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Fundamental structure of RC3000-SUB-DS:
Voice channel
interface
5.3 Function of RC3000-SUB-DO
FXO is a audio 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
channels). Definition of RJ45 interface is as follows:
1 2 3 4 5 6 7 8
Channel
Pines
Channel
Pins
Voice channel control
module
2W & 4W balance
module
Voice D/A
converter
Detect of ring and
on-hook/off-hook
1 2 3 4 5 6 7 8
RJ45-1
RJ45-2
Figure 5-6
1
RJ45-1, 1T,2R
5
RJ45-2, 1T,2R
Voice input &
output
Signal input &
output
Control of
channel output
Figure 5-5
2
RJ45-1, 3T,4R
RJ45-1, 5T,6R
6
RJ45-2, 3T,4R
RJ45-2, 5T,6R
Multiplexing
module
Multiplexing bus
Multiplexing
bus module
Control bus
module
3
4
RJ45-1, 7T,8R
7
8
RJ45-2, 7T,8R
User Manual
Bus interface
Control bus
24
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