User manual

Selecting an Interface Cable 139
The V.36/RS-449 Interface
The V.36/RS-449 interface pin-out diagram and signal definitions and names are
shown below.
Pin # Signal Name Direction CCITT #
Case PGND Protective Ground Common 101
4 TXD+ Transmit Data Output 103A
5 TRXC+ Transmit Clock (DCE) Input 114A
6 RXD+ Receive Data Input 104A
7 RTS+ Request to Send Output 105A
8 RTXC+ Receive Clock (DCE) Input 115A
9 CTS+ Clear to Send Input 106A
10 TEST Local Loopback Activation Output 141A
11 DSR+ Data Set Ready Input 107A
12 DTR+ Data Terminal Ready Output 108A
13 DCD+ Data Carrier Detect Input 109A
14 RLB Remote Loopback Output 140A
15 RI Ring Indicator Input 125A
17 CLK+ Transmit Clock (DTE) Output 113A
18 TI Test Indicator Input 142A
19 GND DTE Common Return Common 102A/B
22 TXD- Transmit Data Output 103B
23 TRXC- Transmit Clock (DCE) Input 114B
24 RXD- Receive Data Input 104B
25 RTS- Request to Send Output 105B
26 RTXC- Receive Clock (DCE) Input 115B
27 CTS- Clear to Send Input 106B
29 DSR- Data Set Ready Input 107B
30 DTR- Data Terminal Ready Output 108B
31 DCD- Data Carrier Detect Input 109B
35 CLK- Transmit Clock (DTE) Output 113B
PGND
RXD+
RTS+
1
RI
DCD+
GND
TXD+
TRXC+
RTXC+
CTS+
DSR+
DTR+
CLK+
RXD-
RTS-
DCD-
TXD-
TRXC-
RTXC-
CTS-
DSR-
DTR-
TEST
RLB
TI
CLK-
37
19
20