Specifications

X723-300151 5-17 Issue 2
be set greater than the change over delay by the amount of hold
period that is required.
Time delays are selectable between 0 and 25 seconds in steps of
100ms.
iv) Dual management path
When this facility is enabled, management data will operate as in
terminal mode e.g.
i) TS0 data from line 1 will be written to line 1 patchfield.
ii) TS0 data from line 2 will be written to line 2 patchfield.
iii) Data read from line 1 patchfield will be written to line 1 TS0.
iv) Data read from line 2 patchfield will be written to line 2 TS0.
When disabled, this facility will operate as follows:
i) Data read from the active line signal will be written to the
relevant active portion of the patchfield.
ii) Data written to the inactive portion of the patchfield will be all
1's.
iii) Data read from line 1 patchfield will be written to line 1 TS0.
iv) Data read from line 2 patchfield will be written to line 2 TS0.
v) A/B sync source tracking
This facility can be enabled or disabled.
When enabled, the sync source used from this LIU will
automatically be derived from the active line. This clock should
be selected in the multiplexer sync plan as Line 1 clock. Line 2
clock is not used.
When disabled, Line 1 and Line 2 clocks may be used as sync
sources in the multiplexer sync plan in the normal way.
Failure Conditions
The following faults are used to determine a line failure condition.
AIS
Loss of Incoming PCM
Loss of Frame alignment
Error ratio > 1 in 10
-3
TS16 AIS if set for CAS mode
Loss of Multiframe alignment if set for CAS mode
Low error rate
CRC reframe when CRC is enabled.