Using the BayStack 450 10/100/1000 Series Switch
C-22 309978-D Rev 01
1000BASE-LX Multimode Applications
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 accommodate 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 (Part number 201540-B).
The publication is available on the World Wide Web at:
www25.nortelnetworks.com/library/tpubs/
At the Web site, click on Accelar under the Routing Switches heading.
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