Back-to-Back Configuration

Back-to-Back Configuration

The iSPAN-Serial WAN adapter can be connected to another serial adapter in a back-to-back configuration.

If the other adapter is also an iSPAN-Serial, the preferred interface is V.11; the cable must have the wiring shown in the following illustration. Both adapters must provide clocks.

Following is an illustration of a back-to-back cable configuration.

Male DB25

 

Male DB25

connector

 

connector

 

2

 

3

 

 

14

 

16

 

 

3

 

2

 

 

16

 

14

 

 

24

 

17

 

 

11

 

9

 

 

17

 

24

 

Adapter

9

 

11

DCE

side

4

 

5

side

 

 

 

 

19

 

13

 

 

5

 

4

 

 

13

 

19

 

 

7

 

7

 

 

18

 

18

 

 

1

Drain wire

1

 

Braid

Figure 3-7. Back-to-Back Cable Wiring

32

Interphase Corporation