What it does
MMTel Communication Waiting (CW) is a service that alerts the subscriber when a new call arrives while a call is already in progress. The called party can accept, ignore, or reject the call. If accepted, the existing call can be put on hold.
This service can also play an announcement to the caller. See Announcements.
Interactions with other services
Call barring
The MMTel call barring services always take precedence over call waiting. If an incoming call is barred, the call will be terminated without waiting. See Call barring.
Communications Diversion (CDIV)
The MMTel CDIV takes precedence over communication waiting. If the called subscriber is already on a call, the call will be forwarded without waiting. See Communications Diversion (CDIV).
Configuration
The example for sentinel-volte-gsm-config.yaml and
example for sentinel-volte-cdma-config.yaml show example configuration
relevant to call waiting in the sentinel-volte/mmtel/communication-waiting section.
What you need
-
❏ The ID of the announcement to play to the caller.
-
❏ The time in seconds to give the called party to answer the call before giving up and tearing down the call.
Setting up call waiting
I want to…
Play an announcement to the caller that the call is waiting
Call waiting configuration only needs the announcement ID of the announcement to be played. The details of that announcement should be configured beforehand. For details about how to do this, see Announcements.
-
If it is not already present, add an
announcementsection directly undercommunication-waiting.
communication-waiting:
announcement:-
In the
announcementsection, set theannouncement-idto the ID for the desired announcement:
announcement-id: 24Change the number of seconds to give the called party to answer the call
In the communication-waiting section,
set timer-seconds to the desired limit:
timer-seconds: 30