1000BASE-LX compatible with 100BASE-LX

[poirier.j]

                   I have a optical network designed over singlemode fiber. All my communication modules are based on the standard 1000BASE-LX, which is the GLC-LH-SM SFP module. However, I would like to add to my network an external component rated at 1310 nm and 100 Mbps, which is the same wavelength but a lower speed. This external component is not available on a Gigabytes speed and I am stuck with this one.

Can I connect them together, or do I have to change my SFP module with one based on the 100BASE-LX standard, like the GLC-FE-100LX ?

Also, do you have some good references where I could easily get this kind of information ?

Thank you for your time.

[Tom Randstrom · Accepted solution]

You will need to use a 100Mb module to connect to another device at 100Mb.

Check optical transceiver compatibility with your equipment by reviewing the following fast ethernet compatibility document:

http://m.mcisco.com/pocket.paper?url2=http%3a%2f%2fwww.cisco.com%2fen%2fUS%2fdocs%2finterfaces_modules%2ftransceiver_modules%2fcompatibility%2fmatrix%2fOL632702.html

There are 2 module types, one for GE and one for FE slots. Choose the one it says is compatible.

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