Ericsson RBS 2106 Reference Manual page 126

Product Data RBS 2206
OVP for External Alarm
It is possible to connect 16 external alarms to the DF. Each alarm
connection is provided with over-voltage protection. (One OVP module
protects two alarm connections.)
OVP Module for PCM Lines
The distribution Frame (DF) provides overvoltage protection for PCM-
lines. In addition, a PCM-line can be provided with a blaun (balanced/
unbalanced transformer) to convert an unbalanced 75
balanced 120
By-pass Board,
Balun Board,
or Dummy Board
Figure 56
Each module provides overvoltage protection for two PCM lines.
The overvoltage protectors (OVP) are mounted on an OVP board
inserted into a slot connector in the OVP module. An OVP board
contains gas discharge tubes and serial fuses for protection of two lines.
The other slot connector in the OVP module can be equipped with
several options:
•
124 (485)
line.
OVP module for PCM lines
A dummy board, when the transmission system is twisted pairs.
© Ericsson Radio Systems AB
— All Rights Reserved —
line to a
OVP Board
P008443A
EN/LZT 720 0008
2001-11-28
P2A