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Cisco ATA 186 and Cisco ATA 188 Analog Telephone Adaptor Administrator’s Guide for MGCP (version 3.0)
OL-4803-01
Chapter 8 Troubleshooting
Installation and Upgrade Issues
Symptom The Cisco ATA contacts the TFTP server more often than specified in the CfgInterval
parameter.
Possible Cause The ToConfig parameter is not set to 0.
Recommended Action After the Cisco ATA has a valid configuration file, the ToConfig parameter
must be set to 0. If it is not set to 0, the Cisco ATA will attempt to contact the TFTP server too
frequently.
Symptom Cannot place call.
Possible Cause Equipment failure on the network.
Recommended Action Replace defective network equipment.
Possible Cause Recipient has not registered the IP phone.
Recommended Action Register the IP phone.
Possible Cause Ethernet cable is not connected.
Recommended Action Make sure that all cables are connected.
Symptom Fast busy tone.
Possible Cause Authentication credential is incorrect.
Recommended Action Verify authentication credential, and revise if necessary.
Possible Cause Recipient has not registered the IP phone.
Recommended Action Register the IP phone.
Possible Cause No common codec between the Cisco ATA and remote end.
Recommended Action Change codec to one that is common with the Cisco ATA and the remote end.
Possible Cause Recipient is in a call with call waiting disabled.
Recommended Action Attempt to place the call at a later time.
Installation and Upgrade Issues
Note The following issues apply to the manual image-upgrade process only. Image upgrades must be
performed separately.