Cisco 2500 Series Installation And Configuration Manual page 79

Cabling
J1-45 Circuit_GND
Shield -
J1-35 CTS/RTS
Shield -
J1-42 RTS/CTS
Shield -
J1-43 DTR/DSR
Shield -
J1-44 LL/DCD
Shield -
J1-34 DSR/DTR
Shield -
J1-33 DCD/LL
Shield -
J1-28 RxD/TxD+
J1-27 RxD/TxD-
J1-18 TxD/RxD+
J1-17 TxD/RxD-
J1-26 RxC/TxCE+
J1-25 RxC/TxCE-
J1-22 NIL/RxC+
J1-21 NIL/RxC-
J1-20 TxCE/TxC+
J1-19 TxCE/TxC-
X.21
Figure C-10 shows the X.21 cable assembly.
pinouts. Arrows indicate signal direction: --> indicates DTE to DCE, and <-- indicates DCE to DTE.
Figure C-10: X.21 Cable Assembly
http://www.cisco.com/univercd/cc/td/doc/product/access/acs_fix/cis2500/2520/2520_23/c2520cab.htm (15 of 17) [10/27/2000 3:08:10 PM]
Twisted pair no. 12 -
-
Twisted pair no. 8 <--
-
Twisted pair no. 9 -->
-
Twisted pair no. 10 -->
-
Twisted pair no. 11 -->
-
Twisted pair no. 7 <--
-
Twisted pair no. 6 <--
-
Twisted pair no. 5 <--
<--
Twisted pair no. 1 -->
-->
Twisted pair no. 4 <--
<--
Twisted pair no. 3 -->
-->
Twisted pair no. 2 -->
-->
J2-B Circuit GND
Shield -
J2-C RTS
Shield -
J2-D CTS
Shield -
J2-E DSR
Shield -
J2-F RLSD
Shield -
J2-H DTR
Shield -
J2-K LT
Shield -
J2-P SD+
J2-S SD-
J2-R RD+
J2-T RD-
J2-U SCTE+
J2-W SCTE-
J2-V SCR+
J2-X SCR-
J2-Y SCT+
J2-AA SCT-
Table C-13 lists the DTE pinouts. Table C-14 lists the DCE