https://community.extremenetworks.com/t5/extremeswitching-other/sfp-module-glc-sx-mmd-interoperability/m-p/9506#M534 In theory, they should work due to both optics are 1gig Multimode optics at ~850 nm and have a operating distance of ~550m. GLC-SX-MMD generally works with most Multimode optics, however it is always best to match optics on both ends of a link. Fri, 02 May 2014 00:59:00 GMT LeVar_Pulliam 2014-05-02T00:59:00Z https://community.extremenetworks.com/t5/extremeswitching-other/sfp-module-glc-sx-mmd-interoperability/m-p/9505#M533 I have a cisco switch 2960S PoE, i'm wondering if i can connect a <A href="http://www.router-switch.com/glc-sx-mmd-p-4958.html" target="_blank" rel="nofollow noreferrer noopener">GLC-SX-MMD</A> on a Cisco 2960S switch at one end and MGBSX1 on a SG300-28 SMB switch at the other end, will the link come up? Fri, 25 Apr 2014 07:33:00 GMT https://community.extremenetworks.com/t5/extremeswitching-other/sfp-module-glc-sx-mmd-interoperability/m-p/9505#M533 Lisa098 2014-04-25T07:33:00Z https://community.extremenetworks.com/t5/extremeswitching-other/sfp-module-glc-sx-mmd-interoperability/m-p/9506#M534 In theory, they should work due to both optics are 1gig Multimode optics at ~850 nm and have a operating distance of ~550m. GLC-SX-MMD generally works with most Multimode optics, however it is always best to match optics on both ends of a link. Fri, 02 May 2014 00:59:00 GMT https://community.extremenetworks.com/t5/extremeswitching-other/sfp-module-glc-sx-mmd-interoperability/m-p/9506#M534 LeVar_Pulliam 2014-05-02T00:59:00Z