AASTRA 6700i series, 9143, 9480i, 9480i CT SIP Administrator Guide EN - Manual (Page 722)

41-001343-01 Rev 03, Release 3.2.2 9-19
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 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 auto-assigns 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 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.
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.