Hi All, Has anyone had any issues with Virgin Media Ethernet Extension Service 1Gbit/s handoff via single mode/LX SFPs? This is VMs EAD equivalent service ie DF with some Arcotronix NTEs on each end.
Basically on the morning of the final fit the engineer called me to check what handoff I wanted - I said single mode - he hesitated a bit and tried to encourage me to take Multimode SX. However we want LX/LH because that's what we standardise on and it gives us flexibility if we want to 'stretch' the circuit to somewhere else within 10km on our network. Anyway come the install they deploy SM with LX SFPs, the link between the sites is up the link light is on on their end of the LX link to us but our end won't light - we are terminating into a 6500 SUP720-3B at each end. We have proven that their optics work with ours by putting their optics in our kit and they light fine. We have tried our own optics in their kit, same result their end lights ours doesn't. VM are now trying to argue that it's because it's too close, ie below LX minima link (2m patch lead). However we know their optics light when in our kit and while I know it's a bit short and ultimately it's probably shortening the life of the optics but fundamentally I think it should work. To add fuel to the fire when they hand us off circuits from their Alcatel kit via SM (same optics) over 2m links it works fine. In a nutshell I think they are spinning me a line, especially as this is the second time in a month we have seen this, last time it was for a customer and they were happy with MM handoff. Has anyone else had a similar experience? Regards... Ben Sent from my iPhone
