DWDM Optics cheaper than CWDM Optics?
Hello, fs.com offers DWDM optics that are cheaper than CWDM optics: CWDM 80km 10G for 600$ http://www.fs.com/c/cisco-cwdm-sfp-plus-2425?70-80km DWDM 80km 10G for 420$ http://www.fs.com/c/cisco-dwdm-sfp-plus-2485?70-80km This is significant. Is this for real? Has anybody bought their DWDM optics? Going with DWDM and passive Mux/Demux seems to be cheaper nowadays than going with CWDM. Regards Karl
Karl, I've bought at least 20k in optics from them in the last 2 years, from QSFP DAC, QSFP to 10g breakouts and everything in between and the only thing to fail was 1 QSFP breakout cable. A partner of ours uses their DWDM optics and passive MUXs while I've used their CWDM with no issues. Luke Guillory Network Operations Manager Tel: 985.536.1212 Fax: 985.536.0300 Email: lguillory@reservetele.com Reserve Telecommunications 100 RTC Dr Reserve, LA 70084 _________________________________________________________________________________________________ Disclaimer: The information transmitted, including attachments, is intended only for the person(s) or entity to which it is addressed and may contain confidential and/or privileged material which should not disseminate, distribute or be copied. Please notify Luke Guillory immediately by e-mail if you have received this e-mail by mistake and delete this e-mail from your system. E-mail transmission cannot be guaranteed to be secure or error-free as information could be intercepted, corrupted, lost, destroyed, arrive late or incomplete, or contain viruses. Luke Guillory therefore does not accept liability for any errors or omissions in the contents of this message, which arise as a result of e-mail transmission. . -----Original Message----- From: NANOG [mailto:nanog-bounces@nanog.org] On Behalf Of Karl Gerhard Sent: Tuesday, January 31, 2017 9:17 AM To: nanog@nanog.org Subject: DWDM Optics cheaper than CWDM Optics? Hello, fs.com offers DWDM optics that are cheaper than CWDM optics: CWDM 80km 10G for 600$ http://www.fs.com/c/cisco-cwdm-sfp-plus-2425?70-80km DWDM 80km 10G for 420$ http://www.fs.com/c/cisco-dwdm-sfp-plus-2485?70-80km This is significant. Is this for real? Has anybody bought their DWDM optics? Going with DWDM and passive Mux/Demux seems to be cheaper nowadays than going with CWDM. Regards Karl
I have been under the impression for years now that the age of the fiber may play a roll in which you prefer due to channel spacing needed to cram in more frequencies. Never really came across a real world situation where one didn't work as well as the other. There is probably more things to consider than the fiber's age. Thank You Bob Evans CTO
Hello,
fs.com offers DWDM optics that are cheaper than CWDM optics: CWDM 80km 10G for 600$ http://www.fs.com/c/cisco-cwdm-sfp-plus-2425?70-80km DWDM 80km 10G for 420$ http://www.fs.com/c/cisco-dwdm-sfp-plus-2485?70-80km
This is significant. Is this for real? Has anybody bought their DWDM optics?
Going with DWDM and passive Mux/Demux seems to be cheaper nowadays than going with CWDM.
Regards Karl
On 01/31/2017 10:17 AM, Karl Gerhard wrote:
Hello,
fs.com offers DWDM optics that are cheaper than CWDM optics: CWDM 80km 10G for 600$ http://www.fs.com/c/cisco-cwdm-sfp-plus-2425?70-80km DWDM 80km 10G for 420$ http://www.fs.com/c/cisco-dwdm-sfp-plus-2485?70-80km
This is significant. Is this for real? Has anybody bought their DWDM optics?
Going with DWDM and passive Mux/Demux seems to be cheaper nowadays than going with CWDM.
I came to the same conclusion a couple years ago. At the time, CWDM was about the same price as DWDM or maybe still just a hair cheaper, but the DWDM system is a) so much more capable, and b) typically has better tools/monitoring, etc. (if you're using muxponders, etc.) that it made sense to just go DWDM. Given advances in optics, I'm not surprised that DWDM is now cheaper than CWDM outright. Of course, the same may not be true if you're buying a fully engineered system from a major vendor. CWDM can be a little easier to engineer...sometimes. -- Brandon Martin
Since I am in the middle of doing something similar, I will share my observations. CWDM Advantage:- Passive CWDM Muxes are less expensive than the DWDM counterparts. Short Range optics (CWDM) are favorable priced Long Range optics are not so favorably priced. ( I guess that is due to production volume). Deploying a CWDM passive mux solution, can allow you to stack a DWDM mux on the 1530-1560 CWDM channel. (one has to pay attention to the loss/attenuation calcs). If you need to Regen the light.. then there are a lot of solutions (cost effective) available for the DWDM channel range (have not been able to find any kind of amps for CWDM.. if anyone has suggestions, I would be open to them). Amount of channels available on CDWM are limited in qty when compared to what is possible with DWDM. When using long rage optics, pay attention to the equipment you are plugging them in.. not all optical ports are capable of supplying the amount of power and heat dissipation required. As to the original question about the quality of optics from FS.COM.. We have no complaints, when there were mistakes made, they stood behind their products and corrected them. I would recommend that you deal with one of their many Sales Rep's vs just placing order online. Their products match the specs they list.. They are also able to do some custom stuff which is not listed on their web site.. (i.e. provide muxes which have a lower insertion loss in certain configurations). Regards Faisal Imtiaz Snappy Internet & Telecom 7266 SW 48 Street Miami, FL 33155 Tel: 305 663 5518 x 232 Help-desk: (305)663-5518 Option 2 or Email: Support@Snappytelecom.net ----- Original Message -----
From: "Karl Gerhard" <karl_gerh@gmx.at> To: "nanog list" <nanog@nanog.org> Sent: Tuesday, January 31, 2017 10:17:14 AM Subject: DWDM Optics cheaper than CWDM Optics?
Hello,
fs.com offers DWDM optics that are cheaper than CWDM optics: CWDM 80km 10G for 600$ http://www.fs.com/c/cisco-cwdm-sfp-plus-2425?70-80km DWDM 80km 10G for 420$ http://www.fs.com/c/cisco-dwdm-sfp-plus-2485?70-80km
This is significant. Is this for real? Has anybody bought their DWDM optics?
Going with DWDM and passive Mux/Demux seems to be cheaper nowadays than going with CWDM.
Regards Karl
Just so you know, FS.com now stocks many of the common optics in Seattle Washington for next day delivery. So they now are stocking more and more items in the USA. When we order an item from China on Monday USA time, we get it it Thursday morning USA time if its in stock in China! On Tue, Jan 31, 2017 at 9:17 AM, Karl Gerhard <karl_gerh@gmx.at> wrote:
Hello,
fs.com offers DWDM optics that are cheaper than CWDM optics: CWDM 80km 10G for 600$ http://www.fs.com/c/cisco-cwdm -sfp-plus-2425?70-80km DWDM 80km 10G for 420$ http://www.fs.com/c/cisco-dwdm -sfp-plus-2485?70-80km
This is significant. Is this for real? Has anybody bought their DWDM optics?
Going with DWDM and passive Mux/Demux seems to be cheaper nowadays than going with CWDM.
Regards Karl
I've bought their DWDM 80km 10gig and they are working beautifully on a couple amplified circuits with both Cisco and Juniper routers. I've also bought gray optics and DACs. The only issue I've noted with some QSFP+ DACs is some kind of programming issue where the serial number is mis-read by some models of our Juniper switches. Another oddity is that each end of some of our DACs have a separate serial number...we just record both in our inventory tracking system. On Tue, Jan 31, 2017 at 04:17:14PM +0100, Karl Gerhard wrote:
Hello,
fs.com offers DWDM optics that are cheaper than CWDM optics: CWDM 80km 10G for 600$ http://www.fs.com/c/cisco-cwdm-sfp-plus-2425?70-80km DWDM 80km 10G for 420$ http://www.fs.com/c/cisco-dwdm-sfp-plus-2485?70-80km
This is significant. Is this for real? Has anybody bought their DWDM optics?
Going with DWDM and passive Mux/Demux seems to be cheaper nowadays than going with CWDM.
Regards Karl
participants (7)
-
Bob Evans -
Brandon Martin -
Chuck Anderson -
Colton Conor -
Faisal Imtiaz -
Karl Gerhard -
Luke Guillory