5
X
RS-232,485 + 2
X
E
THERNET
/2 M
BIT
/
S
G.703 (G.704) M
ULTIPLEXER
O
PERATING
M
ANUAL
IOA81-1E
1
August 2004
1 General
characteristics
1.1 Purpose
The device allows transmitting both asynchronous digital signals and Ethernet signals
through 64 kbit/s transmission channels of 2048 kbit/s stream structured in compliance with
ITU-T G.704 Recommendation.
The multiplexer is equipped with two 2048 kbit/s line ports that are compliant with ITU-
T G.703 recommendation in the physical layer. These ports enable connection with other tele-
communication devices like SDH or PCM-30 terminal equipment or any other signal sources
featuring the bitrate of 2048 kbit/s and equipped with corresponding interfaces.
The multiplexer enables adding the component 64 kbit/s signals to and dropping them
from a line stream of 2048 kbit/s, both in point-to-point or bus configuration.
1.2 Basic Features of the Unit
The unit is equipped with two line ports 2048 kbit/s compliant with ITU-T G.703 and
G.704 Recommendations.
Moreover, the multiplexer has five tributary ports compliant with ITU-T V.28 and V.11
standard, as well as two ports compliant with IEEE802.3 10BASE-T standard.
The device is available in two versions: powered from the 24
÷
50 V DC battery pack and
with power supply from 110
÷
230 V mains.
The multiplexer housing is 434 mm wide, 188 mm deep and 44 mm high. The front panel
of the device is equipped with the set of switches for device configuration and eleven LED
diodes that signal the device status.
It is possible to screw mounting brackets to the housing. These brackets are necessary for
mounting the device in a 19’’ or 21’’ telecommunication rack.
