INTRODUCTION
1-4
Features of the concentrator module include:
Number of Connections
•
TRMIM-22A
12 - Unshielded RJ-45 ports
•
TRMIM-42A
12 - Shielded RJ-45 ports
•
TRMIM-24A
24 - Unshielded RJ-45 ports
•
TRMIM-44A
24 - Shielded RJ-45 ports
Multiple concentrator modules can be installed into an MMAC to
increase the number of UTP/STP ports available on a token ring
network.
Distance and Cable Type
The
active
TCU ports regenerate, reshape and filter the incoming
signal permitting UTP lobe cable lengths of up to
100 meters
and
STP lobe cable lengths up to
200 meters
at 16 Mbit/s ring speed.
The UTP concentrator modules support voice grade Unshielded
Twisted Pair (UTP), categories 3, 4 and 5 cabling. The STP
concentrator modules support IBM type 1, 2, 6, and 9 STP cabling.
Detailed specifications for supported cable types and lengths are
listed in Chapter 2,
Installation Requirements/Specifications.
Cable Signal Polarity
Differential Manchester encoding is utilized for each of the
concentrator module TCU ports. This permits passing data
regardless of receive link polarity.
Note:
If a reversed polarity condition is discovered, the segment should be
removed from the network and wired correctly (according to the connector
wiring shown in
Chapter 2, Installation Requirements /
Specifications
). This will avoid the potential for future compatibility
problems.
