Yealink SIP-T28P - Manual (Page 98)

User Guide for the SIP-T28P IP Phone
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Multiple Calls on Hold:
If multiple calls are placed on hold, do one of the following:
- Press or to switch between the calls, and then press the Resume soft key to
retrieve the desired call.
- Press the corresponding line key to retrieve the desired call.
A numbered prompt appears on the LCD screen, for example "2/4", indicating that this is
the second call out of four calls.
You can use DND to reject incoming calls automatically on the phone. Callers will
receive a busy message.
You can enable/disable DND for the phone system, or you can customize DND for each
or all accounts. Two DND modes:

Phone (default): DND is effective for the phone system.

Custom: DND can be configured for each or all accounts.
You can receive incoming calls from authorized numbers when DND is enabled.
To configure the DND mode via web user interface:
1. Click on Features->Forward & DND.
2. In the DND block, mark the desired radio box in the Mode field.