interface is passed through to the DSX-1 network
unchanged.
Primary Clock Source
Possible Settings: DSX-1, Internal
Default Setting: Internal
Specifies where the unit derives its timing from.
T
Primary Clock Source is available only when the unit is configured as an LTU.
Internal – The clock source is derived from the internal oscillator.
DSX-1 – The clock source is derived from the DSX-1 interface.
December 2001 7900-A2-GB21-20