Cisco Systems ATA187I1ARF manual Where to Go for More Troubleshooting Information

Chapter 6 Troubleshooting and Maintenance

Where to Go for More Troubleshooting Information

Table 6-2	ATA 187 Troubleshooting (continued)
Summary		Explanation
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		If the peer to peer image distribution fails, the phone will default to
fails.		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.
		Note 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:
		1. The Ethernet cable is attached.
		2. The Cisco CallManager service is running on the Cisco Unified
		Communications Manager server.
		3. Both phones are registered to the same Cisco Unified
		Communications Manager.
		4. Audio server debug and capture logs are enabled for both
		phones. If needed, enable Java debug.

Where to Go for More Troubleshooting Information

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: http://www.cisco.com/en/US/products/hw/gatecont/ps514/tsd_products_support_series_home.html

Cisco Unified IP Phone Administration Guide for Cisco Unified Communications Manager 8.0

OL-21035-01 6-9