Conversion Modules; Mcc-Frio; Mcc-Dfl - Cabletron Systems MCC-16 User Manual

Token ring media conversion center

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INTRODUCTION

1.2 CONVERSION MODULES

Each CM has at least two RJ45 receptacles that can be used for attaching

the cable from a Token Ring station, such as a switch. CMs that have

RI/RO capability allow the connection of RI ports to RO ports

(and vice versa) on other devices to extend the ring. The RI/RO ports are

compatible with all 802.5 compliant devices including passive MAUs.

By using different CMs in the MCC-16, the installation can contain RI,

RO, lobe, and station ports of either multimode ﬁber or twisted pair cable

to meet the needs of almost any topology.

The MCC-16 backplane supplies the power for the CMs. Each

NOTE

CM provides media conversion and/or port-type switching per

module.

The MCC-FRIO, with RI/RO capabilities, has a set of ﬁber

ST RI/RO ports that can connect to RI/RO ports on other devices

(e.g., TDRMIM-AT, TRFOT-2, or TRRMIM-4AT) to extend the ring. The

module also has two lobe ports to connect stations. Thus, stations

connected to either lobe port can communicate across the RI/RO

connections to other parts of the ring, and they will also communicate

with each other.

The MCC-DFL has two Fiber Optic Transceivers (FOTs). Each FOT has a

twisted pair and ﬁber ST port. This allows signals transmitted over the

twisted pair to be converted into optical signals for transmission over

multimode ﬁber. You can conﬁgure each FOT as a RI/RO device or a

station/lobe device. A switch can be set so that connections can be made

to an 802.5J compliant device.

Cabletron Systems offers complete compatibility with vendor

NOTE

products that comply with the "new" 802.5J standard for ﬁber

RI/RO ports. Therefore, the MCC-16 offers connectivity to

products using 802.5J or Cabletron Systems ﬁber keying.

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