Cisco AGS+, Hardware Installation And Maintenance

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Applique
and Cable
Pinouts
X.21
Dual-Mode
Applique
The X.21
applique
which
is
designed
for domestic
and
international
use meets
the
CCI1T
specification
for
DTE VDE
Class
and
FCC
Class
CSA
Cl08.8 The
applique can
be
set for
either
DTE
or
DCE
mode
with default
mode
as
DTE
Change the
mode
to
DCE
by
changing
the
position
ofjumpers Ji J2 and J3
See
Figure
A-
12
All three
jumpers must be
in
the
same
position
DCE
or
DTE
in
order
for
the applique
to
operate properly
Jumper J4 connects
logic
ground
to
chassis ground
when
in
the default position See
Figure
A-
12
Special
DTE
and
DCE
cables are
required for
DTB
or
DCE
operation
Table
A-
15
lists the pinout
for the
dual-mode X.21
applique
Jumpers
Jumpers
Figure
A-12
X.21 Applique
with Jumpers Set
for
DCE
OperationComponent-Side
View
Table
A-15
X.21 Applique Pinout
Direction
Pin
DTE Mnemonic/Function
DIE
DCE
Pin
DCE
Mnemonic/Function
Shield
Drain
Shield
Drain
TxD
Transmit
Data
RxD
Control
Indicate
RxD
Receive
Data
TxD
Indicate Control
RxC
Receive
Clock
DCE
Clock
DCE
Clock
a1
RxC
GROUND
GROUND
TxD
Transmit data
11
RxD
10
Control 12
Indicate
11
RxD
Receive
Data
TxD
12
Indicate
10 Control
13
RxC
Receive
Clock 14
DCE
Clock
14
DCE
Clock b1
13
RxC
15
These
signals go
to the
DCE
device
only
when
the jumpers are
set
for
DCE
and the
DCE
transition
cable
is
used
oJ4
00
DTE
00
Ioool
to1
00
ID
00
DCE
00
00
00
00
00
00
Cabling Specifications
A-19