Specifications

The V.35 Interface 17
Table 5. V.35 Interface Signals
Pin # Signal Name Direction CCITT #
1 PGND Protective Ground Common 101
4 RTS Request to Send Output 105
5 CTS Clear to Send Input 106
6 DSR Data Set Ready Input 107
7 SGND Signal Ground Common 102
8 DCD Data Carrier Detect Input 109
9 RCLK+ Receive Clock from Modem Input 115A
10 RCLK- Receive Clock from Modem Input 115B
11 RXD+ Receive Data Input 104A
12 RXD- Receive Data Input 104B
13 CLK- Transmit Clock to Modem Output 113B
14 TCLK+ Transmit Clock from Modem Input 114A
16 CLK+ Transmit Clock to Modem Output 113A
18 TEST Local Loopback Activation Output 141
19 TXD+ Transmit Data Output 103A
20 DTR Data Terminal Ready Output 108
21 RLB Remote Loopback Output 140
22 RI Ring Indicator Input 125
23 TCLK- Transmit Clock from Modem Output 114B
25 TI Test Indicator Input 142
26 TXD- Transmit Data Output 103B
The V.35 Interface
A pin-out diagram for the V.35
interface is shown in Figure 6.
The signal definitions and names
are listed in Table 5.
Figure 6. V.35 Interface
PGND
RXD+
RTS
RI
DCD
SGND
TXD+
CTS
DSR
DTR
CLK+
TEST
RLB
TI
RCLK+
TXD-
RXD-
CLK-
RCLK-
TCLK+
TCLK-
1
10
19