User's Manual

DB-9 to DB-9 Null Modem Cable
InterReach Fusion Wideband Installation, Operation, and Reference Manual Page 201
D-620616-0-20 Rev K • TECP-77-044 Issue 9 • March 2015 © 2015 TE Connectivity
DB-9 TO DB-9 NULL MODEM CABLE
Use a DB-9 female to DB-9 female null modem cable to connect the craft person’s PC/Laptop to
the RS-232 port on the front of the Fusion Hub for IP address configuration. Table 102 lists the
cable pinout and Figure 45 shows a diagram of its wiring.
Figure 45.
DB-9 Female to DB-9 Female Null Modem Cable Diagram
Table 102. DB-9 Female to DB-9 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.