8226 Installation and Planning Guide in IBM Library *.boo format
Brochure IBM 8226 Token-Ring RJ-45 Connection Model 001
194-344 IBM 8226 Token Ring RJ45 Connection Model 001
8226 TR RJ45 Connection
The 8226 is a passive token ring access unit that
connection for attaching workstations and other token
ring devices to a 4
or 16 Mbps token ring network using Category 4 or 5 UTP
cabling. It is powered so that it can reset port
The 8226 can be placed on a level surface or wall
mounted. Can be used
as a splitter (fanout) or concentrator.
Eight passive RJ45 token
ring ports (no re-clocking or re-drive). Auto sensing
PSU, 100 or 240 V ac / 50 or
60 Hz. Supports 4 and 16 Mbps Token Ring.
Has status and power
LEDs. Does not require media filter at the 8226.
|1 - 8
||Active device connected to RJ45
||No active device connected to RJ45 port.
||8226 receiving power from electrical
||8226 not connected to AC, or problem w/
power cord or supply.
The stand-alone ring
The IBM 8226 can be used as a stand-alone ring,
by attaching up to eight workstations or devices to the
8226's RJ-45 ports.
8226 Ring Limits
IBM 8226s can also be used together by cabling up
to ten 8226s via their Ring-In/Ring-Out (RI/RO) ports
and then attaching
up to eight workstations to each 8226's RJ-45 ports.
Allows to use the 8226 as a splitter when attached mode
switch to another 8226 or as a concentrator.
Instead of using a separate hub or
concentrator port for each device you want to connect, you
can attach the
8226 to an existing hub or concentrator port, set the
switch on the front
of the 8226 to "Splitter," and connect up to eight
additional devices to the 8226.
Some words about Cable length
In general, as the main ring path grows longer, the
maximum length of the
longest lobe (the cable from the 8226 to an attaching
Although rings that violate these rules may
work satisfactorily, when a problem does occur,
recovering the network according to the procedures in
the manual IBM Token Ring Network Problem Determination
Guide may not be
possible. In order to determine whether or not the
segment meets the guidlines,
you should use the formula :
(sum of MPR cables - shortest MPR cable) + LLL should
be <= 145m (478 feet) for 4 Mbps - or -should be
<= 290 meter (957 feet) for 16 Mbps
MPR = Main Ring Path LLL = Longest Lobe Length
If the ring has e.g. three 8226s connected with cables
of 40 m (132 ft), 60 m, (165 ft) and 80 m (264 ft) with
a longest lobe length of 50 m
(165 ft), distance of 95 m (313 ft), it falls within the
guidlines. However, if these distances where all
doubled, the transmission distance would be 190
m (627 ft), clearly in violation of the maximum distance