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6-2
Selecting a Topology
Topology:
Star
Daisy Chain
Ring
Publication 1756-TD008A-EN-P - August 2002
The first step to using fiber media is to analyze your application and
determine the topology of your SynchLink system. Table 6.1 offers a
brief description of each SynchLink topology. For more information
on each of the SynchLink topologies, see Chapter 2, SynchLink
Topologies.
Table 6.1
SynchLink Topologies
Brief description:
A hub is placed in the physical center
of the link. Nodes are connected to
the hub like points on a star, and each
node has a direct, dedicated line to
the hub. Highlights include:
· Up to 17 hubs (1 primary and
16 secondary)
· Up to 257 nodes (1 Master,
256 Slaves)
· 300m cable segment length
(between any 2 nodes)
System starts at the Master Node
and ends at an End Node. You can
also include Center Nodes that
receive and transmit data as needed.
Highlights include:
· Up to 10 nodes, beginning at
Master Node and ending at End
Node
· 300m cable segment length
(between any 2 nodes)
Permutation of the daisy chain
configuration. In the ring
configuration, the SynchLink network
starts and ends at the Master Node.
Highlights include:
· Up to 10 nodes, beginning and
ending at Master Node
· 300m cable segment length
(between any 2 nodes)
Advantages:
· Cabling is easier to
install and
maintain.
· If a node fails, is
powered down, or
disconnected from
the hub, it is the
only node affected.
· Faults are easier to
locate and isolate.
· Topology does not
require a hub.
· Offers a bypass
switch, so you can
keep the link
running while one
or more nodes are
temporarily
powered down.
· Topology does not
require a hub.
· Offers a bypass
switch, so you can
keep the link
running while one
or more nodes are
temporarily
powered down.
Disadvantage:
The hub is a single-point of
failure.
A node failure will bring
down the entire link.
A node failure will bring
down the entire link.
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