39(46)
Date
Rev
Documentnumber
Prepared
Doc respons/Approved
Checked
Reference
1998-05-29
L
1531-BDV BS 101 01 Uen
INSTALLATION INSTRUCTION
Subject responsible
8
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.
No stubs and/or branches may exist on a digital extension lines, as they could cause transmission problems.
•
The network lines are to be connected directly to the internal Krone MDF with prefabricated cables (TSR BS
902 0001/800) leading to the boards.
•
In case a separate Ericsson MDF has to be 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.
For connection of ELU-A, ELU-D, BTU-A, BTU-C or BTU-E to the internal MDF use the following cable:
•
TSR BS 902 0001/800 is terminated on the board side with standard Ericsson connectors and Krone
connectors on the other side.
For connection of ELU-A, ELU-D, BTU-A, BTU-C or BTU-E to a external MDF use following cables:
•
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 the following cable:
•
TSR 225 1304/20000, 75
Ω
coaxial cable
•
or use the same cable as for BTU-A for 120
Ω
connection or a double shielded cable TSR 901 0481/20000
(adhere to local requirements).
The cables run into the exchange from below the cabinet.
The cables from the line network are led directly to the MDF in the exchange cabinet.
Secure the cables to the exchange cabinet with the adhesive anchors and bundling cord.