Cisco AGS+, Hardware Installation And Maintenance

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Applique
and Cable
Pinouts
On
both the
DTE
and
DCE
RS-449
appliques pin 10
carries
the
local loopback
LL
signal
Use the
software
configuration
subconimand
loopback
to
invoke
loopback
to
check
out your
installation
or
to verify
that
the applique
is functioning correctly
The loopback command
will assert pin 10
LL
in
DTE
mode
and
will
loop the
Send Data
SDA
and
SDB
signals
to the
Receive Data
RDA
and
RD
signals
If
the
DCE
applique ever
gets
the loopback
pin
pin
11
asserted by
the
DTE
device
it
will loop
SDA
and
SDB
to
RDA
and
RDB
Following is
sample
output of the
loopback
command
for
serial
Router
configure terminal
Enter configuration commands
one per
line
Edit with DELETE
CRTL/W
and
CRTL/U
with CTRL/Z
interface serial
loopback
AZ
P.outer write memory
bk
Router
The no loopback
command
returns
the
interface
to
normal
function
Figure
A-il
RS-449 DIE AppliqueComponent-Side
View
Cabling Specifications
A-li