User`s manual

Fiiun 13, X.21 DB-15 male conmcbr pin assignments
Pin Number X21 Signals
2
9
3
10
4
11
5
12
6
7
13
14
a
1 and rholl
WB)
In-
hdiihW(B)
S@d Elommtllmi~ In W
Bi~nd Eknmt TiinB Gut W
Bi~nal Ebnont Tiing In (B)
Biinal Eland liin~ Gut(B)
Sinal Ground
CGND
When prompted by the diagnosics, insert the female loopback connector
into the male DB-15 connector on the SYNC/57Oi cable.
Fiiure 14, X.21 DE1 5 female bopback cormscbx wiring diimm
xl
3
57
32
Appendix C: X.21 /E&530 (EIA-422) Daughterboard