Top Content CHAPTER 1. GENERAL INFORMATION

The SK-NET FDDI adapters attach computers to 100 Mbps Fiber Distributed Data Interface (FDDI) networks using fiber-optic cable, S/UTP or UTP (category 5) copper cable (STP is supported via a special Impedance Matching Cable).

The computer must be equipped with either a RISC/6000, a Power PC or an Intel 80286, 80386, 80486 or PENTIUM (compatible) microprocessor, and at least one available expansion slot. If you are installing a DAS adapter, two adjacent expansion slots are required (PCI DAS is an exception and requires only 1 slot).

At the moment, the range of SysKonnect FDDI adapters includes the following bus architectures:

This chapter contains information that should be read prior to the installation of the adapter.

Top Chapter OVERVIEW FDDI NIC CHARACTERISTICS

Product
Bus Architecture
Transmission Medium
single/ dual port
SK-NET FDDI-... Model
SK-...
EISA
ISA
MCA
PCI
UTP/ S/UTP
Fiber*
SAS
DAS
FE 5341
x
       
x
x
 
FE DAS 5342
x
       
x
 
x
UE 5321
x
     
x
 
x
 
UE DAS 5322
x
     
x
   
x
FI 5141  
x
     
x
x
 
UI 5121  
x
   
x
 
x
 
FM 5241    
x
    
x
x
 
FM DAS 5242    
x
   
x
 
x
UM 5221    
x
 
x
 
x
 
UM DAS 5222    
x
 
x
   
x
FP 5541      
x
 
x
x
 
LP 5543      
x
 
SC
x
 
LP DAS 5544      
x
 
SC
 
x
UP 5521      
x
x
 
x
 
UP DAS 5522      
x
x
   
x

* Normally, MIC plugs and transceivers. If marked SC, SC plugs and transceivers are used.

Please refer to the Release Notes for information on current changes (if applicable).

Top Chapter THE ADAPTER KIT

The adapter kit consists of the following items:

If any item is missing or damaged, contact your authorized reseller.

Figure 1.  SK-NET FDDI adapter kit (e.g. SK-NET FDDI-FE / SK-5341)
Figure 1. SK-NET FDDI adapter kit (e.g. SK-NET FDDI-FE / SK-5341)

Top Chapter HANDLING INSTRUCTIONS

Caution
Caution:

Static electricity can damage or destroy the adapter.

  • Keep the card in the anti-static package until it is ready to be installed.
  • Follow these handling instructions:

  • Hold the anti-static packaging containing the adapter against a metal expansion slot cover for at least 2 seconds. This action reduces any static electricity from the packaging and from your body.
  • Do not touch any exposed printed circuitry.
  • Do not place the adapter on the computer cover or any other metal surface.
  • Prevent other people from touching the adapter.
  • Limit your movement to reduce static-electricity buildup.
  • Always handle the adapter carefully.
  • If you need to put the adapter down, return it to the anti-static packaging.
  • We recommend the use of a static-protective wrist strap during installation. Connect it to the computer chassis after you have removed the cover from the computer.
    Note: Do not connect the wrist strap to the earth (ground) of your power supply, since this could potentially be live under unfavorable conditions!

Top Chapter ATTACHING SK-NET FDDI ADAPTERS TO YOUR NETWORK

A SAS adapter supports single attachment to a concentrator.
A DAS adapter supports either dual attachment to the main ring path or dual homing to one or two FDDI concentrators.

Note: Because of better EMI characteristics, fiber-optic components are preferable for dual attachment to the main ring path.

Figure 2. Possibilities of organizing an FDDI network
Figure 2. Possibilities for the Organization of an FDDI network

Note: The transceiver type of the concentrator slot(s) must match the transceiver type of the FDDI adapter(s) that are used (e.g. both fiber optic or CDDI TP-PMD/MLT-3).

Top Chapter Connection Types

There are three basic connection types that can be mixed and matched in the same network.

Top Chapter 1. Dual Attachment to the Dual Ring

Class A devices can be connected directly to the FDDI dual ring. A device connected to both rings is said to be dual attached. Since each ring has a transmit and a receive line, there are two transmit paths out of and two receive paths into the dual attached device (DAS in the previous figure). Because of the redundant data paths, dual attachment offers fault tolerance.

Top Chapter 2. Single Attachment to a Concentrator

Class B devices connect point to point to a concentrator. This connection type is known as single attached. For single attached devices, the concentrator acts as the central hub.

When SASs are connected to a single concentrator, the concentrator is said to be non-attached or stand alone. In this situation, the dual ring is collapsed into the concentrator.

Top Chapter 3. Dual Homing

Dual homing is a connection type for a Class A device where it is connected to two M ports (preferably different concentrators). The connection to one concentrator is the primary connection and is active; the connection to the second concentrator is for backup purposes and inactive. Since each connection to the concentrator has a send and a receive path, there are two transmit paths out of and two receive paths into the dual homed device. Because of the redundant data paths, dual attachment offers fault tolerance.

Concentrators which are connected to other concentrators building a tree below the dual ring are referred to as cascaded. Cascading applies to both single attached and dual homed concentrators.

Top Chapter Port Types (A, B, M and S)

The ports on the various FDDI devices are given logical names. There are four port types in FDDI: A, B, M (Master) and S (Slave).

Figure 3. FDDI port/transceiver types
Figure 3. FDDI Port/Transceiver types

Device Type Ports (Qty)
DAS A & B (1 each)
DAC A & B (1 each)
M (1 or more)
SAS S (1)
SAC S (1)
M (1 or more)
Stand Alone Concentrator M (multiple)

Top Chapter Port Usage in Dual Attached Connections

For a Class A device on the dual ring, the A port connects to the B port of the upstream neighbor and the B port connects to the A port of the downstream neighbor. This daisy chaining of devices continues around the ring.

For dual attached devices on the dual ring, the function of the A and B ports is described in the following table.

Dual Attached Device Port Function
A Primary Ring In
Secondary Ring Out
B Primary Ring Out
Secondary Ring In

Top Chapter Port Usage in Single Attached Connections

On single attached devices, the S (Slave) port connects to an M (Master) port on the concentrator.

Top Chapter Port Usage in Dual Homed Connections

For dual homed Class A devices, the A port connects to an M port on one concentrator and the B port connects to an M port on a second (or the same) concentrator.

For dual homed devices, the function of the A and B ports is described in the table below.

Dual Homed Device Port Function
A Secondary Connection
B Primary Connection

Top Chapter WHAT YOU NEED TO INSTALL THE ADAPTER

You will find a current list of all supported operating systems in the general README.TXT file on Diskette 1 (root directory) delivered with the adapter.

Top Chapter