User Manual

Ericsson Internal
DESCRIPTION 22 ( 24 )
/ XSNJOER 174/1551-LZA 701 0001 Uen
EAB/ FJG/YP ( Louise Cederlund) 2007-06-12 A
Prepared (also subject responsible if other) No.
Approved Checked Date Rev Reference
8.5 Power Consumption
The power consumption figures in the table below show peak load. The figures
in the table have been rounded off.
Table 15 Power Consumption
Power Supply Voltage
RBS 2207
Cabinet (fully
equipped)
120–250 V AC +24 V DC
48 V DC
Maximum
Power
Consumption
1.7/2.9
(1)
kW 1.4 kW 1.7 kW
(1) Power consumption during maximum battery charging.
9 Transmission
The RBS 2207 is normally connected to a Distribution Frame (DF) that serves
as an interface for the transmission (PCM) lines. Two PCM cables are
connected to the ports on the connection field of the RBS. The RBS 2207
supports two transmission standards:
• T1 1.5 Mbit/s, 100
balanced PCM line
• E1 2 Mbit/s, 75
unbalanced (Transmission Adapter used), or 120
balanced line
Link access procedures on C-channel (LAPD) concentration and LAPD
multiplexing can be used to make the transmission resource more efficient.
PCM Overvoltage Module
This module is mounted in the DF and contains overvoltage protection for
the PCM lines. If the PCM lines are terminated in equipment outside the
RBS equipment room, these lines must then be protected by overvoltage
protectors (OVP) in the DF. Failure to do so might damage the DXU-21, if a
voltage transient is transported along the cable. The RBS 2207 is designed for
100/120
balanced (twisted pair) cable. When a 75 unbalanced (coaxial)
cable is to be connected, the module contains a balun card that converts 75
unbalanced to 100/120 balanced line.
Optional Transmission Equipment
The cabinet can be connected to optional transmission equipment that is
mounted externally. The optional transmission equipment used is:
• Transmission adapter to connect 75
unbalanced line directly to the RBS
• MINI-LINK