Specifications

Cables
2 - 41
Null Modem Adapter
This adapter is used when connecting a Polycom HDX 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. This connection may require the RS-232 cable, part
number 2457-09172-001, on page 2-39.
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
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