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
1Output RxD/B1 from
network-side when monitoring
9Output RxD/B2 from user-side
when monitoring
2Not connected 10 Output RxD/B2 from network-side
when monitoring
3Output RxD/B1 from user-side
when monitoring
11 Not connected
4Input TxD/B2 12 Input TxD/B1
5Not connected 13 Output TxC (64 kHz inverted to
RxC)
6Output RxC (64 kHz) 14 Not connected
7Output frame signal B1 (8kHz) 15 Digital Ground
8Output frame signal B2 (8kHz)