Aastra VentureIP 480i, Administrator'S Manual

Page: 103 / 174

96 IP Phone SIP Admin Guide
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6. Enter the IP 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.