Co Trunk Issues - Inter-Tel AXXESS Manual

Table 7-7. CO Trunk Troubleshooting Chart (Continued)
Symptom
(Continued) Low volume on
all CO trunks; cannot break
CO dial tone
Cannot break CO dial tone
Cannot place an outgoing
call; CO dial tone is
present; intercom works

CO Trunk Issues

INTER-TEL
Possible Cause
Open or loose connection in
the cable between the power
supply and the backplane
Defective power supply
Hybrid balance mismatch
NOTE:
See also phone problems on
CO circuit is programmed for
wrong signaling type
Defective CO trunk from cen-
tral office
Timer error
Defective trunk card
Defective CPC or CPU Card
NOTE:
See also phone problems on
Programming error
Defective CO trunk from cen-
tral office
Defective station instrument
Selected trunk is designated
as incoming-only
Defective trunk card
Defective CPC or CPU Card
® ®
AXXESS MANUAL VERSION 11.0 – May 2008
Corrective Action
If, with all trunk cards removed, the system volt
ages are still not within tolerance, turn off the sys-
tem and check the cable and connector with an
ohmmeter. Replace or repair the faulty cable.
With all trunk cards removed, measure the system
voltages. If not within tolerance, replace the power
supply.
Select the balance network – normal or short – that
best matches the trunk's impedance. See PRO-
GRAMMING, page 6-244.
page 7-43.
Ensure that CO trunk and CO circuit use same type
signaling (DTMF or dial pulse). See PROGRAM-
MING, page 6-244.
At the CO block, remove the bridging clips for the
trunk. On the telco side of the block, use a test set
to verify the CO trunk connection. Also, move the
CO trunk to a known good CO circuit. If the problem
follows the trunk, contact the telephone company.
If trunk is DTMF, the DTMF Digit Duration/ Pause
timer setting may not be compatible with the trunk.
See PROGRAMMING, page
Replace the associated trunk card.
See page 7-3 for LED and system voltage informa-
tion. Replace the card if faulty.
page 7-43.
Check station class of service (COS). See PRO-
GRAMMING, page 6-198. Check that equal access
and absorbed digit programming for the trunk group
are correct. See PROGRAMMING,
using ARS, check ARS programming on
in PROGRAMMING.
At the CO block, remove the bridging clips for the
trunk. On the telco side of the block, use a test set
to verify the CO trunk connection. Also, move the
CO trunk to a known good CO circuit. If the problem
follows the trunk, contact the telephone company.
Replace the station instrument and/or perform the
keyset self-test as outlined in INSTALLATION,
page 3-182.
Cannot dial out on an incoming-only trunk.
Replace the associated trunk card.
See page 7-3 for LED and system voltage informa-
tion. Replace the card if faulty.
Troubleshooting
6-329.
page 6-244. If
page 6-291
Page 7-33
7