Hi Jeff, Cisco make a passive CWDM/EWDM solution for this.
http://www.cisco.com/en/US/prod/collateral/modules/ps5455/ps6575/product_data_sheet0900aecd8029d01b_ps708_Products_Data_Sheet.html You need to order a CWDM-MUX8A= for each end, plus the CWDM-CHASSIS-2= to rack-mount them. Then, plug your dark fibre into the trunk port of each mux, and use pairs of coloured optics instead of your ER. The muxes carry 8xlambdas: 1470, 1490, 1510, 1530, 1550, 1570, 1590, and 1610. I don't believe Cisco make CWDM 10G optics however, so you may have to get compatible optics. For 8 additional wavelengths, you could also insert an EWDM mux into the path at each end: http://www.cisco.com/en/US/prod/collateral/modules/ps5455/product_data_sheet0900aecd806a1c36.html ie. a EWDM-MUX8= for each end - it fits into the same rack-mount chassis. This allows you to carry 8 more channels, at DWDM spacings: 1538.98, 1539.77 etc. Cisco do make 10G optics at these wavelengths; X2, Xenpak etc. Having both types of mux in the path can add a fair bit of loss though, and there's an optional amplifier unit which can be plugged into the EWDM muxes: EWDM-OA=. Regards, David > -----Original Message----- > From: Jeff Kell [mailto:jeff-k...@utc.edu] > Sent: Thursday, 9 May 2013 1:21 PM > To: nanog@nanog.org > Subject: Entry level WDM gear? > > Apologies if this is a "dumb newbie" question, but this is one area of > networking where I remain a virgin :) > > We have a local loop fiber to a regional fiber hut that has served us well for > several years. It's carrying a 1550nm ER 10G circuit at the moment, but we're > looking at another one, possibly two (or more) in the near future. Getting > another dark pair is "complicated" so we're exploring options to [C|D]WDM > multiple lambdas over the existing fiber. > > Ciena/Cyan/etc are way over our non-existant budget... what is the going > recommendation to throw say 4-8 lambdas over a dark pair without breaking > the bank? :) > > Jeff >
