Serial Interface Control Signals; Table 2-21. Serial Interface Control Signals - Polycom SoundStation2 EX, FX, VS4000 Integrator's Reference Manual

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

Serial Interface Control Signals

38
If you need to customize your V.35/RS-449/RS-530 interface, use
the signal information in Table 2-21 below in addition to the
information provided by your network equipment vendor.

Table 2-21. Serial Interface Control Signals

Signal
(Pin) In/Out
ST OUT
(TC/TT)
RT (RC) IN
RTS OUT
(RTS)
DCD IN
(DCD)
CTS IN
(CTS)
DTR OUT
(DTR)
DSR IN
(DSR)
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.
Description Configuration Option
Send Timing Normal: falling edge sends data
(clock) Inverted: rising edge sends data
Receive Normal: rising edge receives
Timing (clock) data
Inverted: falling edge receives
data
Request To Normal: high is logic 1
Send Inverted: low is logic 1
Data Carrier Normal: high is logic 1
Detect Inverted: low is logic 1
Filter: allow DCD to drop for 60
seconds before changing call
state
Clear To Send Normal: high is logic 1
Inverted: low is logic 1
Data Terminal Normal: high is logic 1
Ready Inverted: low is logic 1
On: signal remains high
Data Set Normal: high is logic 1
Ready Inverted: low is logic 1
Answer: Use DSR as a Ring-In
indication
a
b
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