Auto Call Back (Acb) - Matrix Visionpro System Manual

Auto Call Back (ACB)

If the station number you have dialed is busy or is not responding, you may use the Auto Call Back feature, instead
of repeatedly dialing the number. Similarly, when you dial a code to access a trunk and the trunk is busy, you may
set Auto Call Back.
VISIONPRO offers two types of Auto Call Back as follows,
• Auto Call Back on Busy
• Auto Call Back on No Reply.
How it works
Auto Call Back on Busy (ACB-Busy)
If a station user finds the dialed station to be busy, Auto Call Back can be set by dialing the ACB command during
Busy Tone. When the dialed station becomes free, it rings. Simultaneously, the station that requested Auto Call
Back also starts ringing.
Whoever answers first gets the Ring Back Tone (RBT), whereas the other end keeps on ringing. Once the other
party answers, Ring Back Tone stops and speech is established.
If Auto Call Back ring is not answered before the expiry of the Auto Call Back Ring Timer (default: 30 seconds;
programmable), it stops and Auto Call Back request gets cleared.
Similarly, Auto Call Back can also be requested on a busy trunk.
Auto Call Back on No Reply (ACB-No Reply)
If the dialed station is not answering the call, caller station can set ACB on No Reply while Ring Back Tone is
played. When the dialed station user returns to desk and picks up the handset (or, goes OFF-Hook and ON-Hook),
the system detects its availability and places a call to the caller station. Both stations come in speech when the
station that requested ACB answers the call.
• Each station of VISIONPRO can set only one Auto Call Back request at a time. If you set another Auto
Call Back request, before the first one has been served, the system will override the first request and
serve the second.
• ACB - Busy and ACB - No Reply can be used simultaneously.
• Auto Call Back works for internal calls and for accessing trunk ports only.
How to configure
Auto Call Back is a "Class of Service (CoS)"
if it is enabled in the station's Class of Service.
The only configuration involved in this feature is enabling/disabling Auto Call Back in the Class of Service and
changing the duration of the Auto Call Back Ring Timer, if required.
Matrix VISIONPRO System Manual
dependant feature. An station user can set/cancel Auto Call Back only
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