I have a couple P(E)-4OC3-SON-SMIR that I purchased used and successfully ran in a production network in the 2007-2009 timeframe. Then, about 5 years ago the OC3 links were taken out of service and the PICs sat in their routers (an M10 and an M20) for 4-5 more years doing nothing.
The ports were set "disable" but the PIC was online, so I believe the optical transmitters were still active. Now I'm trying to reussurect them for lab use and I cannot for the life of me get them to link up back-to-back. Only one port out of eight will even go "green" when looped to itself with a 1m patch cable. None will link port-to-port. LOL clears and I get PLL lock, but then either LOS or LOF, AIS, BERR, etc on both sides. I've tried: -multiple patch cables (yes they're SMF) -cleaning the cables' SC connector with tissue/alcohol -blowing canned air into the ports on the PIC -5 & 10db optical attenuators in case it was rx overload even though that shouldn't matter -verifying tx/rx strands and swapping just in case -every combination of clocking,enable/disable scrambling, crc16/32, etc -JUNOS 10, 11, and 12 in both M10 and M20 with FPC-E Unfortunately I don't have a light meter. But I'm starting to think the transmitters might just be toast and not pushing enough light to present a usable signal to the other end even with only a 1m patch. http://www.juniper.net/techpubs/software/junos/junos85/swconfig85-network-interfaces/id-12763130.html says: "To extend the life of the laser, when a SONET/SDH PIC is not being actively used with any valid links, take the PIC offline until you are ready to establish a link to another device. To do this, issue the request chassis pic offline fpc-slot slot-number pic-slot slot-number operational mode command" Is this a real thing? Is 10-15 years in the expected usable lifetime of a circa-2001 1310nm laser? -Will Orton _______________________________________________ juniper-nsp mailing list juniper-nsp@puck.nether.net https://puck.nether.net/mailman/listinfo/juniper-nsp
