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5.6 Function of RC3000-SUB-DM4
RC3000-SUB-DM4 is a 4-wire audio relay card with E&M signal, used for signal and voice
transmission between offices. There totally 4 channels decided by hardware, unchangeable. Four
RJ45 interfaces make up of the 4 channels (each RJ45 interface has one channel). Definition of RJ45
interface is as follows:
Channel 1 2 3 4
Pins
RJ45-1
1TX-T, 2TX-R
3RX-T, 4RX-R
6E, 7M
RJ45-2
1TX-T, 2TX-R
3RX-T, 4RX-R
6E, 7M
RJ45-3
1TX-T, 2TX-R
3RX-T, 4RX-R
6E, 7M
RJ45-4
1TX-T, 2TX-R
3RX-T, 4RX-R
6E, 7M
Note: 1TX-T and 2TX-R are 2-wire voice Tx, 3RX-T and 4RX-T-R are 2-wire voice Rx, 6E is E
signaling Rx and 7M is M signaling Tx.
Interface types of RC3000-SUB-DM4 and RC3000-SUB-DM2 cards are both TYPE V.
Fundamental structure of RC3000-SUB-DM4:
1 2 3 4 5 6 7 8
1 2 3 4 5 6 7 8
RJ45-1 RJ45-2
1 2 3 4 5 6 7 8
1 2 3 4 5 6 7 8
Figure 5-11
RJ45-3 RJ45-4
Voice channel control module
Multiplexing module
Voice channel
interface
Bus interface
Multiplexing
bus
Control bus
Multiplexing bus
process module
Control bus process
module
Voice input &
output
Signal input &
output
Control of channel
output
Voice D/A converter
E & M signal process
module
Figure 5-12
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