Cisco XENPAK-10GB-SR supports a link length of 26m on standard FDDI grade MMF. Up to 300m link lengths are possible when using 2000 MHz/km MMF (OM3). Up to 400m link lengths are possible when using 4700 MHz/km MMF (OM4). We supply Cisco equivalent XENPAK-10G-SR fiber optic transceiver.