Westermo TD-36 - Manual (Page 27)

27 6618-2202
S3 DIP-switch
V.23 leased line termination*
ON
1 2 3 4 5 6 7 8
Termination disabled
ON
1 2 3 4 5 6 7 8
Termination of transmitter /
receiver in 2-wire mode and
Transmitter in 4-wire mode
ON
1 2 3 4 5 6 7 8
Termination of receiver
in 4-wire mode
ON
1 2 3 4 5 6 7 8
Termination of both transmitter /
receiver in 4-wire mode
* The leased line should be terminated at the end points.
Termination recommandations of Leased lines
and Dial-up connections
In some connections the communication line (Leased Line or PSTN) must be
terminated. The table below shows the right way to activate the termination
for different usages. As a standard, the receiver in multidrop systems at the end
points shall be terminated.
S3 DIP-switch
Termination recomendations for TD-36 485
ON
1 2 3 4 5 6 7 8
PSTN
ON
1 2 3 4 5 6 7 8
Multidrop
V23 2-wire – endunit
ON
1 2 3 4 5 6 7 8
PSTN
Backup
ON
1 2 3 4 5 6 7 8
Multidrop
V23 2-wire – dropunit
ON
1 2 3 4 5 6 7 8
2-wire
Leased Line
ON
1 2 3 4 5 6 7 8
Multidrop
V23 4-wire – endunit
ON
1 2 3 4 5 6 7 8
4-wire
Leased Line
ON
1 2 3 4 5 6 7 8
Multidrop
V23 4-wire – dropunit