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8-3
Cisco ATA 186 and Cisco ATA 188 Analog Telephone Adaptor Administrator’s Guide (SCCP)
OL-3141-01
Chapter 8 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.
Installation and Upgrade Issues
Symptom The red LED is flashing slowly on the function button.
Possible Cause The Cisco ATA 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.
Symptom Voice prompt returns Upgrade not available message. This can only occur if you are using the
executable-file upgrade method.
Possible Cause You are attempting to upgrade to the existing version.
Recommended Action You do not need to upgrade.
Symptom After you upgrade the Cisco ATA to a new signaling image, you receive an incorrect "Not
Registered" status from the Cisco CallManager.
Possible Cause The Cisco CallManager is unable to properly process the registration change after the
Cisco ATA upgrades its image from a version prior to the ata186-v2-15-ms-020911b image.
Recommended Action Follow the procedure in the “Restarting the Cisco CallManager” section on
page 8-4.