Patton electronic 4900 ユーザーズマニュアル

Sync Serial port

SmartNode 4900 User Manual 

Two types of serial ports are available: V.35 or X.21. They are configured as DTE.  The V.35 is presented on a 
DB-25 female connector (see 

 for pin-outs). The X.21 is presented on a DB-15 female connector (see 

 for pin-outs).

Pins not listed are not used

Table 14. V.35 serial port signals (DB-25 connector)

1

 Frame Ground

2

 TD-a (to DCE)

3

 RD-a (from DCE)

4

 RTS (to DCE)

5

 CTS (from DCE)

6

 DSR (from DCE)

7

 Signal Ground

8

 CD (from DCE)

9

RC-b (from DCE)

11

XTC-b (to DCE)

12

TC-b (from DCE)

14

TD-b (to DCE)

15

TC-a (from DCE)

16

RD-b (from DCE_

17

RC-a (from DCE)

20

 DTR (to DCE)

24

XTC-a (to DCE)

Table 15. X.21 serial port signals (DB-15 connector)

1

Signal Ground

8

DTE Common Return

2

Transmit (to DCE)

3

Control (to DCE)

4

Receive (from DCE)

5

Indication (from DCE)

6

Signal Element Timing (from DCE)

9

Transmit (to DCE)

10.

Control (to DCE)

11

Receive (from DCE)

12

Indication (from DCE)

13

Signal Element Timing (from DCE)