Troubleshooting Solutions; Why Does My Phone Display "Application Missing; Why Does My Phone Display The "No Service" Message - Aastra 480i Administrator's Manual

Troubleshooting Solutions

This section describes solutions
to some most common problems
that can occur.
Why does my phone display
"Application missing"?
If you have experienced
networking issues while the phone
was downloading the application
from the TFTP server, it is possible
that the phone can no longer
retrieve the required firmware file.
In the event that the phone is no
longer able to communicate with
the TFTP server in its attempt to
re-download the firmware and the
phone cannot locate the
application locally, the message
"Application missing" displays.
The phone also displays the
following: "Recovery web-client at:
<IP Address>". The IP Address
displayed is the IP address of the
phone. If the phone is unable to
receive an IP from the DHCP
server or has lost its record of its
static IP, the phone will auto-
assign itself
the default IP 192.168.0.50.
To recover the firmware for your
phone in this circumstance, please
perform the following:
1. Launch your web browser on
your computer.
Note: Your computer will need to be
on the same network as your
IP phone.
2. In the URL, type: "http://<IP
Address>" (where IP Address is
the IP Address displayed on
the phone). Your browser will
launch the Aastra IP Phone
Firmware Recovery page.
3. Call Customer Support and
request a <phone model>.bin.gz
file.
4. Copy the file to your TFTP
server.
5. Enter the <phone model>.bin.gz
file that is ready for download.
6. Enter the IP address or qualified
domain name of the TFTP
server.
7. Press the Download Firmware
button.
Please ensure that the TFTP server
is running and accessible on the
network. If the firmware file is
correctly located on the running
TFTP server, the phone will locate
the file and reload the application
onto the phone.
Why does my phone display
the "No Service" message?
The phone displays the
"No Service" message if the SIP
settings have not been set up
correctly.
The Registrar server could be set to
0.0.0.0. A global value of 0.0.0.0
disables registration. However, the
phone is still active and you can
dial using username@ip address of
the phone. The phone displays
"No Service".
If the Registrar IP address is set to
0.0.0.0 for a per-line basis (i.e, line
1, line 2, etc.), then the register
request is not sent, the "No
Service" message does not display,
and the message waiting indicator
(MWI) does not come on.
Check that the "Registrar Server"
IP address in the Aastra Web UI at
Advanced Settings->Global SIP is
correct. Check the "sip registrar
ip" parameter in the configuration
files is correct.
IP Phone SIP Admin Guide 181