Re: [uknof] CWDM Advice needed
Standard optics should be fine... s/should/may/ I have a pair if 11 channel mux/demux's which include wavelength 1310nm. If that is a 20nm wide cwdm port then the sfp needs to be on 1310 +/- 6.5nm, ie a CWDM part. A typical LR part is free to roam between 1270 - 1360nm so chances of working are slim. If you have a wide 1310 port, typically called an expansion port on cwdm mux and intended for cascading to a further 8 channels then it will be wideband enough for LR. As you have 11 channels I suspect you have a CWDM 1310 port and thus will need a CWDM SFP (manufacturers often split the CWDM channels into two banks of 8 so you can add the second set later, if they have more than 8 they are likely using all the channels and skipping the high water loss ones) I'm talking to now two suppliers, one in china who supplied the mux's and one in Europe. Get a spec of the mux otherwise you're guessing. One supplier is saying I can use standard sfp optics as they use 1310 nm on my 1310 port and these are cheap as chips! However the other supplier is saying that these won't work as they are not as finely tuned and say I need cwdm 1310 optics which are considerably more expensive! Both are cheap as chips if you buy from china or Flexoptix brandon
Re: [uknof] CWDM Advice needed
It depends on the separation of 1310 channel from the other colours, we use 1+8 Mux's (1310 with the 'standard' 1470-1610 8 ports), and standard LX is fine in the 1310 ports. However if you have colours close to 1310 (1330 or 1350 for example), then a normal LX will stamp all over the surrounding colours. The same applies if you try and use a 1550 ZX or ER optic in a 1550 CWDM port. I hope that helps... Regards... Ben Sent from my iPhone On 11 Sep 2014, at 01:49, Joseph Waite joeli...@hannontelecom.net wrote: Looking for some advice here. Deploying cwdm onto a dark fibre link in next few weeks. I have a pair if 11 channel mux/demux's which include wavelength 1310nm. I'm talking to now two suppliers, one in china who supplied the mux's and one in Europe. One supplier is saying I can use standard sfp optics as they use 1310 nm on my 1310 port and these are cheap as chips! However the other supplier is saying that these won't work as they are not as finely tuned and say I need cwdm 1310 optics which are considerably more expensive! Can anyone here advice which is correct? Regards Joe Waite
Re: [uknof] Belfast
Yes! Thanks to all involved, what a great meeting and a darn good time. Cheers, ~Chris On Wed, Sep 10, 2014 at 10:18 AM, David Farrell d...@davidfarrell.ie wrote: Folks, It was absolutely *fantastic* to be part of the last two days in my adopted home town. I hope those who made it enjoyed Belfast and the rest. Cheers, David. -- @ChrisGrundemann http://chrisgrundemann.com
Re: [uknof] CWDM Advice needed
On 11 Sep 2014 14:06, Brandon Butterworth bran...@bogons.net wrote: Standard optics should be fine... s/should/may/ Well I'd certainly try this first with a stock inventory part before spending unnecessary money on the expensive vendor optic... I have a pair if 11 channel mux/demux's which include wavelength 1310nm. If that is a 20nm wide cwdm port then the sfp needs to be on 1310 +/- 6.5nm, ie a CWDM part. A typical LR part is free to roam between 1270 - 1360nm so chances of working are slim. Kind of. But not really free to roam... The receivers are indeed wideband but the transmitters use a laser which is a single frequency light and will not vary much. Vendors do give different tolerances for what the actual wavelength transmitted will be and this will fluctuate slightly due to the manufacturing process or temperature and indeed an optic sold as cwdm will have been checked against a tighter limit but I'd be shocked if you're buying LR that isn't almost exactly 1310. Steve If you have a wide 1310 port, typically called an expansion port on cwdm mux and intended for cascading to a further 8 channels then it will be wideband enough for LR. As you have 11 channels I suspect you have a CWDM 1310 port and thus will need a CWDM SFP (manufacturers often split the CWDM channels into two banks of 8 so you can add the second set later, if they have more than 8 they are likely using all the channels and skipping the high water loss ones) I'm talking to now two suppliers, one in china who supplied the mux's and one in Europe. Get a spec of the mux otherwise you're guessing. One supplier is saying I can use standard sfp optics as they use 1310 nm on my 1310 port and these are cheap as chips! However the other supplier is saying that these won't work as they are not as finely tuned and say I need cwdm 1310 optics which are considerably more expensive! Both are cheap as chips if you buy from china or Flexoptix brandon
Re: [uknof] Belfast
And Belfast was utterly awesome. Anyone that didn't fancy leaving Britain to get over there really did miss out. Erm.. I hate to break it to you, but Belfast is in Britain. We might not be able to say the same about Scotland soon :-(, but Northern Ireland is still part of Britain. Charlie Boisseau Fluency Communications Ltd T: +44 (0) 330 121 1000 Twitter: @charlieboisseau www.fluency.net.uk char...@fluency.net.uk On 10 Sep 2014, at 21:32, Tom Hill t...@ninjabadger.net wrote: On 10/09/14 11:10, Will Hargrave wrote: Absolutely! I was pleased to see so many folks from south of the border too, and the interesting Ireland-related content. Yes, this: it was great to have such an interesting integrated meeting of the two isles. The ION conference added another helping of great people, too. And Belfast was utterly awesome. Anyone that didn't fancy leaving Britain to get over there really did miss out. I'd like us to go back as soon as possible, please. :) Thanks for being such a good host as well, Dave! Tom
Re: [uknof] Belfast
We might not be able to say the same about Scotland soon :-(, but Northern Ireland is still part of Britain. If this happens, connectivity to NI might get very interesting though! (/ref: Neil) Chris website: www.knowledgeit.co.uk | blog: www.knowledgeit.co.uk/blog | twitter: @KnowledgeITUK Knowledge Limited, Company Registration: 1554385 Registered Office: New Century House, Crowther Road, Washington, Tyne Wear. NE38 0AQ Leeds Office: Viscount Court, Leeds Road, Rothwell, Leeds. LS26 0GR Tel: 0845 142 0020. Fax: 0845 142 0021 E-Mail Disclaimer: This e-mail message is intended to be received only by persons entitled to receive the confidential information it may contain. E-mail messages to clients of Knowledge IT may contain information that is confidential and legally privileged. Please do not read, copy, forward, or store this message unless you are an intended recipient of it. If you have received this message in error, please forward it to the sender and delete it completely from your computer system. Please consider the environment before printing this email.
Re: [uknof] Belfast
On 10 September 2014 03:18, David Farrell d...@davidfarrell.ie wrote: Folks, It was absolutely *fantastic* to be part of the last two days in my adopted home town. I hope those who made it enjoyed Belfast and the rest. Cheers, David. Agreed - big thanks to the UKNOF and ION teams Dan
[uknof] Reading-Durham 40G
Hello, We're in need of some high capacity from our DC in Reading to Durham. Diverse paths are needed, we could pick up either in Slough or Docklands. I've checked through the maps and not many people seem to have fibre up that far north. Any suggestions on who would be worth getting in touch with? Thanks -- Ed Butler
Re: [uknof] Belfast
On 11/09/2014 09:34, Charlie Boisseau char...@fluency.net.uk wrote: Erm.. I hate to break it to you, but Belfast is in Britain. We might not be able to say the same about Scotland soon:-(, but Northern Ireland is still part of Britain Technically I believe we are the United Kingdom of Great Britain and Northern Ireland. (But people do seem to use Britain and United Kingdom somewhat interchangeably)
Re: [uknof] Belfast
On 09/11/2014 04:35 AM, the hatter wrote: On Thu, 11 Sep 2014, Charlie Boisseau wrote: And Belfast was utterly awesome. Anyone that didn't fancy leaving Britain to get over there really did miss out. Erm.. I hate to break it to you, but Belfast is in Britain. I gave the list several minutes for everyone else to get in first, but surprised by the lack of email deluge, I offer: http://upload.wikimedia.org/wikipedia/commons/2/28/British_Isles_Euler_diagram_15.svg Thank you for this, I was fearing a reprise of the 50-message expository threads we used to have on nom-steer (where's Clive :-?) every time this came up, I think you just saved us this.. (but where's Shetland !) Once again I think we demonstrated that the Internet transcends geography, politics and borders :-) It was a pleasure to have a part in making this meeting happen, +1 big Thank You to all our speakers, partners and helpers. Keith
Re: [uknof] Belfast
Isn't Britain just mainland Britain? England, Wales and (for the moment) Scotland. So Britain is a geographical term, but British is a national designation. Northern Ireland (and the other islands) are part of the United Kingdom of Great Britain and Northern Ireland. So Northern Ireland is not in Britain from a geographical point of view, but people who are born there are British. There's an American chap who did a good job of explaining it: https://www.youtube.com/watch?v=rNu8XDBSn10 -Original Message- From: uknof [mailto:uknof-boun...@lists.uknof.org.uk] On Behalf Of Charlie Boisseau Sent: Thursday, September 11, 2014 9:28 AM To: Tom Hill Cc: uknof@lists.uknof.org.uk Subject: Re: [uknof] Belfast And Belfast was utterly awesome. Anyone that didn't fancy leaving Britain to get over there really did miss out. Erm.. I hate to break it to you, but Belfast is in Britain. We might not be able to say the same about Scotland soon :-(, but Northern Ireland is still part of Britain. Charlie Boisseau Fluency Communications Ltd T: +44 (0) 330 121 1000 Twitter: @charlieboisseau www.fluency.net.uk char...@fluency.net.uk On 10 Sep 2014, at 21:32, Tom Hill t...@ninjabadger.net wrote: On 10/09/14 11:10, Will Hargrave wrote: Absolutely! I was pleased to see so many folks from south of the border too, and the interesting Ireland-related content. Yes, this: it was great to have such an interesting integrated meeting of the two isles. The ION conference added another helping of great people, too. And Belfast was utterly awesome. Anyone that didn't fancy leaving Britain to get over there really did miss out. I'd like us to go back as soon as possible, please. :) Thanks for being such a good host as well, Dave! Tom
Re: [uknof] Belfast
On 11 September 2014 09:54, Geoff Bennett gbenn...@infinera.com wrote: Isn't Britain just mainland Britain? England, Wales and (for the moment) Scotland. tongue_in_cheek Are you suggesting that in the event of Scotland gaining independence that they are going to physically move away from mainland Britain? That may create infrastructure challenges which I don't think either campaign has discussed yet. /tongue_in_cheek Dan
Re: [uknof] Belfast
Sorry everyone! I didn’t realise it would cause such a shit-storm. Charlie Boisseau Fluency Communications Ltd T: +44 (0) 330 121 1000 Twitter: @charlieboisseau www.fluency.net.uk char...@fluency.net.uk On 11 Sep 2014, at 10:08, Paul Mansfield paul+uk...@mansfield.co.uk wrote: damn those mapmakers, causing dissent.
Re: [uknof] Belfast
On 11/09/2014 11:30, David Farrell wrote: On 11/09/2014 09:39, Nick Hilliard wrote: ...except for the anachronistic british isles thing. North-West European Archipelago? we should have competing marches to see who has the better name. That's sure to settle the issue. Nick
Re: [uknof] Belfast
On 11/09/2014 10:15, Charlie Boisseau wrote: Sorry everyone! I didn’t realise it would cause such a shit-storm. Heh. It's caused a lot more than that in the past... Thankfully we've moved beyond that for the most part and I hope it was quite apparent to everyone who visited!! :) Cheers, David.
Re: [uknof] Belfast
On 11/09/2014 11:34, Nick Hilliard wrote: we should have competing marches to see who has the better name. That's sure to settle the issue. Sure, will we hold them in Edinburgh? I hear it's the done thing this week... :)
Re: [uknof] CWDM Advice needed
Also beware of the fringes - something that works on your span today might not after a fibre break or other incident. Cheers Neil Sent from my iPhone On 11 Sep 2014, at 10:08, Brandon Butterworth bran...@bogons.net wrote: Well I'd certainly try this first with a stock inventory part before spending unnecessary money on the expensive vendor optic... I'd find the mux spec before puting something live that may only be on the edge of staying live Vendors do give different tolerances for what the actual wavelength transmitted will be and this will fluctuate slightly due to the manufacturing process Yes, that's the wide range I quoted, devices can be anywhere within that (I've measured them), there's no reason for non cwdm be close to 1310 optic sold as cwdm will have been checked against a tighter limit but I'd be shocked if you're buying LR that isn't almost exactly 1310. It may be some manufacturers use the same lasers for both parts but usually the cwdm have a laser designed for stability, which costs more (DFB vs Fabry-Perot) brandon
Re: [uknof] Reading-Durham 40G
Openreach now offer a 40G optical product that may help. Neil Sent from my iPhone On 11 Sep 2014, at 09:40, Ed Butler e...@tn13.com wrote: Hello, We're in need of some high capacity from our DC in Reading to Durham. Diverse paths are needed, we could pick up either in Slough or Docklands. I've checked through the maps and not many people seem to have fibre up that far north. Any suggestions on who would be worth getting in touch with? Thanks -- Ed Butler
Re: [uknof] CWDM Advice needed
Ok cheers guys! Think that has answered my question! I'll stick to the cwdm optics! Would rather pay a little more and not have issues! Regards Joe Waite On 11 Sep 2014, at 12:10, Neil J. McRae n...@domino.org wrote: Also beware of the fringes - something that works on your span today might not after a fibre break or other incident. Cheers Neil Sent from my iPhone On 11 Sep 2014, at 10:08, Brandon Butterworth bran...@bogons.net wrote: Well I'd certainly try this first with a stock inventory part before spending unnecessary money on the expensive vendor optic... I'd find the mux spec before puting something live that may only be on the edge of staying live Vendors do give different tolerances for what the actual wavelength transmitted will be and this will fluctuate slightly due to the manufacturing process Yes, that's the wide range I quoted, devices can be anywhere within that (I've measured them), there's no reason for non cwdm be close to 1310 optic sold as cwdm will have been checked against a tighter limit but I'd be shocked if you're buying LR that isn't almost exactly 1310. It may be some manufacturers use the same lasers for both parts but usually the cwdm have a laser designed for stability, which costs more (DFB vs Fabry-Perot) brandon
Re: [uknof] Belfast
Thanks Andy - I think we’ve established my mistake now! The official word is: Northern Ireland is not in Britain, but the British Isles and the UK. Britain is just the main bit. Scotland - too early to tell what it might affect. We will need our own regulatory body (like Ofcom) and no doubt have to come to some arrangement to ‘share’ Openreach as a regulated incumbent. God knows what the ramifications are - I’m not looking forward to having to deal with it. Hopefully we won’t have to. C Charlie Boisseau Fluency Communications Ltd T: +44 (0) 330 121 1000 Twitter: @charlieboisseau www.fluency.net.uk char...@fluency.net.uk On 11 Sep 2014, at 13:10, Andy Hunter andy.hun...@itps.co.uk wrote: Erm... I hate to break it to you but Belfast is in Northern Ireland, which last time I checked was not in Great Britain. It is however in the United Kingdom of Great Britain and Northern Ireland.. As for Scotland not being part of the UK has anybody any thoughts about whether this will affect connectivity and Communications? Cheers Andy -Original Message- From: uknof [mailto:uknof-boun...@lists.uknof.org.uk] On Behalf Of Charlie Boisseau Sent: 11 September 2014 09:28 To: Tom Hill Cc: uknof@lists.uknof.org.uk Subject: Re: [uknof] Belfast And Belfast was utterly awesome. Anyone that didn't fancy leaving Britain to get over there really did miss out. Erm.. I hate to break it to you, but Belfast is in Britain. We might not be able to say the same about Scotland soon :-(, but Northern Ireland is still part of Britain. Charlie Boisseau Fluency Communications Ltd T: +44 (0) 330 121 1000 Twitter: @charlieboisseau www.fluency.net.uk char...@fluency.net.uk On 10 Sep 2014, at 21:32, Tom Hill t...@ninjabadger.net wrote: On 10/09/14 11:10, Will Hargrave wrote: Absolutely! I was pleased to see so many folks from south of the border too, and the interesting Ireland-related content. Yes, this: it was great to have such an interesting integrated meeting of the two isles. The ION conference added another helping of great people, too. And Belfast was utterly awesome. Anyone that didn't fancy leaving Britain to get over there really did miss out. I'd like us to go back as soon as possible, please. :) Thanks for being such a good host as well, Dave! Tom [http://www.it-ps.com/wp-content/uploads/2013/12/itps-logo.png] Helping Your ICT Budget Deliver to its Maximum Potential Andy Hunter Professional Services Director IT Professional Services Axwell House Waterside Drive Metrocentre East Business Park Gateshead Tyne Wear NE11 9HU T. 0191 442 8300 F. 0191 442 8301 andy.hun...@itps.co.ukmailto:andy.hun...@itps.co.uk Check out our new website at www.it-ps.com http://www.it-ps.com/ and see how we can help your IT budget deliver more for less. [http://itpswebhost01.it-ps.com/customer_images/itps/twitter]http://twitter.com/#!/itpsltd [http://itpswebhost01.it-ps.com/customer_images/itps/facebook] http://www.facebook.com/pages/ITPS/180607505381380 [http://itpswebhost01.it-ps.com/customer_images/itps/linkedin] http://uk.linkedin.com/in/itpsltd Company No. 3930001tel:3930001 registered in England VAT No. 734 1935 33tel:734%201935%2033
