East Coast Datacom Nx8- Dual Composite MUX High-Speed 16-Port TDM Multiplexer Dokumentacja Pobierz pdf (Strona 71)

166119 8/31/2006

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5.3.5 Channel Port X.21 Adapter Cable Connection Diagram

Use the following diagram when constructing or specifying an adapter cable between any

Nx8-DualMUX Channel port operating in EIA-530 mode and a standard X.21 cable, or DTE

device.

EIA-530 mode

25-pin Male

Sub-miniature D

X.21

15-pin Female

Sub-miniature D

Signal

Pin

Pin

Signal

TXD+

2

\

<><><><><><><><><> Twisted Pair <><><><><><><><>

/

2

Transmit+

TXD-

14

/

\

9

Transmit-

RXD+

3

\

<><><><><><><><><> Twisted Pair <><><><><><><><>

/

4

Receive+

RXD-

16

/

\

11

Receive-

RXC+

17

\

<><><><><><><><><> Twisted Pair <><><><><><><><>

/

6

Timing+

RXC-

9

/

\

13

Timing-

RTS+

4

\

<><><><><><><><><> Twisted Pair <><><><><><><><>

/

3

Control+

RTS-

19

/

\

10

Control-

CTS+

5

\

<><><><><><><><><> Twisted Pair <><><><><><><><>

/

5

Indication+

CTS-

13

/

\

12

Indication-

Ground

7

-

=============================================

-

8

Ground

Shield

1

-

=============================================

-

1

Shield

Table 22 – Channel Port to X.21 Adapter

1 2 ... 66 67 68 69 70 71 72 73 74 75 76 77

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