Yealink SIP-T38G, Administrator'S Manual

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Configuring Basic Features
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3. Select the desired value from the pull-down list of Auto Answer.
4. Click Confirm to accept the change.
To configure auto answer via phone user interface:
1. Press Menu->Settings->Advanced Settings (password: admin) ->Accounts.
2. Select the desired account and then press the Enter soft key.
3. Press or , or the Switch soft key to select the desired value from the Auto
Answer field.
4. Press the Save soft key to accept the change.
When a call fails, the call completion feature allows notifying the caller when the callee
becomes available to receive a call. There are several possible factors which can
prevent a call from connecting successfully.

Callee does not answer

Callee actively rejects the incoming call before answering
The IP phones support call completion using the SUBSCRIBE/NOTIFY method, which is
specified in draft-poetzl-sipping-call-completion-00, to subscribe to and manage a call
completion call and to receive notifications of status changes of the call.