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Caller ID on Cisco 2600 and 3600 Series Routers and Cisco MC3810 Multiservice Concentrators
Caller ID Configuration Task List
Troubleshooting Tips
If you have
•Try a different brand of phone to confirm that the problem is not caused by a malfunctioning or incompatible caller ID telephone.
•Ensure that the cptone command is set correctly to reflect your locale.
•If the call time display is incorrect, check the router clock setting. An NTP network time server is recommended for accurate display of the local time.
•If expected information is not displayed, use the show call history command to make sure that the information that the router received during the call setup is complete.
•The line voltage available on FXS voice ports of the Cisco MC3810 multiservice concentrator and Cisco 2600 and 3600 series routers is
If you have
•Disconnect the router from the phone line and attach a
–Listen and watch to see when the
–Make sure that the router configuration matches the timing of the display. If the phone is answered during the first ring, does this cause the phone not to display the
•Use the show call history command to check the information received by the caller ID receiver. The following debug commands may be useful for analyzing problems:
•debug vpm signal
•debug vtsp dsp
•debug vtsp session
Note Specific hardware is required to provide full support for the Caller ID features. To determine support for these features in your configuration, review the appropriate hardware documentation and data sheets. This information is available on Cisco.com.
Cisco IOS Voice, Video, and Fax Configuration Guide