Perle Systems 1700 V.35 Null-Modem Cable Configuration

V.35 Null-Modem Cable Configuration
ProtectiveGND
TransmittedData (A)
TransmittedData (B)
ReceivedData (A)
ReceivedData (B)
TransmitterSignal Element Timing (A)
TransmitterSignal Element Timing (B)
ReceiverSignal Element Timing (A)
ReceiverSignal Element Timing (B)
TransmitterSignal Element Timing (A)
TransmitterSignal Element Timing (B)
DataTerminal Ready
SignalG round
DataChannel Received Line Signal Detector (CD)
Requestto Send
DataSet Ready
TransmitterSignal Element Timing (A)
DB25M
A
LE
1
9
10
11
12
18
19
14
16
23
25
20
7
8
4
6
DB25M
A
LE
1
11
12
9
10
14
16
23
25
18
19
8
7
20
6
4
TransmittedData (A)
ReceivedData (A)
TransmittedData (B)
ReceivedData (B)
ReceiverSignal Element Timing (A)
ReceiverSignal Element Timing (B)
TransmitterSignal Element Timing (B)
TransmitterSignal Element Timing (A)
TransmitterSignal Element Timing (B)
DataChannel Received Line Signal Detector (CD)
DataTerminal Ready
SignalGround
DataSet Ready
Requestto Send
ProtectiveGND
Figure D – 10 V-35 Null-Modem Cable
The connecting cable must be a shielded cable.
Circuits which are paired (contain an (A) and (B) reference) should be connected to
twisted pairs within the connecting cable.
This cable is needed when it is necessary to connect two units back-to-back and a
set of modems is not available. Note that this cable specifies DB25 connectors on
each end to allow direct connection to the link interface connector on each unit.
The link speed must be defined for each of the two units.