Cisco 8821

Check DHCP Settings
Procedure
Step 1
On the phone, access the Settings app.
Step 2
Select Wi-Fi, select the active profile, then select Network configuration > IPv4 setup, and look at the
DHCP field:
•
If DHCP is on, then the phone is assigned the settings from the DHCP server.
•
If DHCP is off, then you must configure a static IP Address, and set the Subnet Mask, Default Router,
and DNS server 1 fields.
Step 3
If you are using DHCP, check the IP addresses that your DHCP server distributes.
See the Understanding and Troubleshooting DHCP in Catalyst Switch or Enterprise Networks document,
available at this URL:
http://www.cisco.com/en/US/tech/tk648/tk361/technologies_tech_note09186a00800f0804.shtml
Create New Phone Configuration File
Note
•
When you remove a phone from the Cisco Unified Communications Manager database, the
configuration file is deleted from the Cisco Unified Communications Manager TFTP server. The
phone directory number or numbers remain in the Cisco Unified Communications Manager database.
They are called unassigned DNs and can be used for other devices. If unassigned DNs are not used
by other devices, delete these DNs from the Cisco Unified Communications Manager database. You
can use the Route Plan Report to view and delete unassigned reference numbers. For more information,
see the documentation for your particular Cisco Unified Communications Manager release.
•
Changing the buttons on a phone button template, or assigning a different 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 Communications Manager database,
but the phone has no button on the phone with which calls can be answered. These directory numbers
should be removed from the phone and deleted if necessary.
Procedure
Step 1
From Cisco Unified Communications Manager, choose Device > Phone and click Find to locate the phone
that is experiencing problems.
Step 2
Choose Delete to remove the phone from the Cisco Unified Communications Manager database.
Cisco Wireless IP Phone 8821 and 8821-EX Administration Guide for Cisco Unified Communications Manager
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Troubleshooting
Check DHCP Settings