Cisco 7513 Series, Hardware Installation And Maintenance Manual

Page: 137 / 289

Connecting
Interface
Cables
Figure
3-11
Single
Attachment
Station Single-Mode Fiber
Network
Connections
To
primary
ring
From
primary
ring
FC
connectors
Single-mode
single
attachment
Use two single-mode
cables for
single
attachment connection
Co
Figure
3-12
Single
Attachment
Station Multimode Fiber
Network Connections
To/from
primary
ring
Dual Attachment Connections
MIC
Multimode
single
attachment
Use
one
multimode
cable
for single
attachment
connection
CD
FIP
that is
connected
as
DAS
connects
to
both the primary
and
secondary rings
The
signal
for
each
ring
is
received
on one
physical
interface
PHY
or
PHY
and
transmitted
from
the other
The
standard connection
scheme
which
is
shown in
Figure
3-13
for
DAS
dictates that
the
primary
ring signal
comes
into the
FIP on
the
PHY
receive
port
and
returns
to
the primary
ring
from
the
PHY
transmit
port
The
secondary ring
signal
comes
into
the
HP
on the
PHY
receive
port
and
returns
to
the
secondary ring
from
the
PHY
transmit
port
Failure
to
observe
this
relationship
will
prevent
the
FDDI
interface
from
initializing
Figure
3-16
shows
the connections for dual
attachment
that
uses both
multimode and
single-mode
fiber
Figure
3-13
FDDI
DAS
Ports
Secondary
Primary
TX RX
PHY
PHY
FORMAC
Secondary
Primary
CCC
CC
CC
3-16 Cisco 7513 Hardware
Installation
and Maintenance