BusinessPhone Communication Platform 5.1
Facilities

## Call Waiting Indication

## Definition

When a call is camped on to a busy extension, the latter receives a call waiting signal in the form of a muted tone signal or tone bursts as indication that a call is waiting.

## Use

The call waiting indication informs the busy extension that further calls are waiting to be answered.

## Operation

### ECONOMY-, STANDARD- and EXECUTIVE telephones

Any number of calls can be camped-on to these system telephones.

Waiting calls are signalled with a muted ring signal.

To answer more waiting calls requires Line 1 or Line 2 to be made free by parking the ongoing call or trans- ferring it to another party.

Immediately after either Line 1 or Line 2 becomes free the call that has been camped-on longest will seize this traffic function and be signalled as a call. The associated lamp flashes to confirm the new call.

#### BASIC telephones

When a call waiting indication is heard the extension can end the ongoing call.

- The call that has been camped on longest will now ring at the extension
- The camped on party hears ring control tone.

#### ANALOGUE telephones

When a call waiting indication is heard the extension can either end the ongoing call or ask his conversation partner to hold on for a moment.

##### The extension ends the ongoing call

1. The call that has been camped on longest will now ring at the extension.
2. The camped on party hears ring control tone.

##### The extension parks the ongoing call

1. The extension presses the R-button.
2. When dial tone is heard, the extension goes on hook.

- The conversation partner is now camped on at the head of the queue.
- The extension is now called by the previously camped on call and, on answer, speech connection is established.
- The procedure utilising camp-on to own number can be repeated an unlimited number of times.

## Capacity

The number of camp-ons to each individual extension is unlimited.

The camped on calls are placed in a queue and handled in order of arrival.

## Limitations

Camp-on takes place only to a busy extension.

If the extension is free on Line 2 any new call will always be presented on this line.

Camp-on to an analogue telephone results in the busy extension receiving two tone bursts in her/his receiver.

## Programming

0108 |  | Camp-on allowed ?

Each extension can be blocked to prevent camp-on of calls to the extension.

Default data: YES = Camp-on permitted

0124 |  | Call waiting tone for analogue extensions?c

For an analogue extension to be able to receive call waiting tone the following needs to be programmed.

Default data: N = Call waiting tone is not supplied.

The following command is only accessable via BMS:

2029 |  | Repetitive call-waiting tone

There are two ways for indicating call waiting towards analogue extension:

- Value “no” gives a short tone each time a new call is put in the queue
- Value “yes” gives a continous tone as long as there are calls waiting

## Equipment

None

Revision: D © Ericsson Enterprise 2003