Cisco 7000 Series Hardware Installation And Maintenance page 51

Physical Description
As
with
operation
RT
normal
RD
to
external
from
external
light
For
Figure
The
connect
SCSI-Il
guarantee
7000 Hardware
1-30 Cisco
the other interface
processors
LEDs
The above
four
TimingLights
Receive
this
operation
signal
generated
internally
DataLights
Receive
from
receive the external
packets
ST Send TimingLights
DSU
During normal
DSU
the external During loopback
connectedLights
indicate
to
DSU TA
DTE
and
when
HIP
the
is in
loopback
of the
complete descriptions
1-18
High-Speed
installation
Captive
HIP
interface
is
50-pin
port
HIP
the with an external
HSSI
format the
specification
reliable if
operation
and Maintenance
Installation
LED
Enabled
the
lights
HSSI
the
see
Figure
port
HIP
indicate the
to that
from
received the external
is
when
HIP
the detects packet
DSU
HIP
indicate the
to that
is
this is
operation signal
this signal
normal
operation
CA
DCE
and
available
mode when
is
nor it
LED
refer
to
Appendix
states
HSSI
Processor
Serial Interface
screw
SCSI-TI-type receptacle
DSU
HSSI
the
Although
more stringent than
is
used
SCSI-Il cable is
HIP
indicate the
to that
indicate the following
1-18
has detected receive clock
DSU
During loopback
and
indicates
traffic that
transmit clock
sending signal
from
derived the receive timing
is generated internally
HIP
the connected
is
properly
are active This
available
DSU
not connected the
to
HIP
HSSI
You need
interface
and
cable
are physically
port
SCSI-IT and
for
that
enabled for
is
During
signal
this is
signal
HIP
the able
is
the
to
RT
signal
the
to
LED
does not
cable
to
similar
to
we
cannot