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User Manual
24
Fundamental structure of RC3000-SUB-DS:
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:
Channel 1
2
3
4
Pines
RJ45-1, 1T,2R
RJ45-1, 3T,4R
RJ45-1, 5T,6R
RJ45-1, 7T,8R
Channel 5
6
7
8
Pins
RJ45-2, 1T,2R
RJ45-2, 3T,4R
RJ45-2, 5T,6R
RJ45-2, 7T,8R
1 2 3 4 5 6 7 8
1 2 3 4 5 6 7 8
Figure 5-6
RJ45-1 RJ45-2
Multiplexing
bus module
Figure 5-5
Voice channel
interface
Voice channel control
module
Multiplexing
module
Control bus
module
Voice input &
output
Control of
channel output
Interface
prot
ecti
on
Signal input &
output
2W & 4W balance
module
Voice D/A
converter
Detect of ring and
on-hook/off-hook
Bus interface
Multiplexing bus
Control bus