Called Party Queuing

Last Updated : Mar 01, 2021 |

From Communication Manager Release 5.2, using Automatic Callback you can queue called parties. This feature works on analog, DCP, IP (H.323) and IP (SIP) telephones. From Communication Manager Release 5.2 onwards, use Automatic Callback for:

  • Multiple active callbacks for an extension, subject to the limitation on the total number of callbacks within the system

  • Callbacks for softphones, provided the softphone has at least one bridged call appearance on a physical station

A called telephone can have multiple active automatic callbacks. The callbacks are processed in the order in which they were activated. For the SIP endpoint only one automatic callback call is queued. The latest ACB activation overrides the previous queued call.

If a calling station uses multiple call appearances, the number of automatic callbacks depends on the number of Automatic Callback buttons assigned to the station.

Automatic Callback works the same way as it does on a local server, on the following networks:

  • On a Distributed Communication Server (DCS) network, Automatic Callback (ACB) requests from or to a station located on a different Communication Manager are queued and processed.

  • If your public service network provider supports ISDN Call Completion Busy Subscriber (CCBS), the CCBS requests are queued and processed.

  • On a QSIG network, ACB requests from or to a station located on a different Communication Manager are queued.