The only suggestions I have is to check the basics.
· Patch lead is Multimode and single mode? · Swapped the patch leads individual leads around? · Tried a different patch lead? · Hold a piece of paper up to the LC2 ports.. can you see the laser light on it? If not then check the remote ends connections etc. I’m a bit confused with the loop between LC1 and LC3. What is this for? If the other end is the same it serves no purpose? From: Harry Singh [mailto:[email protected]] Sent: Thursday, 25 March 2010 5:47 AM To: NT System Admin Issues Subject: OT: FIber Question All: It's been ions since I've worked with Fiber and I'm stuck off-site trying to figure something out and could use some feedback. We ran Multi-Mode 62.5 Microns 6 strand fiber between two remote locations. At each location is a 3com 4500 switch which has a dual-personality SFP slot and a SC 1000BASE-SFX Transeiver plugged-in and recognized by the switches. Specifically this transceiver: http://www.3com.com/products/en_US/detail.jsp?tab=features&pathtype=purchase&sku=3CSFP91 The fiber runs (not my doing) were run with LC connectors and the switch supports SC only. I've purchased a single LC->SC patch cable and have it plugged up on both ends, but no dice. I'm not sure if i'm forgetting a fundamental connection requirement with MMF, but hoping a few of you could shed some light. I've copied a link to the image of the Fiber termination in my rack at the bottom of this email. There are 3 LC connections in the picture. I have a LC/LC patch connected between, for this discussion, the LC1 and LC3 while LC2 is connected into the switch via the LC/SC patch. This connection topology is mirrored on the remote side and no dice. I figure to connect the LC cables from LC1 to LC3 to complete the loop, per se. I've tried direct connections from all LC ports into the switch without the rest of the cables connected and nothing happens. e.g. I can't ping any devices on the either side and i don't see an activity light on the switchport (FYI ports have been set as trunk ports and permitting all vlans) http://s396.photobucket.com/albums/pp44/sipe3202/Tech/?action=view¤t=IMG00086-20100324-1340.jpg Cheers, Harry ~ Finally, powerful endpoint security that ISN'T a resource hog! ~ ~ <http://www.sunbeltsoftware.com/Business/VIPRE-Enterprise/> ~
