3Com 3C16670 - LinkBuilder FMS II Hub - Bridged Token Ring with LinkBuilder MSH; Configuring the LinkBuilder MSH in a Token Ring Environment

Solution 2: Managed Token Ring Connectivity
Highlights
The LinkBuilder MSH Token Ring
modules provide an array of Token
Ring physical layer resilience fea-
tures unmatched in the industry.
Phase-Locked Loop (PLL) per-port
retiming, Zero Delay Lockout (ZDL),
and jitter reduction ensure a clean
signal and prevent beaconing nodes.
These features ensure greater relia-
bility across Token Ring networks,
support more devices over greater
distances, and ensure that devices do
not interrupt the network by insert-
ing into the ring at the wrong speed.
This solution exploits the
LinkBuilder MSH hub’s ability to
handle multiple Token Ring paths
running at 4 or 16 Mbps. The addi-
tion of a second RingBuilder
™
module allows the MAUs to be
divided into two Token Rings. The
Local Token Ring Bridge module
provides fully integrated bridging
between those rings—in this case,
between a 4 Mbps ring and the
16 Mbps imaging system ring.
®
RI/RO to 4 Mbps
Token Ring
path connections
2-Port Bridge
Module
Advanced MAU Modules
16 Mbps Token Ring
for document imaging 
system
4 Mbps Token Ring
RingBuilder
Modules
Token Ring backbone
Configuring the
LinkBuilder MSH
in a Token Ring
Environment
Use the following rules to configure
the LinkBuilder MSH for Token Ring.
• The Advanced MAU module
does not count as a station.
• The STP or UTP MAU module
counts as one station.
• The STP or Fiber RingBuilder
module counts as three stations.
• The maximum Level 5 UTP
cable lengths for the Advanced
MAU module are:
400 m lobes, 260 stations (4 Mbps)
200 m lobes, 260 stations (16 Mbps)
• The maximum STP cable
lengths for the Advanced MAU
module are:
600 m lobes, 260 stations (4 Mbps)
300 m lobes, 260 stations (16 Mbps)
• The maximum STP trunk cable
lengths for the RingBuilder
RI/RO are:
770 meters (4 Mbps)
346 meters (16 Mbps)
• The maximum UTP trunk cable
lengths for the RingBuilder
RI/RO, when used in conjunction
with approved media filters, are:
100 meters for Level 3 UTP
150 meters for Level 4 UTP
200 meters for Level 5 UTP
Products
LinkBuilder MSH Chassis with FDDI
Backplane (3C18041)
LinkBuilder MSH 525W Power Supply Unit
(3C18012)
LinkBuilder MSH Fiber RingBuilder
Modules (3C18240)
LinkBuilder MSH Advanced MAU Module
(3C18202)
LinkBuilder MSH 2-Port Token Ring Bridge
Module (3C18620)
LinkBuilder MSH Management Module
(3C18500)
Bridged Token Ring with LinkBuilder MSH
LinkBuilder Hub Configuration Guide 7