Cisco Unified Communications Manager Phone Registration; Cisco Unified Ip Conference Phone 8831 Cannot Obtain Ip Address; Cisco Unified Ip Conference Phone 8831 Resets Unexpectedly - Cisco 8831 Administration Manual

Cisco Unified IP Conference Phone 8831 cannot obtain IP address

Solution
Create a new configuration file. See

Cisco Unified Communications Manager phone registration

Problem
The conference phone is not registered with the Cisco Unified Communications Manager.
Solution
A conference phone can register with a Cisco Unified Communications Manager server only if the conference
phone has been added to the server or if autoregistration is enabled. Review the information and procedures
in the
phone has been added to Cisco Unified Communications Manager.
To verify that the conference phone is in the Cisco Unified Communications Manager database, choose Device
> Phone from Cisco Unified Communications Manager Administration and search for the conference phone
based on its MAC Address. For information about determining a MAC address, see the
Phone MAC address determination
If the conference phone is already in the Cisco Unified Communications Manager database, its configuration
file may be damaged. See the
Cisco Unified IP Conference Phone 8831 cannot obtain IP address
Problem
If a phone cannot obtain an IP address when it starts up, the phone may not be on the same network or VLAN
as the DHCP server, or the switch port to which the conference phone is connected may be disabled.
Solution
Ensure that the network or VLAN to which the phone connects has access to the DHCP server, and ensure
that the switch port is enabled.

Cisco Unified IP Conference Phone 8831 resets unexpectedly

If users report that their phones are resetting during calls or while idle on their desk, you should investigate
the cause. If the network connection and Cisco Unified Communications Manager 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 Cisco Unified
Communications Manager. These sections can help you identify the cause of a phone resetting in your network:
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Cisco Unified IP Conference Phone 8831 Administration Guide for Cisco Unified Communications Manager
9.0
126
Cisco Unified Communications Manager IP Phone addition methods
Configuration file corruption
Physical connection problems, on page 127
Intermittent network outages, on page 127
DHCP setting errors, on page 127
Static IP address setting errors, on page 127
Create new phone configuration
section.
section for assistance.
Troubleshooting and maintenance
file.
section to ensure that the conference
Cisco Unified IP