BusinessPhone Communication Platform 4.0
Installation Instruction ASB 150 02

## Line Network

The line network for PBX-extensions is to be installed in accordance with the stipulations for standard telephone networks. Twisted pair cables must be used for the lines and a wire diameter 0.5 mm is recommended in order to reach full line length, i.e. 800 m.

Note

No stubs and/or branches may exist on a digital extension lines, as they could cause transmission problems. This does not apply for ISDN configurations.

- The network lines are to be connected directly to the boards with prefabricated cables which are equipped with EURO-connectors for 4 wire-pairs
- In those cases where a separate ERICSSON MDF has been installed, prefabricated cables are used between the MDF and board connectors in the exchange cabinet.
  These cables have EURO-connectors mounted at one end for connection to the board

To connect the ELU-A, ELU-D, MFU, BTU-A, BTU-C and BTU-E to MDF, use cable:

- TSR 902 0444/1 (length = 1.5 m) is terminated with standard ERICSSON connectors
- TSR 902 0472/3 (length = 6 m) is equipped with connector only at the exchange side
- TSR 901 0472/2 (length = 15 m) is equipped with connector only at the exchange side

For connection of BTU-D, use cable:

- TSR 225 1304/20000, 75 W coaxial cable
- use the cable TSR 902 0444/1 for 120 W connection or a double shielded cable TSR 901 0481/20000 (adhere to local requirements).

Place the cables according to the figure.

Secure the cables to the MDF cabinet with the adhesive anchors and cable fastener.

Note

There must be a connection to earth for the MDF cabinet when surge protectors are installed.

Revision: A © Ericsson Enterprise 2003