Version 5.2/5.4 39 January 2009
Troubleshooting Guide 5. Caller ID
5 Caller ID
This section discusses troubleshooting for caller ID:
''Why Doesn't the FXO Device Detect Caller ID'' on page 39
''Why Doe
sn't the Phone Detect Caller ID (FXS)'' on page 40
''Why Doe
sn't Digital Device Detect Tel-to-IP Caller ID'' on page 41
''Why Doe
sn't Digital Device Generate Caller ID to Tel'' on page 42
5.1 Why Doesn't the FXO Device Detect Caller ID
The troubleshooting information below is relevant to FXO devices that do not detect the
Caller ID signal that is sent by the PBX (i.e. Tel-to-IP calls).
Table 5-1: PBX Caller ID not Detected by FXO Device Troubleshooting
Possible Cause Solution
1.
Caller ID is not enabled on the
device.
Verify that the parameter EnableCallerID is set to 1.
2.
The Caller ID standard of the
device and the PBX are not the
same.
Verify that the caller ID standard (and substandard) of the
device match the standard (and substandard) of the
PBX/Tel, using the following ini file parameters:
CallerIDType
BellcoreCallerIDTypeOneSubStandard
ETSICallerIDTypeOneSubStandard
3.
The DC offset from the PBX
prevents Caller ID detection.
Enable DC removal option, by setting the ini file parameter
ECDCRemoval to 1 (using the Web interface's AdminPage).
Note: The device must be reset for this setting to take effect.
4.
Caller ID Transfer type is not
configured to mute.
Verify that the parameter CallerIDTransportType is set to
default (i.e., 3 or "Mute" in the Web interface's
'Fax/Modem/CID Settings' page - Web path SW Ver. 5.2:
Advanced Configuration menu > Media Settings menu >
Fax/Modem/CID Settings; Web path SW Ver. 5.4 and later:
Configuration tab > Media Settings menu > Fax/Modem/CID
Settings).
5.
Distorted Caller ID signal due to
incorrect line characteristics.
If the caller ID signal is distorted, the device does not
recognize it. Verify that the correct line characteristics are
used (using the ini file parameter CountryCoefficients).
6.
Number of rings before device
begins detecting Caller ID signal
is not configured.
Configure the number of rings (using the ini file parameter
RingsBeforeCallerID) before the device starts detection of
caller ID. Typically, the Caller ID signals are detected
between the first and second rings. However, sometimes the
Caller ID is detected before the first ring signal (in such a
scenario, set the ini file parameter RingsBeforeCallerID to 0).
Note: The number of rings before sending Caller ID is
determined by the PBX providing the analog line.
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