output of -2.7dBm is perfectly normal for a LX SMF SFP. The question is not how much power is being put out... the real question is how much power is being received ? (based on the the length of the cable and connectors one can determine if it is ok or if there is something wrong with the cable / connector / dirty or not seated properly.
Since each side is Tx on one strand, and Rx on the other strand, it is important to note the RX on each side of the link. 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: supp...@snappytelecom.net > From: "TJ Trout" <t...@voltbb.com> > To: af@afmug.com > Sent: Thursday, October 20, 2016 3:49:44 PM > Subject: Re: [AFMUG] CRS with sfp lockup > -2.7 any way I can lower the output? SM, I have some 7db attenuators I can > install? > On Thu, Oct 20, 2016 at 12:39 PM, Faisal Imtiaz < fai...@snappytelecom.net > > wrote: >> What are your light levels ? >> SM or MM ? >> 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: supp...@snappytelecom.net >>> From: "Chris Wright" < ch...@velociter.net > >>> To: af@afmug.com >>> Sent: Thursday, October 20, 2016 3:30:03 PM >>> Subject: Re: [AFMUG] CRS with sfp lockup >>> I’ve seen that same issue as you describe it between >>> CCR1036/CCR1016/CCR1009 and >>> Netonix switches. Tik says fiber is up at 1Gbps but no rx traffic. Netonix >>> detects the cable is plugged in but can’t get any traffic through. Toggling >>> SFP >>> to inactive/active usually fixes. Used Fiberstore Generic, Mikrotik, and HP >>> SFPs in the Mikrotik – no improvements one over the other. Netonix seems to >>> prefer HP SFPs. >>> Doing things like turning flow control on/off or changing speed negotiation >>> settings on the Mikrotik can induce this problem * sometimes * - depends on >>> what mood it’s in. No rhyme or reason when it fails at other times – >>> toggling >>> usually fixes it though. >>> Chris Wright >>> Network Administrator >>> From: Af [mailto: af-boun...@afmug.com ] On Behalf Of Adam Moffett >>> Sent: Thursday, October 20, 2016 12:19 PM >>> To: af@afmug.com >>> Subject: Re: [AFMUG] CRS with sfp lockup >>> I'm not saying this is the same problem....but I have a situation where a >>> Trango >>> Apex Lynx loses link to a CCR 1036. The SFP interface on the router says >>> there's link, but the SFP interface on the Trango says there isn't. The >>> problem >>> (in my case) occurs any time the Trango loses power. I can restore service >>> by >>> rebooting the CCR, unplugging and reconnecting the fiber cable, or disabling >>> and re-enabling the SFP interface. In this case I didn't have a good >>> picture of >>> what was happening at first because when it was happening I didn't have >>> remote >>> access to see the condition of everything. >>> The Apex Lynx has the JDSU SFP module sold by Trango. I've duplicated the >>> problem with 4 different SFP's in the CCR (Mikrotik brand, Maxxwave, JDSU, >>> and >>> Finisar), but I haven't tried changing the SFP in the Trango. I don't know >>> how >>> common this issue is....it only became apparent after a UPS failed. >>> ------ Original Message ------ >>> From: "TJ Trout" < t...@voltbb.com > >>> To: af@afmug.com >>> Sent: 10/20/2016 2:30:29 PM >>> Subject: [AFMUG] CRS with sfp lockup >>>> I have a mikrotik CRS210 with a non-mikrotik sfp which locked up last >>>> night, Not >>>> sure if it was the CRS or the sfp... >>>> Anyone encountered this and have a solution?
