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Back-to-Back Configuration
32 Interphase Corporation
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.
Figure 3-7. Back-to-Back Cable Wiring
Adapter
side
DCE
side
Male DB25
connector
Male DB25
connector
Drain wire
Braid
3
16
2
14
17
9
24
11
5
13
4
19
7
18
1
2
14
3
16
24
11
17
9
4
19
5
13
7
18
1