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TC8116
User's Manual
Rev. 5.6D
RS-485 (2 wire) Electrical Signal Interface Connection & Pin Assignments
The RJ-11 connectors are located at the rear panel of the TC8116.
Two wire (Half Duplex) RS-485 Asynchronous
For two wire RS-485, use pins 3 and 4.
Either pin 6 or pin 1 can be Signal Ground.
Figure 6. Two wire RS-485 Async Pin Assignments & Virtual Connection Diagrams
Intercom & Analog Interfaces
For Voice and audio channels, pin 5 is transmit TIP & pin 2 is transmit RING (the signal from the handset's
mouth piece). Pin 4 is receive TIP & pin 3 is receive RING (the signal that goes to the handset's ear piece).
Similarly, pin 5 on an intercom channel is MIC+ & pin 2 is MIC-, while pin 4 is SPKR- and pin 3 is SPKR+.
Figure 7. RJ-11 Analog and Intercom Pin Assignments & Virtual Connection Diagrams
TC8116 Rear Panel
with 2 wire RS-485 Async interface
/
TxData-/RxData-
(Pin assignment)
RJ-11 JACK
1
2
3
4
5
6
(Async 2 wire RS-485)
RJ-11 JACK
RJ-11 JACK
Not used
/
/
Not used
2
2
5
5
4
3
6
1
1
6
4
3
Not used
TxData-/RxData-
TxData-/RxData-
Not used
FIBER CABLE
(Pin assignment)
RJ-11 JACK
Signal &
Frame
Ground
Signal &
Frame
Ground
1
2
3
4
5
6
(Analog)
RJ-11 JACK
RJ-11 JACK
TTIP
TTIP
5
5
2
2
4
3
3
4
TRING
TRING
RTIP
RTIP
FIBER CABLE
RRING
RRING
(Pin assignment)
RJ-11 JACK
1
2
3
4
5
6
(Intercom)
RJ-11 JACK
RJ-11 JACK
MIC+
MIC+
5
5
2
2
4
3
3
4
MIC-
MIC-
SPKR-
SPKR-
FIBER CABLE
SPKR+
SPKR+
(Pin assignment)
RJ-11 JACK
1
2
3
4
5
6
