BusinessPhone Communication Platform 7.0
Installation Instruction ASB 150 02 > Boards for ASB 150 02

## BTU-C (ROF 157 5111/_)

- BTU-C (ROF 157 5111/1)
  Features 8 incoming trunk lines with DDI

The first four individuals can also be used for the outgoing traffic (bothway trunks without DID) as well as for music source inputs.

- BTU-C2 (ROF 157 5111/2)
  4 analogue tie lines with DC-loop signalling

In case of mains power failure one of the bothway trunks can be through connected to an analogue telephone extension (Connection field 4a, phone to pins 26/28).

#### Connections to BTU-C

Revision: J © Ericsson Enterprise 2005