Integrators’ Reference Manual for ViewStation EX, ViewStation FX, and VS4000

Serial Interface Control Signals

If you need to customize your V.35/RS-449/RS-530 interface, use the signal information in Table 2-21below in addition to the information provided by your network equipment vendor.

Table 2-21. Serial Interface Control Signals

Signal

 

 

 

(Pin)

In/Out

Description

Configuration Option

 

 

 

 

ST

OUT

Send Timing

Normal: falling edge sends data

(TC/TT)

 

(clock)

Inverted: rising edge sends data

 

 

 

 

RT (RC)

IN

Receive

Normal: rising edge receives

 

 

Timing (clock)

data

 

 

 

Inverted: falling edge receives

 

 

 

data

 

 

 

 

RTS

OUT

Request To

Normal: high is logic 1

(RTS)

 

Send

Inverted: low is logic 1

 

 

 

 

DCD

IN

Data Carrier

Normal: high is logic 1

(DCD)

 

Detect

Inverted: low is logic 1

 

 

 

Filter: allow DCD to drop for 60

 

 

 

seconds before changing call

 

 

 

state

 

 

 

 

CTS

IN

Clear To Send

Normal: high is logic 1

(CTS)

 

 

Inverted: low is logic 1

 

 

 

 

DTR

OUT

Data Terminal

Normal: high is logic 1

(DTR)

 

Ready

Inverted: low is logic 1

 

 

 

On: signal remains higha

DSR

IN

Data Set

Normal: high is logic 1

(DSR)

 

Ready

Inverted: low is logic 1

 

 

 

Answer: Use DSR as a Ring-In

 

 

 

indicationb

a. If set to ON, inverted is not an option.

b. DSR is not used as a ring-in indication if it is set to ANSWER in the V.35 Advanced Setup screen.

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Polycom EX4000, FX4000, VS4000 manual Serial Interface Control Signals, Signal Pin In/Out Description Configuration Option

EX, FX, VS4000, EX4000, FX4000, VS4000 specifications

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