On 01/26/12 16:33, Pierre-Yves Maunier wrote:
LX can work on both.
It can happends that SX works on singlemode but it can fail anytime.
LX over multimode fibre is documented on Cisco SFP/GBICs datasheets.
http://www.cisco.com/en/US/products/hw/modules/ps4999/products_tech_note0918...
Cisco 1000BASE-LX/LH SFPGLC-LH-SM1SFP-GE-L2Operates on standard single-mode fiber-optic link spans of up to 10 km and up to 550 m on any multimode fibers.
just because you can doesn't mean you should. we have experience multiple cases where LX-MMF-LX works great for 3-5+ years... then one day no longer gets link. swapping to a different fiber pair restores link. can't remember SX-MMF-SX failing after years of service. -- Steven Tardy Systems Analyst Information Technology Infrastructure Information Technology Services Mississippi State University sjt5@its.msstate.edu