Specifications

Cables
Polycom, Inc. 2–55
The DB-9 male connector on the Polycom HDX system has the following
connections.
Most devices which connect to the serial port to control the Polycom HDX
system via the API only require pins 2, 3, and 5. For more information and to
verify the proper cabling, refer to the documentation for your control system.
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.
Pin Signal
1 Not used
2Rx
3Tx
4 DTR (tied to pin 6, DSR)
5GND
6 DSR (tied to pin 4, DTR)
7RTS
8CTS
9 Not used