Avaya 1120E User Manual page 173

Note:
Emergency 911 calls can be preempted when there are no available call appearances and there
is an incoming above-Routine precedence call.
IM sessions cannot be preempted because they do not count as a call appearance.
Order of call preemption
The following is the order of call preemption:
1. the lowest precedence call
2. If there are multiple calls on the same precedence level, then the following order is used:
a. any outgoing call that is unanswered
b. the oldest incoming call that is unanswered
c. the oldest held call
Preemption scenarios and behavior
The following table describes the IP Deskphone behaviors that occur when receiving a call of higher
precedence than the presented current calls and no call appearances are available.
Table 15: When a preemption call is received
Call state
While a call is on hold
An incoming call is ringing
An outgoing call is ringing
External preemption
The IP Deskphone supports preemption from external sources.
The following table describes the IP Deskphone behaviors that occur when receiving a call from an
external source with higher precedence than the presented current calls and no call appearances
are available.
May 2016
Preemption behavior
1. Preemption tone is played through the Handsfree speaker for
2. The preempting call presents with the appropriate ringing.
3. The new preemption precedence call screen is displayed.
1. The preempting call presents with the appropriate ringing.
2. The new preemption precedence call screen is displayed.
1. The preemption tone plays continuously in the Handsfree
2. The outgoing call is removed.
3. The preemption acknowledgment screen is displayed.
4. When the preemption is acknowledged, or after three seconds
Avaya 1120E IP Deskphone with SIP Software on Avaya Aura
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Multi-Level Precedence and Preemption
three seconds.
speaker for few seconds.
elapse:
a. Preemption tone stops.
b. The new preemption precedence call screen is displayed.
c. The preempting call presents with the appropriate ringing.
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User Guide 173