Chapter 9 Troubleshooting the Cisco Wireless IP Phone 7920
Resolving Startup and Connectivity Problems
9-6
Cisco Wireless IP Phone 7920 Administration Guide for Cisco CallManager Release 4.0 and 4.1
OL-7104-01
To verify that the phone is in the Cisco CallManager database, choose
Device >
Phone > Find
from Cisco CallManager Administration to search for the phone
based on its MAC Address. (To determine the MAC address of a phone, see the
“Viewing the Media Access Control Address” section on page 6-5
.)
If the phone is already in the Cisco CallManager database, its configuration file
may be damaged. See the
“Creating a New Configuration File” section on
page 9-10
for assistance.
Checking Network Connectivity
If the network is down between the access point and the TFTP server or
Cisco CallManager, the phone cannot start up properly. Ensure that IP
connectivity exists between the WLAN and the Cisco CallManager and TFTP
servers.
Verifying TFTP Server Settings
The Cisco Wireless IP Phone 7920 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 CallManager1 (CM1) shows as TFTP_AS_CM if the phone has not
registered with Cisco CallManager before.
Note
If the phone has previously registered with Cisco CallManager, the Cisco
CallManager 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 CallManager service is not running on the TFTP server, or if
SRST is not running on the gateway, the Cisco Wireless IP Phone may continually
cycle while attempting to contact the identified TFTP server.
The Cisco Wireless IP Phone 7920 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.
If you have assigned a static IP address to the phone, you must manually enter this
setting. See the
“Configuring Static Settings” section on page 5-6
.
Содержание 7920 - Unified Wireless IP Phone VoIP
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