BusinessPhone Communication Platform 4.0
Facilities

## ISDN SS Subaddressing (SUB)

## Definition

The supplementary service subaddressing allows the served user to expand his addressing capacity beyond the one given by the E164 number plan.

A subaddress, if presented by a calling user, is delivered unaffected to the called (served) user. Only the served user defines the significance of the subaddress.

Subaddressing in ASB 150 02 is only applicable for the ISDN terminals on the S-Interface and depends on their individual programming.

## Use

The subaddressing is used to activate a certain function on the called ISDN terminal or to transmit a certain information.

## Operation

See User’s Guide of the ISDN terminal.

## Capacity/Limitations

See User’s Guide of the ISDN terminal.

## Programming

See User’s Guide of the ISDN terminal.

## Equipment

BTU-B_ or MFU.

Revision: H © Ericsson Enterprise 2003