3Com 3C18320 User Manual

FDDI MIC M
3C18320

EDIA

M

ODULE

U

SER

G

UIDE

Interworking Information

The 3Com® FDDI MIC Media Module has been designed to the
ANSIX3T9.5 PMD standard.

The FDDI MIC Media Module can transmit (Tx) and receive (Rx) FDDI
100Mbit/sec traffic over multi-mode Fiber Optic cable.

The FDDI MIC Media Module is used to provide connectivity to FDDI fiber
medium on the following LinkBuilder® products:

■ MSH FDDI RingBuilder Module (3C18310)

■ MSH LinkSwitch Module (3C18640)

■ FMS II LinkSwitch Hub (3C16640)

Installation

Keying your FDDI

Connectors

WARNING:

Only qualified personnel should install this device. Use an

earthed wrist-band!

Keys are provided to enable you to set up M, S, A or B connector keying
on the FDDI MIC Media Module. The connectors on the fiber cable will
have, or can be set up to have, matching keys.

Your key selection should be guided by the following definitions. Full details
are given in the LinkSwitch and RingBuilder module manuals.

Code Key Type

A Used for dual-attached and dual-homed connections, primary

in/secondary out

B Used for dual-attached and dual-homed connections, secondary

in/primary out.
M Used for single-attached connections, master or concentrator port.
S Used for single-attached connections, slave or workstation port.

Select the key you want. With the key letter upmost, push the key into the
key way in the case of the launcher (see Figure 1) until the latches click
into place.

Figure 1

Inserting a key

To remove a key, you need to lift the inner bar and depress the center lug
to disengage them before withdrawing the key (see Figure 2). Do NOT use
excessive force!