BusinessPhone Communication Platform 4.0
Installation Instruction ASB 150 02 > Boards For ASB 150 02

## BTU-A (ROF 157 5110/_) and BTU-A2 (ROF 157 5120/_)

On delivery from the factory both contacts are in the OFF position, and the line is a normal trunk.

When both contacts on a DIP-switch are set to position ON, the line is to be regarded as a music source input.

Different contact positions are not allowed.

Note

Only lines 4 - 7 can be used as a music source input. Not available on BTU-A subequipped ROF 157 5127/_.

Revision: A © Ericsson Enterprise 2003