Specifications

CONTENTS
iv
TOKEN RING MANAGEMENT......................................................................................2-22
FRAME TYPES .............................................................................................................2-25
Fill Sequence ..........................................................................................................2-25
Abort Format ...........................................................................................................2-26
Token Format ..........................................................................................................2-26
Starting Delimiter (SD)......................................................................................2-27
Access Control (AC) .........................................................................................2-27
Ending Delimiter (ED).......................................................................................2-28
Data Frame Format.................................................................................................2-28
Start of Frame and End of Frame Sequences ..................................................2-29
Destination Address (DA) .................................................................................2-30
MAC Frame Format.................................................................................................2-31
Configuration Report Server.............................................................................2-35
Ring Parameter Server.....................................................................................2-36
Ring Error Monitor ............................................................................................2-36
CHAPTER 3 TOKEN RING DEVICES AND APPLICATIONS
TOKEN RING DEVICES..................................................................................................3-1
Multi-Media Access Centers (MMACs) .....................................................................3-1
Concentrators............................................................................................................3-2
Ring In/Ring Out (RI/RO) Devices.............................................................................3-2
Media Flexibility and Conversion...............................................................................3-3
Switches and Bridges ...............................................................................................3-3
Token Ring Management Modules............................................................................3-4
EXPANDING A TOKEN RING NETWORK......................................................................3-4
MULTIPLE TOKEN RINGS IN ONE MMAC.....................................................................3-5
BRIDGED TOKEN RING NETWORKS ...........................................................................3-6
CHAPTER 4 TOKEN RING NETWORK CABLING
TERMINOLOGY..............................................................................................................4-2
STP CABLE SPECIFICATIONS ......................................................................................4-4
STP Construction......................................................................................................4-4
Recommended Maximum Cable Lengths and Stations ............................................4-4
Cable Connectors .....................................................................................................4-6
Medium Interface Connector (MIC) ....................................................................4-6
DB9 Connector ...................................................................................................4-6
RJ45 Connector..................................................................................................4-7
UTP CABLE SPECIFICATIONS ......................................................................................4-7
UTP Construction......................................................................................................4-7
Recommended Maximum Cable Lengths and Stations ............................................4-8
Fiber Optic Cable Specifications......................................................................................4-8
Fiber Optic Construction ...........................................................................................4-9
Fiber Optic Types ......................................................................................................4-9
Recommended Maximum Cable Lengths and Stations ..........................................4-10