User Guide

Multi-Level Precedence and Preemption
357
Call Origination Busy
When Call Origination Busy is enabled, incoming calls are prevented from
disturbing you when you are in the process of making an outbound call.
When your IP Deskphone is on-hook or off-hook and you enter the first
digit or character, then any call that comes in during the entry sequence is
not presented to you.
Incoming calls are shown when you cancel the outbound call by pressing
Goodbye, or when you place the receiver on-hook and the IP Deskphone
goes back to the idle state.
If you place an outbound call, and that outbound call rings or receives a
busy signal, any incoming call that was not presented is then presented.
Note: The outgoing call cannot be preempted by any call until the
outgoing call rings or receives a busy signal.
The following sections describe Call Origination Busy behavior in various
scenarios.
An outgoing call is
ringing 1. The preemption tone plays continuously
in the Handsfree speaker for few
seconds.
2. The preemption acknowledgment screen
is displayed. See Figure 86, "Preemption
acknowledgement screen", on page 355.
3. When the preemption is acknowledged
or after three seconds elapse, the
preemption tone stops.
Table 21: When a preemption call is received from an
external source
Call state Preemption behavior