MP-40x SIP MediaPack BRI Series
SIP User's Manual
152
Document #: LTRT-53301
A.4.4
Call Waiting / Call Queued
A.4.4.1 ISDN-to-SIP Call Queued by the SIP User
In this scenario, the MediaPack receives a 182 Call Queued instead of an alerting
message. If the MediaPack receives a call queued, the MediaPack plays the Queued tone
to the ISDN user instead of the alerting tone.
For this scenario no configuration is required.
Figure
A-14: ISDN-to-SIP Call is Queued by the SIP User
Sip Phone
SIP INVITE
MP-40x
ISDN Phone
ISDN Setup
182 Queued
200 OK
AL Queued Tone
CONNECT
A.4.4.2 Call Waiting SIP-to-ISDN Calls
If Hunting is disabled (refer to Section '
1112H1167H
LineHunting Logic
' on page
1113H1168H
81
), the MediaPack
sends a third setup to the ISDN port. Simultaneously, the MediaPack responds with a 182
Queued instead of a 180 Alerting. The ISDN user may choose to put the current call on
hold and accept the additional call.
If Hunting is enabled, the MediaPack searches for an available ISDN port. If no available
ISDN port is located, the call fails.
The configuration for Call Waiting is implicit (given by Hunt Logic). No additional
configuration is required or possible.
Figure
A-15: Call Waiting SIP-to-ISDN Calls
Sip Phone
SIP INVITE
MP-40x
ISDN Phone
182 Queued
SETUP
ISDN Phone
Active Call 1
Active Call 2
HOLD Call 1
CONNECT new Call
200 OK
