Yealink SIP-T19 - Manual (Page 70)

User Guide for the SIP-T19P/SIP-T19 IP Phone
60
2. Enter the desired number in the Number field.
3. Enter the delay time (in seconds) in the Hotline Time-out field.
The valid values range from 0 to 10.
4. Press the Save soft key to accept the change or the Back soft key to cancel.
Hotline is configurable via web user interface at the path Features->General
Information.