Thanks Justin... Faisal Imtiaz Snappy Internet & Telecom 7266 SW 48 Street Miami, FL 33155 Tel: 305 663 5518 x 232
Help-desk: (305)663-5518 Option 2 or Email: [email protected] ----- Original Message ----- > From: "Justin M. Streiner" <[email protected]> > To: "NANOG" <[email protected]> > Sent: Wednesday, February 11, 2015 12:41:23 PM > Subject: Re: MultiMode Fiber Connectivity... (850nm) Power Question > > On Wed, 11 Feb 2015, Faisal Imtiaz wrote: > > > I was looking for feedback on the following question:- > > > > When connecting two MM SFP/SFP+/XFP 's together...(short range). > > > > What should be the best practice receive power range ? > > SX (1G) / SR (10G) / SR10 (100G) gear generally has a receive threshold > that's higher than the maximum launch power. They are designed for > short-reach applications (in-building, data center, etc), so no > attenuation is needed. > > > Is it true that if the rx power is higher than (x?) then it shortens > > the life of the optics ? > > (assumption being made here is that MAX Rx Power is not being exceed as > > per the spec sheets of the optics) > > On short-reach optics, this should never be a problem. On long-reach > optics, receiver saturation will generally result in link errors/flaps, > and possibly high rx power warnings (depending on the gear on the > receiving end), however, these can be addressed using in-line attenuators. > > On very long-reach optics, such as ZX (1G) and ER/ZR (10G), it is possible > to damage the receivers with too hot of a signal because they are designed > for long spans and a certain amount of distance-based attenuation is > factored into the optical power budget. > > jms >
