Yealink SIP-T2 SERIES Administrator's Manual page 337

Parameters
Account->SIP IP Call->Allow IP Call
Phone User Interface:
For SIP-T48G/T46G/T42G/T41P/T40P/T29G/T27P/T23P/T23G/T21(P) E2/T19(P) E2/CP860:
None
For SIP VP-T49G:
Menu->Advanced (default password: admin) ->VC Accounts->SIP IP Call->Allow IP
Call
To configure allow IP call feature via web user interface (take SIP-T23G IP phones for
example):
1. Click on Features->General Information.
2. Select the desired value from the pull-down list of Allow IP Call.
3. Click Confirm to accept the change.
To configure allow IP call feature via web user interface (take SIP VP-T49G IP phones for
example):
1. Click on Account->SIP IP Call.
Configuring Basic Features
Permitted Values Default
315