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Independent of bit-rates and formats: WDM can support multiple protocols. Each signal can be carried at different |
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bit rates. For instance, one signal can be carried a OC-12 while another at OC-48. Similarly, signals can be carried over different formats like SONET, ATM etc. |
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2. |
Channel capacity can be increased incrementally by adding more wavelengths. Thus a 10 wavelength OC-12 with |
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a bit rate of 24 Mbps can be upgraded to a 40 wavelength one with a bandwidth of 99.52 Mbps. |
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