Registering The Phone With Cisco Unified Callmanager; Symptom: Cisco Unified Ip Phone Unable To Obtain Ip Address - Cisco 7970G Administration Manual

Resolving Startup Problems

Registering the Phone with Cisco Unified CallManager

Symptom: Cisco Unified IP Phone Unable to Obtain IP Address

Cisco Unified IP Phone Administration Guide for Cisco Unified CallManager 5.1 (SIP), Cisco Unified IP Phones
9-8
Changing the buttons on a phone button template, or assigning a different
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phone button template to a phone, may result in directory numbers that are no
longer accessible from the phone. The directory numbers are still assigned to
the phone in the Cisco Unified CallManager database, but there is no button
on the phone with which calls can be answered. These directory numbers
should be removed from the phone and deleted if necessary.
A Cisco Unified IP Phone can register with a Cisco Unified CallManager server
only if the phone has been added to the server or if auto-registration is enabled.
Review the information and procedures in the
Unified CallManager Database" section on page 2-13
been added to the Cisco Unified CallManager database.
To verify that the phone is in the Cisco Unified CallManager database, choose
Device > Find from Cisco Unified CallManager Administration to search for the
phone based on its MAC Address. For information about determining a MAC
address, see the "Determining the MAC Address of a Cisco Unified IP Phone"
section on page 2-20.
If the phone is already in the Cisco Unified CallManager database, its
configuration file may be damaged. See the
section on page 9-7 for assistance.
If a phone is unable to obtain an IP address when it starts up, the phone may be
not be on the same network or VLAN as the DHCP server, or the switch port to
which the phone is connected may be disabled.
Make sure that the network or VLAN to which the phone is connected has access
to the DHCP server, and make sure that the switch port is enabled.
Chapter 9 Troubleshooting and Maintenance
"Adding Phones to the Cisco
to ensure that the phone has
"Creating a New Configuration File"
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