User's Manual Part 2

DB-9 to DB-9 Null Modem Cable
InterReach Fusion Wideband Installation, Operation, and Reference Manual Page 201
D-620616-0-20 Rev H • TECP-77-044 Issue 7 • May 2013 © 2013 TE Connectivity Ltd.
DBͲ9TODBͲ9NULLMODEMCABLE
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Figure64.DB-9 Female to DB-9 Female Null Modem Cable Diagram
Table97. DBͲ9FemaletoDBͲ9FemaleNullModemCablePinout
From Signal To Signal
P1-4 DTR P2-6, P2-1 DSR, DCD
P1-6 DSR P1-1, P2-4 DCD, DTR
P1-3 TXD P2-2 RXD
P1-2 RXD P2-3 TXD
P1-5 GND P2-5 GND
P1-7 RTS P2-8 CTS
P1-8 CTS P2-7 RTS
P1-9 N/C N/C N/C
DB-9 Connector
Pin
DB-9 Connector
Pin
1
2
3
4
5
6
7
8
9
1
2
3
4
5
6
7
8
9
Note that for each DB-9 connector, pins 1 and 6 are tied
together and sent to pin 4 of the opposite connector,
providing the required handshake signals.