Specifications

Table Of Contents
Integrator’s Reference Manual for Polycom HDX Systems
2–54 Polycom, Inc.
Serial Cables
Straight-Through Serial Cable
This cable connects a Polycom HDX system to a serial device. It has a DB-9
connector on each end. The maximum approved length for this cable is 100 ft
(30 m).
Polycom does not recommend using this straight-through serial cable for RS-232
communication from a computer, Crestron system, or AMX device. Instead, for
RS-232 communication, Polycom recommends using a cross-over cable with pin 2
wired to pin 3, pin 3 wired to pin 2, and pin 5 wired to pin 5. The other pins are not
used.
If you choose to use this straight-through serial cable for RS-232 communication
from a computer or Crestron system, the null modem adapter 1517-61577-001 on
page Null Modem Adapter on page 2-56 is required. However, the null modem
adapter does not work for RS-232 communication from AMX devices and will cause
problems if you try to use it.
Length Part Number RoHS Compliant
25 ft (7.6 m) 2457-09172-001