Yealink SIP-T48G Administrator's Manual page 238

Administrator's Guide for SIP-T2_Series_T4_Series IP Phones
5) Select the ring time to wait before forwarding from the pull-down list of After
Ring Time (0~120s) (only for the no answer forward).
3. Click Confirm to accept the change.
To configure Diversion/History-Info feature via web user interface:
1. Click on Features->General Information.
2. Select the desired value from the pull-down list of Diversion/History-Info.
3. Click Confirm to accept the change.
To configure forward international via web user interface:
1. Click on Features->General Information.
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