Installation guide

A-56 Cisco 4000 Series Installation Guide
Serial Cables
Figure A-11 Low-Speed X.21 Compact Serial Cable
Table A-22 Low-Speed X.21 DTE Compact Serial Cable Pinouts
Router End (200-Position Plug) Network End (15-Pin Connectors)
Pin Signal Note Direction Signal Pin
J8-75
J8-76
MODE_2
GROUND
Shorting
Group
–
J8-26
J8-25
MODE_DCE
GROUND
Shorting
Group
–
SHIELD_GROUND Braid SHIELD GND J0-1
J8-1
J8-2
O_TXD/RXD+
O_TXD/RXD-
Twisted pair #1 —>
—>
TRANSMIT+
TRANSMIT-
J0-2
J0-9
J8-16
J8-17
O_RTS/CTS+
O_RTS/CTS-
Twisted pair #4 —>
—>
CONTROL+
CONTROL-
J0-3
J0-10
J8-5
J8-6
I_RXD/TXD+
I_RXD/TXD-
Twisted pair #2 <—
<—
RECEIVE+
RECEIVE-
J0-4
J0-11
Pin 60
Pin 161
Pin 200
Pin 1
Molex LFH 200-pin connector
X.21 connectors
H7380