BusinessPhone Communication Platform 4.0
Facilities

## Ring And Tone Signals

## Definition

A ring signal is a signal to inform the recipient that a call is waiting.

On system telephones the ring signal is issued from a program-controlled tone ringer in the telephone.

On analogue telephones the ring signal is issued from a built-in bell that is driven by ring voltage from the extension board (ELU-A/MFU).

Tone signals are used to supply connection messages to the extension user.

Both ring signals and tone signals are determined by the specifications of the relevant market.

## Use

A ring signal can be used in all situations when an incoming call is presented on a traffic function key.

## Operation

None

## Capacity

Each traffic function key can be programmed for five different types of ring signal.

Ring and tone cadences for different markets are stored in EPROM.

## Limitations

Only one call at a time can be ringing at each individual telephone.

If a system telephone is busy, that is a traffic function key shows busy indication, new calls on other traffic functions will automatically be announced by a single muted ring burst.

## Programming

### Ring signal diagrams

The ring diagrams are stored in an EPROM and can be selected via command.

2001 |  | Ring signal scheme

### Type of ring signal

The type of ring signal can be programmed for each individual traffic function key. The ring signal type can be programmed either via system programming or individual programming.

For individual programming, see document Facility Description (155 34-ASB 150 02 Uen).

0303 |  | Ringing alternative

0114 |  | Ringing line 1

0115 |  | Ringing line 2

## Equipment

None

Revision: D © Ericsson Enterprise 2003