BusinessPhone Communication Platform 5.1
Facilities

## ISDN SS Connected Line Identification Presentation (COLP)

## Definition

The supplementary service COLP provides the calling party with the possibility to receive identification of the connected party.

## Use

This feature is used for outgoing calls in order to identify the called party by means of the actual connected directory number. This number may be another number than the dialled one, e.g. if the desired B-party has activated call diversion.

The number of the actual connected party is presented on the display of the STANDARD, EXECUTIVE, OPERATOR telephone and to the ISDN terminal at the S-Interface.

## Operation

### Outgoing external call

For an outgoing ISDN call, the A-party receives an indication of the actually connected national significant number (= national destination code + national subscriber number) after answering of the called B-party. This received number overwrites the actually dialled one.

It depends on the terminal type used, how the connected number will be presented on the ISDN terminal (see User’s Guide).

##### Example

A-party dials 0181100 ext. 5446

The connected number is ext. 4736

Dialling:

Connected:

#### Connected party’s number is suppressed

If the answering B-party has activated the supplementary service COLR (Connected Line Presentation Restriction, see following chapter), the B‑number is restricted at the A-party and a special information is presented on the display of the STANDARD, EXECUTIVE and OPERATOR telephone.

It depends on the terminal type used, how the number suppression will be shown on the ISDN terminal. (see User’s Guide).

##### Example

A-party dials 0181100 ext. 5446

This subscriber number is diverted, and the new number has the supplementary service COLR activated.

### Incoming external call

The public network sends the identification of the connected party (national significant number of the connected party’s PBX) to the A-party.

ASB 150 02 supports the public network with additional information about the connected extension. The identification of the connected extension comprises either the national significant number, the public subscriber number or only the directory number of the connected extension, depending on the configuration.

## Capacity

If the number of the actual connected party has more than 16 digits, only the last 16 digits are presented on the display of a STANDARD and OPERATOR telephone.

## Limitations

The number of the connected B-party is only transmitted upon the first answer. If the call is transferred after the first answer, the new number is not transmitted to the A-party.

For an incoming ISDN call the following numbers are sent to the public network.

In the cases below only the directory number is mentioned. It depends on the configuration, what predigits of the directory number are used.

### B-party is an extension or an ISDN terminal

The directory number of the answering extension or the ISDN terminal is sent to the public network.

### B-party is an operator

The directory number of the answering operator is sent to the public network.

If the call is queued at the operator, the number of the answering B-party will not be sent to the public network.

### B-party is a PBX-hunting group

The directory number of the respective answering group member is sent to the public network.

### B-party is a voice service (e.g. programmed absent info)

The B-party number will not be sent to the public network.

### B-party is an ACD group

The directory number of the answering agent is sent to the public network.

If the call to the ACD group is queued in the ACD queue, the B-party number will not be sent to the public network.

## Programming

1918 |  | Provision of connected line identification

0169 |  | Directory number in subscribed PSTN series

1974 |  | Type of Screening Indicator

## Equipment

BTU-D with ISDN prom set or BTU-B_ or MFU.

Revision: K © Ericsson Enterprise 2003