1. IP/WDM Development Prepared For: GLOBCOM’99 Telcordia Contact: Richard Cardwell 732-758-2993 December 6,1999 An SAIC Company

2. Doc Name – 2 Long Distance IP/WDM  Cost of fiber and wavelengths is very high  Majority of network cost is in fiber plant  Electronics is used for multiplexing signals to minimize fiber requirements  Doubtful a network element will have 10 Gb/s demand to a foreign network element  SONET multiplexer will still be used to raise data rate even with IP/WDM  IP/WDM should employ SONET for layer 2 to remain compatible with SONET and enable multiplexing to higher rates  Some equipment may directly interface with WDM, depending on cost

3. Doc Name – 3 Long Distance IP/WDM Networks OC3 SONET MUX OC12 WDM OC48 WDM SONET MUX 10 Gb/s line rate

4. Doc Name – 4 Metropolitan IP/WDM  Distance are short - on the order of 10-20 km.  Rates between switches are on the order of DS3 or OC3  SONET commonly used for electrical multiplexing  WDM direct interface is economic at OC12 levels today, OC3 in the future  Many inexpensive wavelengths will relatively low data rates  WDM provides wavelength protection  IP/WDM will still use SONET to remain compatible with existing equipment

5. Doc Name – 5 Metropolitan IP/WDM OC3 SONET MUX DS3 2.4 Gb/s line rate DS3 OC3 WDM MUX 40 Wavelengths

6. Doc Name – 6 IP/WDM  Use simplified SONET as a framing protocol to remain compatible with existing equipment  WDM protection capability is important to protect against fiber failures