Nortel Networks Media Dependent Adapter ユーザーズマニュアル

 

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For 1000BASE-LX multimode applications, the longwave 
gigabit transceivers must be mode conditioned externally 
via a special offset SMF/MMF patch cord. The offset 
SMF/MMF patch cord allows the same transceiver to be 
used for both multimode and single-mode fiber. See your 
Nortel Networks sales representative for more information 
about the SMF/MMF patch cord.

The 1000BASE-LX transceiver is designed to 
mechanically accomodate the single-mode ferrules used 
on one end of the special offset SMF/MMF patch cord. 
Multimode ferrules must not be used because they can 
bind and cause damage to the transceiver. Do not connect 
multimode cables directly into the 1000BASE-LX MDA 
transceiver. Instead, connect a special offset SMF/MMF 
patch cord into the transceiver, and then connect the 
multimode cable into the SMF/MMF patch cord.

For more information about gigabit transmission over fiber 
optic cable and mode conditioning, refer to the following 
publication:

Reference Note: Gigabit Ethernet Physical Layer 
Considerations (Nortel Networks part number 201540-B)

The publication is available on the World Wide Web at 
support.baynetworks.com/library/tpubs/

At the Web site, click on Accelar under the Routing 
Switches heading.

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