Nortel Networks Installing Media Dependent Adapters Manuel d'utilisateur télécharger pdf (Page 44)

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 (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 Passport 8132 under the Routing

Switches heading.

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Nortel Networks Installing Media Dependent Adapters Manuel d'utilisateur Page 44