4xx Preliminary Generic User Guide. 4 Jan 06
12
Full Duplex Operation (4 Wire ‘2pairs’)
4-WIRE FULL DUPLEX systems use 2 pairs of wire to interconnect the Master
and Slave Controllers. One pair carries data from the Master to the Local
Controllers and the second pair carries data back from the Local Controllers to the
Master. The far end modem does not have to wait till the master has completed its
message before it starts to respond, therefore faster turn around times can be
achieved.
Audio Out from the Master connects to the Local Controllers’ AUDIO IN.
Audio In at the Master connects to all of the Local Controllers’ AUDIO IN.
The DIP Switch diagram below is where the adjustments are made to operate in
the 4 wire mode, note also you can change various timing parameters.
The settings shown are for 4 Wire which is Full Duplex operation.
OUT
IN
OUT
IN
OUT
IN
TMC
Host
RS232
419
Modem
419
Modem
419
Modem
Half Duplex
RTS to
Data Delay
Full Duplex
PIN-9
(Half Duplex)
Normal
RTS to CTS Time 12ms
6ms
Cxr. Turnoff Time 10ms
5ms
Local Echo (Full Duplex)
Off
On
Rcr. Squelch Time
6ms
3ms
Cxr. Detect
8ms
4ms
Load Compensation
Hi
600
KOD FUNCTION
Off
On
Ext
Int
Off
1.6ms
Off
3.3ms
Off
6.6ms
Off
13ms
Anti- Streaming
Off
On
EXTERNAL KOD
Switch Actuator
GDI Communications
Verdi Nevada
Tel. 775 345-8000
Fax. 775 345-8010
Normal
6
9
1
5
TXD
RXD
GND
DCD
CTS
RTS
RS232 Male Pin-out
RS422 Male Pin-out
1 TXD +
2 TXD -
3 RXD +
4 RXD -
5 GND
6 RTS -
7 RTS +
8 CTS +
9 CTS -
1 KOD
2 DCD
3 N/C
4 GND
5 RXD
6 TXD
7 CTS
8 RTS
RJ 45 Pin-out
1
8
KOD Installed
YES
NO
KOD DIRECTION
Off
On
(+12)
(KOD RTS)
