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Cisco ATA 186 and Cisco ATA 188 Analog Telephone Adaptor Administrator’s Guide (H.323)
OL-4008-01
Chapter9 Troubleshooting
Installation and Upgrade Issues
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 CiscoATA 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.
Symptom The red LED is flashing slowly on the function button.
Possible Cause The CiscoATA is trying to obtain the DHCP address or the software image is being
upgraded.
Possible Cause The Ethernet cable is unplugged.
Recommended Action Plug in the Ethernet cable.