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Appendix A: Interfaces
A-36
K1297-G20 Monitor User Manual
B Channel Access Adapter. B channel data is extracted using an optional
accessories adapter cable, which features two connectors: a 10-pin mini
plug for the interface module (“64k EXT”) on one end and a female 15-pin
D-Sub plug on the other end with the following pin assignment.
8
1
9
Figure A–3: B channel connection
Table A–23: Pin assignment for B channel connection
Pin Assignment Pin Assignment
1 Output RxD/B1 from
network-side when monitoring
9 Output RxD/B2 from user-side
when monitoring
2 Not connected 10 Output RxD/B2 from network-side
when monitoring
3 Output RxD/B1 from user-side
when monitoring
11 Not connected
4 Input TxD/B2 12 Input TxD/B1
5 Not connected 13 Output TxC (64 kHz inverted to
RxC)
6 Output RxC (64 kHz) 14 Not connected
7 Output frame signal B1 (8kHz) 15 Digital Ground
8 Output frame signal B2 (8kHz)