Cisco 7000 Series Hardware Installation And Maintenance page 102

To/from
primary ring
Figure
Dual Attach Connections
FTP
rings
transmitted
DAS
dictates
to the
PRY
the
observe
connections
Secondary
Primary
Figure
SAS
Attach
3-9 Station
Single
connected dual-attach
that as
is
The
signal for each received
ring
is
from The
the other standard
the primary
that ring signal
PRY
from
the
primary ring
Receive port returns
to
this will
relationship prevent
dual attachment
for
TX
PHY
FORMAC
DAS
FDDI
3-10 Ports
Multimode Network Connections
Fiber
DAS
connects
station
on one
physical interface
scheme which
connection
comes FTP on
the
into
The
Transmit
port secondary
from
the
the
ring
secondary
FDDI
from
the interface
multimode and
uses both
that
RX
Secondary
PHY
Primary
Connecting
both the primaly and
to secondary
PHY PHY
and
or
shown
in Figure
3-10
is
PHY
and
Receive
the port
comes
the
ring signal into
PHY
Transmit Failure
port
shows
3-13
Figure
initializing
single-mode fiber
Installing
Cables
Interface
for
returns
FTP on
to
the
Router
the 3-13