Polycom C12 User Manual

Hardware Installation Guide for the Polycom SoundStructure C16, C12, C8, And SR12

2 - 14

At rates at or above 38,400 bps, it is recommended that flow control be enabled 

on the control system.  The SoundStructure device will detect the use of flow 

control automatically - no user adjustment is required to turn flow control on 

or off on the SoundStructure devices.
The maximum length of an RS-232 cable is determined by the overall 

capacitance of the cable.  For practical purposes, the length of the RS-232 cable 

should not exceed fifty feet.

SoundStructure devices provide balanced audio input and output connections 

that are terminated with 3.5 mm terminal blocks. For each balanced analog 

input or output on the SoundStructure rear-panel, the first pin should be 

connected to the positive signal, the second pin is connected to the negative 

signal, and the third pin is chassis ground as shown in the balanced audio 

1

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1

-

2

TX

2

RX

3

RX

3

TX

4

-

4

-

5

Ground

5

Ground

6

-

6

-

7

CTS

7

RTS

8

RTS

8

CTS

9

-

9

-