Data General AViiON Series, Клиентская документация

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Connecting External Devices to VME Option Boards
4-38
014–001867
Once you have decided which type of connection you will use –– single-attachment
or dual-attachment –– select the cables you will need for your installation.
Table 4–12 lists and describes the fiber–optic cables available from
Data General Corporation.
Your VFC board includes or supports ST-compatible optical connectors (jacks); it
therefore requires cables with bayonet plug connectors on the host end. The type of
cables you use depends on the connectors your receiving devices require; most
concentrators and bridges require Media Interface Connector (MIC) connectors at
their end of the VFC cable(s).
Table 4–12 VFC Fiber–Optic Cables
Connector Type Model
Number
Length
(m)
40567 5
ST to ST
(VFC to VFC)
40561 10
40564 20
T to C
40566 5
ST to MIC*
(VFC to concentrator
or bridge)
40560 10
40563 20
40565 5
C to C
40559 10
MIC to MIC*
(Optical bypass switch
to data link)
40562 20
* Media Interface Connector.
NOTE: Single–attachment stations must use the Tx/Rx pair labeled “PHY B.”
Determining Tx and Rx Cable Strands
All the fiber–optic cables consist of two separate strands, often joined together. One
strand carries signals transmitted by the VFC; the other carries those signals
received by the VFC. Since they are keyed to attach in only one way, MIC
connectors eliminate the need for you to determine the correct transmit and receive
connection.