D-Link DPH-80 Manual page 58

Using Session Initiated Protocol (SIP)
SIP Troubleshooting
Other Functions
The factory default key sequence is entered, but there is no response.
You must restart the phone.
The production test key sequence is entered, but there is no response.
You must restart the phone. The SIP phone will exit the production test mode
on the next restart.
The remote upgrade key sequence is entered, but there is no response.
You must have the software files in the TFTP server and the SIP phone should
be configured with the correct TFTP server and file names.
The remote upgrade key sequence is entered, and the phone plays an
unidentified tone.
The SIP phone plays a tone during the software download. The SIP phone will
restart upon successful download.
There is a power out during the remote upgrade.
If anything goes wrong during the software upgrade, the phone will use the
previous existing software.
SIP Production Test
This section describes the production test supported by the D-Link SIP phone.
The main hardware blocks to be tested are (i) LED, (ii) Key Scan, (iii) Hook
Switch, (iv) Codec & Handset, (v) Speaker, (vi) Memory and (vii) Ethernet MAC
and PHY. If a test is successful, the SIP phone will play a Success tone and
turn on the Green LED. If a test fails, it will play an Error tone and turn on the
Red LEDs. After each test, press '1' to continue on to the next test and '0' to
repeat the test.
Note: In some tests the SIP phone cannot determine the outcome of the test and
the user must verify it. In such test cases the phone will not play any tone.
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