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Cable
Serial
Pinoüts
Cabe Assemby
X.21
Figure
signal descriptions
J1-33
Ji -17
J1-1
J1-18
J1-34
Figure
Table A-9
72-0683-02
From
Jl-5
Jl-36
Jl-41
Jl-25
Jl-41
Jl-25
Jl-43
Jl-27
Jl-l
Jl-34
J1-4
J1-20
Jl-35
Jl-19
Ji-lO
Jl-26
Jl-2
Jl-18
Any
A-la
Cisco 3000 Hardware
Installation
A-5 shows
X.21
the
cable
assembly
A-5
Cable Assembly
X.21
X21 DTE
Cable
Serial
Pinouts
Connections1
To
Signal
Type
MUXSEL
Jl-38
449GND
J2-8
DTR
449
Jl-6
Jumper
Jl-22
DTR
449
Jl-8
Jumper
Jl-24
SCTE
449
Jumper
Jl-37
Jl-21
TXD
449
Twisted
Pair
J2-2
J2-9
RTS
449
Twisted
Pair
J2-3
J2-l0
RXD
449
Twisted
Pair
J2-4
J2-ll
RLSD
449
Twisted
Pair
J2-5
J2-l2
SCT
449
Twisted
Pair
J2-6
J2-l3
not referenced
on
connector
pin
is
and
Maintenance
and
A-9 and
Table
Table
Ji
connector
50-pin
J2
connector
15-pin
and
Signal
Descriptions
Signal
GND
X21GND
CTS
449
DSR
449
SCR
449
TXD
X.21
CTL
X.2l
RXD
X.21
IND
X.21
CLK
X.21
not connected
A-b
and
the cable
list
pinouts
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