Yealink SIP VP-T49G User Manual page 186

User Guide for SIP VP-T49G IP Phone
Enter the desired number of redial attempts in the Redial Times field.
4.
The default value is "10".
Tap the Save soft key to accept the change or
5.
Auto redial is configurable via web user interface at the path Features->General Information.
To use auto redial:
When the called party is busy, the touch screen prompts the following:
Tap OK to activate auto redial.
1.
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to cancel.