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Troubleshooting Solutions
41-001343-02 REV04 – 05.2014 9-12
Troubleshooting Solutions
Description
This section describes solutions to some most common problems that can occur while using the IP phones.
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 applica-
tion 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 auto-
assigns itself the default IP 192.168.0.50.
To recover the firmware for your phone in this circumstance, please perform the following:
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 it is not able to successfully register with the Registrar. If the Registrar is up
and running the SIP settings may not 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.
1. Launch your web browser on your computer.
Note:
Your computer needs 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 launches the
Aastra IP Phone Firmware Recovery page.
3. Call Customer Support and request a <phone model>.st file.
4. Copy the file to your TFTP server.
5. Enter the <phone model>.st 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.