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DEFINITY ECS Release 8.2 ATM Installation,
Upgrades, and Administration
555-233-124
Issue 1
April 2000
Installing a DEFINITY ECS ATM-PNC
3-24Synchronization Installation and Testing
3
Use the procedures in Table 3-11 to test the 120A ICSU with the 700A DS1 CPE
loopback jack.
Connected through a DSU/CSU.
Before connecting any of the timing hardware,
ensure that the DSU/CSU is configured to report loss of signal alarms.
If using a 316X CSU connected to a T1 facility and used as the DEFINITY
synchronization source, verify or change the 316X settings (options) to ensure
that it sends an AIS blue alarm to the DEFINITY ECS DS1 circuit pack or to the
ATM switch whenever a network LOS (loss of signal) occurs. Upon receiving a
LOS, the DEFINITY ECS or ATM switch transfers to its backup synchronization
source.
Table 3-11. Testing the 120A 2 ICSU
√
Step Action Command Description
1. Busyout the
DS1 circuit pack
busyout board
UUCSS
Busyout the DS1 circuit pack.
2. Start the CPE
loopback test
test ds1-loop
UUCSS
cpe-loopback-
jack-test-begin
Start the CPE loopback test.
■ If the test passes, the splitter is functioning
properly; go to Step 3.
■ If the test fails, follow the procedures in
‘‘Troubleshooting synchronization (400A
only)’’ on page 6-17.
3. Terminate the
test
test ds1-loop
UUCSS
end-loopback/
span-test
Terminate the test .
4. Release the
DS1 circuit pack
release board
UUCSS
Release the DS1 circuit pack .
5. Reassign
synchronization
change
synchronization
Reassign sync to the designated DS1 circuit pack .
Continued on next page