CTI Products EXB-232 Asynchronous Serial System Extender - Manual (Page 23)

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EXB-TELCO Module LINE Connector
Connector type: standard RJ11 telephone style, 6 position 4 contact.
For 2 wire leased-line operation, connect pins 3 and 4 from each EXB module to each end of the
bidirectional leased-line circuit.
For 4 wire leased-line operation:
• connect pins 3 and 4 of EXB module 1 to the circuit carrying audio from EXB1 to EXB2,
terminate this circuit to pins 2 and 5 of EXB2.
• connect pins 2 and 5 of EXB module 1 to the circuit carrying audio from EXB2 to EXB1,
terminate this circuit to pins 3 and 4 of EXB2.
LINE
1 2 3 4 5 6
CA-80088-100
Figure 8 Line Connector
Pin Function Notes
1 No Connection
2 4 wire receive tip Used for 4 wire channels only
3 2 wire tip / 4 wire transmit tip
4 2 wire ring / 4 wire transmit ring
5 4 wire receive ring Used for 4 wire channels only
6 No Connection
EXB-TELCO Module AUDIO Connector
Connector type: standard RJ11 telephone type, 4 position 4 contact
AUDIO
1
2
3
4
CA-80089-100
Figure 9 Audio (Handset) Connector
Pin Function Notes
1 audio in inactive during training, simultaneous voice audio in after training
2 audio out line audio during training, simultaneous voice audio out after training
3 audio ground
4 audio ground