TOKEN RING FIBER EXTENDERS
16
Figure 3: Station to Station / Switch to Switc
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4.3
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Fiber Trunk Link Between Concentrator
For links between switch concentrator ports or to interconnect two Token Ring
networks via the TCU port, the LCL112A-TRs should be configured as shown in
Figure 4.
Note: In this mode the LCL112A-TRs attempt to insert into the copper port
immediately. If the copper port of the MAU needs to see valid data before insertion is
permitted this method of operation will not work if both ends connect to such MAUs.
This configuration is only recommended for links between passive
MAUs.
Figure 4: Concentrator Port to Concentrator Port
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4.4
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Ring In to Ring Out
For links in the main ring path the LCL112A-TRs can be used in trunk mode. For
maximum compatibility the ACL (phantom current) should be switched off on both
LCL112A-TRs and the attached ports of the MAU. Phantom current can only be used
in this mode for devices operating with phantom current in exactly the same manner.
