North American Network Operators Group Date Prev | Date Next | Date Index | Thread Index | Author Index | Historical Re: Advice/Experience with small sized DDWM gear
On Fri, 20 Jun 2003 14:56:41 -0400 "Deepak Jain" wrote: > > Nanogers, > > > > We are looking for advice/experience from folks who has used small 6-8 > > Wavelength DDWM. > > > > Also what are the pros and cons of CDWM and DDWM? > > > > Application; 5 Mile Dark Fiber between two carrier neutral hotels in SF. > > > > All help is appreciated and results will be shared if requested. > > > > Arman, > > I think the biggest difference between small DWDM and CWDM is how much > growth room you need. > > If you need 8 wavelengths (possibly 16 is still called CWDM but I doubt > it) > you can stay on the CWDM side. The lasers and the gear is generally cheaper. > > With DWDM gear everything seems to be more expensive, but you get a lot > more control as the electronics governing the chassis' tend to be much more > advanced. On a short run like that, many advanced features like all-optical > amplification and such are not necessary. I am not aware of any all-optical > CWDM amplifiers yet. (for example). > > If you are planning more than just 1 DF run, you could buy the less > expensive solution and just swap it out when you need something more and use > the CWDM solution somewhere else. > > If you have decent/modern fiber, you should be able to comfortable sign > al > 8 waves x 1G or 8 x 2.5G (full duplex). Some DWDM gear will let you double > that on just 8 colors by going full duplex on each fiber (each thread). > > So its a question of how much BW you need and how much you want to pay > for right now. > > (If I am wrong, someone please correct me). > > Hope this helps, let me know what you decide. I would be interested in recommendations for specific hardware. We are looking at longer runs and the units must be NEBS compliant as the nodes are in telco COs. thanks, fletcher
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