The V.24 Interface - Siemens Gigaset M 101 Data Operating Instructions Manual

The V.24 interface

Name Based on CCITT
DCD 109 = Data Carrier Detect
CTS 106 = Clear To Send
DSR 107 = Data Send Ready
DTR 108 = Data Terminal Ready
GND 102 = Signal Ground
RTS 105 = Request To Send
RxD 104 = Receive Data
TxD 103 = Transmit Data
RI 125 = Ring Indicator
Transmitter
TxD
RxD
RTS
CTS
GND
25-pin plug based on CCITT
25
24
23
22
125 RI
21
108 DTR
20
19
18
17
16
15
14
22
Data carrier signal
Clear to send signal
Data send ready
Data terminal ready
Signal ground
Request to send
Receive data
Transmit data
Incoming call
PC with 9-pole
SubD socket
13
12
11
10
9
109 DCD
8
102 GND
7
107 DSR
6
106 CTS
5
105 RTS
4
104 RxD
3
103 TxD
2
1
Meaning
TxD (3)
RxD (2)
RTS (7)
CTS (8)
GND (5)
9-pole SubD socket
RI 9
CTS 8
RTS 7
DSR 6
Pin no.
Socket 1
1 DCD
2
3
4
5
6
7
8
9 RI
* male
** female
Std. Pin Assign.
25-pin
8
5
6
20
7
4
3
2
22
Receiving PC with
25-pole socket
TxD (2)
RxD (3)
RTS (4)
CTS (5)
GND (7)
5 GND
4 DTR
3 TxD
2 RxD
1 DCD
Signals to:
*
Socket 2
DCD
receive transmit
RxD TxD
TxD RxD
DTR DSR
GND GND
DSR DTR
RTS CTS
CTS RTS
RI
receive transmit
9-pin
1
8
6
4
5
7
2
3
9
**