Cisco IE-3000-8TC Administration Guide - Page 464

The phone is registered but automatically resets The phone is registered but automatically resets Problem If users report that their phones are resetting during calls or while idle on their desks, investigate the cause. If the network connection and Cisco Business Edition 3000 connection are stable, a phone should not reset on its own. Typically, a phone resets if it has problems connecting to the Ethernet network or to the Cisco Business Edition 3000 server. The phone resets when it loses contact with the Cisco Business Edition 3000 software. This lost connection can be due to any network connectivity disruption, including cable breaks, switch outages, and switch reboots. Solution Perform any of the following tasks: • Verify that the Ethernet connection to which the phone is connected is up. For example, check whether the particular port or switch to which the phone is connected is down and that the switch is not rebooting. Also make sure that there are no cable breaks. • Intermittent network outages affect data and voice traffic differently. Your network might have been experiencing intermittent outages without detection. If so, data traffic can resend lost packets and verify that packets are received and transmitted. However, voice traffic cannot recapture lost packets. Rather than retransmitting a lost network connection, the phone resets and attempts to reconnect its network connection. If you are experiencing problems with the voice network, you should investigate whether an existing problem is simply being exposed. • If you are using DHCP, verify whether the DHCP server is set up appropriately. Verify whether the phone is obtaining an IP address from the DHCP server. • If the phone uses a static IP address, verify that you entered the IP address correctly on the phone. The phone has one-way audio Problem When at least one person in a call does not receive audio, IP connectivity between phones is not established. Solution Check the configurations in routers and switches to ensure that IP connectivity is properly configured. A phone call cannot be established Problem The phone does not have an IP address from the DHCP, or for some reason, it is unable to register to Cisco Business Edition 3000. Solution Perform any of the following tasks: • Verify that the Ethernet cable is attached. • Verify whether a critical service has failed to start. The Health Summary page identifies when a critical service is down. • Verify that both phones are registered. (Select Users/Phones > Phones, or locate the phone and view the status messages.) Administration Guide for Cisco Business Edition 3000, Release 8.6(4) 444 OL-27022-01