connection cable SUB-D; bulk
9 pin SUB-D jack > 9 pin SUB-D jack

- serial nullmodem connected
- e.g. to connect to PCs, , Firmwareupdate Digitalreceiver
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Pinout:
DB9F - DB9F
6+1 - 4
2 - 3
3 - 2
4 - 6+1
5 - 5
7 - 8
8 - 7
SHELL - SHELL