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M120 X.21 and V.35 Cable Pinouts for EIA-530 PIC

 

The EIA-530 PIC accepts X.21 and V.35 cable connectors.

  • A V.35 connection requires an DB-25 to V.35 cable and connects to a V.35 data terminal equipment (DTE) 34-pin Winchester type male cable (one per port). Table 1 describes the V.35 cable pinouts.

  • An X.21 connection requires an DB-25 to X.21 cable and connects to a X.21 DTE DB-15 male cable. Table 2 describes the X.21 cable pinouts.

Figure 1: M120 EIA-530 PIC
M120 EIA-530 PIC

Table 1: M120 DB-25 Connector to V.35 Connector Pinout

DB-25 Pin

Signal

V.35 Pin

Description

2

TD

P

Transmit Data

14

TD

S

Transmit Data

3

RD

R

Receive Data

16

RD

T

Receive Data

4

RTS

C

Ready To Send

5

CTS

D

Clear To Send

6

DSR

E

Data Set Ready

20

DTR

H

Data Terminal Ready

24

XTC

U

DTE Transmit Clock

11

XTC

W

DTE Transmit Clock

15

TC

Y

Transmit Clock

12

TC

AA

Transmit Clock

17

RC

V

Receive Clock

9

RC

X

Receive Clock

1

FGND

A

Protective Ground

7

GND

B

Signal Ground

8

DCD

F

Data Carrier Detect

Table 2: DB-25 Connector to DB-15 (X.21) Connector Pinout

DB-25 Pin

Signal

DB-15 (X.21) Pin

Description

1

FGND

1

Protective Ground

7

GND

8

Signal Ground

2

T

2

Transmit Data

14

T

9

Transmit Data

3

R

4

Receive Data

16

R

11

Receive Data

4

C

3

Request To Send

19

C

10

Request To Send

8

I

5

Data Carrier Detect

10

I

12

Data Carrier Detect

17

S

6

Receive Clock

9

S

13

Receive Clock