Phone Cannot Connect To Tftp Server Or To Cisco Unified Communications Manager - Cisco 7925G Administration Manual

Troubleshooting
from Cisco Unified Communications Manager Administration to search for the phone based on its MAC
Address. To determine the MAC address of a phone, see
If the phone is already entered in the Cisco Unified Communications Manager database, its configuration file
may be damaged. See

Phone Cannot Connect to TFTP Server or to Cisco Unified Communications Manager

Problem
If the network is down between the phone and either the TFTP server or Cisco Unified Communications
Manager, the phone cannot start up properly.
Solution
Ensure that the network is currently running.
TFTP Server Settings
Problem
The TFTP server setting on the phone is incorrect.
Cause
The Cisco Unified Wireless IP Phone uses the TFTP server setting to identify the primary TFTP server to
use. If the TFTP server does not respond to the request, then the Communications Manager1 (CM1) shows
as TFTP_AS_CM if the phone has not registered with Cisco Unified Communications Manager before.
If the phone has previously registered with Cisco Unified Communications Manager, the Cisco Unified
Note
Communications Manager list information is cached in memory. If TFTP fails, you must power cycle the
phone to connect to the TFTP server.
The phone tries to create a TCP connection to the TFTP IP address and then to the gateway. If
Cisco Unified Communications Manager service is not running on the TFTP server, or if SRST is not running
on the gateway, the wireless IP phone may continually cycle while attempting to contact the identified
TFTP server.
The Cisco Unified Wireless IP Phone does not cache the IP information passed from the DHCP server, so the
TFTP request must be sent and responded to every time the phone power cycles.
Solution
If you have assigned a static IP address to the phone, you must manually enter this setting. See
Settings, on page
If you are using DHCP, the phone obtains the address for the TFTP server from the DHCP server. Check the
IP address configured in the DHCP server.
You can also enable the phone to use a static TFTP server. Such a setting is particularly useful if the phone
was recently moved from one location to another.
Phone Does Not Register with Cisco Unified Communications Manager
Configuration File Corruption, on page 215
92.
Cisco Unified Wireless IP Phone 7925G, 7925G-EX, and 7926G Administration Guide
Device Information, on page
for assistance.
179.
IP Network
213