M And S Keying; Connecting The 3F00-01 Or 3F55-01 To The Network; Pre-Connection Information - Cabletron Systems 3F00-01 User Manual

Chapter 2: Connecting to the Network

2.3.2 M and S Keying

MICs on concentrators are keyed as type M MICs to connect to a master
port (for the attachment) of stations or other concentrators, and type S
MICs to connect to a slave port (for attachment to the FDDI network).
For M port connections the MIC key slot runs along the center of the
connector.
2.4 CONNECTING THE 3F00-01 OR 3F55-01 TO THE
NETWORK
Caution: Power-off the ATX before connecting the 3F00-01 or 3F55-01
to the network. Failure to disconnect power will result in damage to the
module. The steps for connecting a 3F00-01 or 3F55-01 to the network
are the same.
The 3F00-01 and 3F55-01 connect the ATX to the FDDI network as a
dual-attached station, dual-homed single-attached station, or
single-attached station. Use the appropriate 3F00-01 or 3F55-01; either
the multimode version or single mode version, depending on the type of
fiber used for the network.

2.4.1 Pre-connection Information

Check that MICs are correctly keyed as A and B MICs for connecting
DAS ports.
If MICs are keyed incorrectly, the FDDI network may continue to
function, but the incorrectly connected station will not function. The dual
ring will "twist around," bypassing the faulty connection. The ring
configuration LED on the 3F00-01 or 3F55-01 (either the THRU or
WRAP LED) will blink.
Before connecting the FDDI cable, inspect the MIC plug and receptacle
contact points to make sure they are clean. (To protect fiber ends from
dust or other contamination, always keep the open ends of unused MIC
plugs and receptacles covered with a dust cover.)
Caution: Only properly trained personnel should attempt to fabricate an
FDDI cable assembly or polish fiber cable terminations.
Page 2-10 FDDI Dual-Attached Intelligent Module User's Guide