Cabletron Systems 38 Manual De Usuario

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Document Conventions
FOMIM User’s Guide
1-3
 
1.2
DOCUMENT CONVENTIONS
 
The following conventions are used throughout this document:
 
1.3
FIBER OPTIC MEDIA INTERFACE MODULES
 
Cabletron Systems Fiber Optic Media Interface Modules provide a choice 
of six, twelve, or eighteen ports with ST connectors. 
 
1.3.1
Distance and Cable Type
 
The FOMIMs support single mode fiber optic cable for sizes such as 
8.3/125 
 
µ
 
m, 8.7/125 
 
µ
 
m, 9/125 
 
µ
 
m, 10/125 
 
µ
 
m, and 12/125 
 
µ
 
m. The 
cable distance is dependent on the cable type and the overall system fiber 
optic budget. If the system budgets and timing constraints are met, then a 
distance of up to 5 kilometers is possible. You can also use 62.5/125 
 
µ
 
multimode cable with the FOMIM, but due to greater optical loss, signal 
distance is reduced to 2 km. 
NOTE
 
Note
 
 symbol. Calls the reader’s attention to any item of 
information that may be of special importance.
!
C AUT IO N
 
Caution
 
 symbol. Contains information essential to avoid 
damage to the equipment.
 
Warning
 
 symbol. Warns against an action that could result in 
equipment damage, personal injury or death.
NOTE
 
The FOMIM-32/36/38 use 1300 nm wavelength transmitters 
and receivers (not the 850 nm specified by FOIRL) and should 
be used only with the Cabletron Systems Ethernet single mode 
transceiver, the FOT-F3.