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

## ELU-A and ELU-D_

The connection of extension boards described in this chapter are:

- ELU-A (ROF 1575 114/1)
- ELU-A2 (ROF 1575 114/2)
- ELU-D (ROF 1575 116/_)
- ELU-D3 (ROF 157 5130/_)

On sub-equipped ELU-A and ELU-D_ boards the connection for extensions 8...15 (32) are not mounted.

On the first ELU-D_ board in the system the first three extension positions should be used to connect the OPERATOR telephones.

Revision: A © Ericsson Enterprise 2003