Raisecom Technology Co., Ltd
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7.3. RC3000-SUB-DO voice relay card explanation
FXO is a voice relay card for the relay of FBX voice channel and is connected to output
interface of FBX voice channel. There are 8 channels of a FXO and the channel number
is decided by hardware, unchangeable. Two RJ45 interfaces make up of the 8 channels
(each RJ45 interface has four channnels). Definition of RJ45 interface is as follows:
Channel 1 2 3 4
Pines RJ45-1 1A,2B RJ45-1 3A,4B RJ45-1 5A,6B RJ45-1 7A,8B
Channel 5 6 7 8
Pins RJ45-2 1A,2B RJ45-2 3A,4B RJ45-2 5A,6B RJ45-2 7A,8B
Fundamental structure of RC3000-SUB-DO:
1 2 3 4 5 6 7 8
1 2 3 4 5 6 7 8
Figure 24
RJ45-1 RJ45-2
Voice channel control
module
Multiplexing
module
Voice
channel
interface
Bus
interface
Multiplex
ing bus
Control
bus
Multiplexing
bus module
Control bus
module
Voice input &
out put
Signal input
& out put
Control of
channel
output
2W & 4W balance
module
Voice D/A
converter
Detect of loop and
ring
Int
erf
ac
e
pr
ot
ec
tio
n
Figure 25