Cisco Systems ATA187I1ARF Manual Do Utilizador

If you have additional questions about troubleshooting the ATA 187, several Cisco.com web sites can 
provide you with more tips. Choose from the sites available for your access level.

ATA 187 Troubleshooting Resources:

Loopback condition

A loopback condition can occur when the following conditions are 
met:

The SW Port Configuration option in the Network 
Configuration menu on the phone is set to 10 Half



(10-BaseT/half duplex)

The phone receives power from an external power supply

The phone is powered down (the power supply is disconnected)

In this case, the switch port on the phone can become disabled and 
the following message will appear in the switch console log:

HALF_DUX_COLLISION_EXCEED_THRESHOLD

To resolve this problem, re-enable the port from the switch.

One-way audio

When at least one person in a call does not receive audio, IP 
connectivity between phones is not established. Check the 
configurations in routers and switches to ensure that IP connectivity 
is properly configures.

Peer to peer image distribution 
fails.

If the peer to peer image distribution fails, the phone will default to 
using the TFTP server to download firmware. Access the log 
messages stored on the remote logging machine to help debug the 
peer to peer image distribution feature. 

These log messages are different than the log messages sent 
to the phone log.

Phone call cannot be established  The phone does not have a DHCP IP address, is unable to register to 

Cisco Unified Communications Manager, and shows a Configuring 
IP or Registering message.

Verify the following:

The Ethernet cable is attached.

The Cisco CallManager service is running on the Cisco Unified 
Communications Manager server.

Both phones are registered to the same Cisco Unified 
Communications Manager.

Audio server debug and capture logs are enabled for both 
phones. If needed, enable Java debug.