BusinessPhone Communication Platform 7.0
Facilities

## Automatic Callback – Busy/Free Extension

## Definition

An extension that does not receive an answer or encounters busy during a call to another extension, can order callback.

#### Definition of “busy”

- Both Line 1 and Line 2 are busy.
- Line 2 is blocked for calls and the extension is busy with another call via Line 1, trunk of dedicated intercom line.

#### Definition of “no answer”

- Both Line 1 and Line 2 are free, but the called party does not answer.
- Line 1 is blocked because of an ongoing call. The extension is free on Line 2 for other calls, but the called party does not answer.

On receipt of an order the system initiates monitoring of both caller and called party.

When both of the monitored parties are free at the same time, the party who ordered callback will be rung.

When the ringing has been answered, a new call will be initiated automatically to the extension that was called originally.

## Use

Automatic callback is a valuable function, when one wishes to be sure of gaining contact with the caller immediately after the latter goes free or after he/she has used his/her phone again.

During the monitoring period the extension that ordered callback can use the telephone freely.

## Operation

### All telephones

#### To order callback

An extension that, when initiating a call, encounters busy or no answer , can order callback by pressing digit key 5 or another selected digit.

When the system has accepted the order, the extension will receive verification tone or silence.

If the order is rejected, the extension will continue to receive busy tone.

Extensions equipped with DBC 223, DBC 213 and DBC 662 telephones may press the menu key call‑back.

Note

Callback may not be possible because of categorisation or the current traffic situation, even if the menu key call‑back is shown.

#### Callback

When both parties go free, the ordering extension is notified by a special ring signal.

The call is presented on Line 1 or Line 2 as a normal internal call.

When the ordering extension answers, the monitored extension is called as for a normal internal call.

The called extension receives an internal ring signal and the caller ring control tone.

While the ordering extension is being rung the monitored extension is blocked for own and other calls.

A CN call back will be handled as it is programmed via the command 0177 (see also chapter Programming)

For more information regarding Corporate Networking,
see "Networking” (365/155 34-ASB 150 02 Uen).

## Capacity

A maximum of 25 monitoring orders can be stored in the system.

## Limitations

- Attempt to order callback to own directory number is rejected. Calling party continues to receive busy tone.
- An extension can set up several monitorings of different extensions.
- Orders from different extensions to a common extension are processed in the order they arrive.
- If, when order is issued, ongoing monitoring already between the parties exists , a new monitoring period will be set.
- If parties activate "follow me" or "diversion" during monitoring period, monitoring will not be affected.
- Automatic callback is activated when both ordering party and called extension are free at the same time.
- Unless monitored parties have become free within two hours, monitoring will be terminated.
- It is not possible to set a call back to DBC 224, DBC 214 and DBC 663 telephone sets.

## Programming

0106 |  | Call back allowed?

0177 |  | Initiate callback in corporate network?

Following commands are only accessable via BMS:

2008 |  | Verification tone on call back

2402 |  | Digit for Call back

## Equipment

None.

Revision: F © Ericsson Enterprise 2005