Tiptel 31XX IP Phone Configuration Guide
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6. Next, we need to configure the audio codecs. Click on the "Account/Codec" tab.
Ensure that the "Enable codecs" list box contains first "G722", then "PCMU", and
finally "PCMA". Click the "Confirm" button at the bottom of the page.
Figure 1-3
7. We also need to configure the phone to subscribe for MWI notifications. Click on
the "Account/Advanced" tab:
1) Set the "Subscribe MWI" field to "Enabled"
2) Click the "Confirm" button at the bottom of the page
Figure 1-4