Ramdomly drop calls

[phonehelp]

The BCM 400 will ramdomly drop all calls on the PRI line. On an attempt to make a call the phone error out with no free line or network unavailable .

1. The BCM 400 has 1 DTM ; 1 ASM8+ and a DSM-32 port.

2. The PRI provider has tested and even replaced the cable pair from the CO to the smart Jack.

3. I have upgrade the system from 3.5 to 3.7.


What am I overlooking? What else can I change ?

 

[biv343]

Make sure your clocking is set correctly - should be set to primary external. Typically this is caused by a fault at the CO. There were some flaky DTM's a while back, but those usually failed outright.