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X.21 interface 82
Model 3088 Series User Manual E • Interface pinouts
X.21 interface
D-sub-15 female connector (DTE/DCE orientation).
RS-232 console interface pin assignments
RJ-45 non-shielded connector (EIA-561)
Pin # Signal
1 Frame Ground
2 T - Transmit Data-A (DTE Source)
3 C - Control-A (DTE Source)
4 R - Receive Data-A (DCE Source)
5 I - Indication-A (DCE Source)
6 S - Signal Element Timing-A (DCE Source)
7 BT - Byte Timing-A (DCE Source)
8 SGND - Signal Ground
9 T/ - Transmit Data-B (DTE Source)
10 C/ - Control-B (DTE Source)
11 R/ - Receive Data-B (DCE Source)
12 I/ Indication-B (DCE Source)
13 S/ Signal Element Timing-B (DCE Source)
14 BT/ - Byte Timing-B (DCE Source)
Pin # Signal
1 DSR (out)
2 CD (out)
3 DTR (in)
4 Signal Ground
5 RD (out)
6 TD (in)
7 CTS (out)
8 RTS (in)