Cables
Polycom, Inc. 106
Null Modem Adapter
This adapter is used when connecting RealPresence Group 700 system to a serial device that transmits on
pin 3 such as Crestron Pro2 processor. It is a male to female DB-9 adapter plug.
Note: Do not use this adapter with an AMX device. AMX systems support both
RS-232 and RS-422. Therefore, for RS-232 support, use a null modem cross-over
cable that carries only pins 2, 3, and 5, with pins 2 and 3 crossed.
Length Part Number RoHS Compliant
— 1517-61577-001 Yes
Note: Drawings and part numbers are provided for reference only. Polycom claims no responsibility or
liability for the quality, performance, or reliability of cables based on these reference drawings, other
than cables provided by Polycom. Contact your Polycom distributor or Polycom Custom/Vertical
Products to order cables that meet the appropriate manufacturing tolerances, quality, and performance
parameters for your application.
DB9F DB9M
PIN 1&6 PIN 4
PIN 2 PIN 3
PIN 3 PIN 2
PIN 4 PIN 1&6
PIN 5 PIN 5
PIN 7 PIN 8
PIN 8 PIN 7
PIN 9 N/C
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