IP Server 900 Programming Manual Function 2: CO line programming
E.15
Troubleshooting
One common issue with PRI on ESI’s PRI-compatible systems is the failure of incoming or outgoing calls
over PRI to connect or display Caller ID. The following discussion, derived from Technical Update 164
(ESI # 0450-0462, downloadable from www.esi-estech.com), discusses methods to address this:
1. ESI has found that many PRI circuits have been set in Function 2134 to a switch protocol
that’s incompatible with the PRI provider.
ESI recommends that, regardless of the make and model of the CO or IXC switch that’s
providing the PRI, you first set the default switch protocol (NI2). If the PRI doesn’t function
properly using the NI2 protocol, then select the appropriate switch option for the make and
model of the provider’s equipment.
Note: Always complete programming in any function before exiting programming mode (#
through all of the Function parameters).
2. ESI has also determined that, after you change the PRI switch protocol programming,
you also MUST power-cycle the system in order to correctly synchronize the PRI with the
service provider’s switch.
Important: Before power-cycling the system, wait at least four (4) full minutes after you complete
programming.
After power-cycling the system, wait until the appropriate T1/PRI Module is on-line — i.e., its
Status LED is no longer flashing. Note the time when the PRI came on-line. Make several
outgoing and incoming calls via the PRI to insure that it’s working properly. If the PRI appears to
be functioning properly, contact the carrier and verify that no errors have occurred since the time
when the PRI came on-line. If the carrier reports errors or if incoming or outgoing calls aren’t
functioning properly, select a different switch option in Function 2134 and power-cycle the
system again (and then, again, wait at least four full minutes before exiting programming).
3. Set Function 166, parameter 2 (ARS inter-digit timer) to between 500 and 600 (i.e., between
five and six seconds). This will set the timeout that occurs after the first digit has been dialed
when making an outgoing call over the PRI, so that it’s long enough to allow the entire entered
number to be accepted. The ARS inter-digit timer value is expressed in
1
/100 seconds.
Range: 40–1,000 (i.e., 400 ms to 10 seconds).
4. Contact ESI Technical Support at 800 491-3609 and request that the PRI error counters
be cleared.
Function 2135: DID
With DID enabled, call processing will check first the pilot number table and then the DID table, and route the
call accordingly. Any number not found in the pilot number or DID tables (programmed in Functions 224
and 225) will be routed to the DID exception routing. With DID disabled, all calls will follow the routing as
programmed in PRI CO line programming (Function 2131).
Default: Disabled.
To Next Page
Loading...
