PC, no.. the DWDM system affords vary large optical pipes, known as lambdas or wavelengths, which support many lower order groups of channels, whose derivatives are set up as voice calls. Not the DWDM channels, themselves.
A single DWDM may support up to as many as, say, 80 wavelengths which are all a part of the same [single] optical fiber's spectrum.
Each wavelength, in turn, can support an optical carrier channel at various levels, say at level 192 (known as an OC-192). What this translates to is an OC192, or the payload carrying equivalent of 192 T3s.
A single T3 contains 28 T1s, and every T1 contains 24 voice channels.
It is at this lowest level, the voice channel, that voice calls are set up and torn down in the circuit-switched mode.
How many voice channels in an OC-192?
192T3s * 28 T1s/T3 * 24 Voice/T1 = 129,024 voice circuits.
How many voice circuits in the 80 wavelength DWDM system which we used as an example?
129,024 * 80 = 10,321,920 voice circuits per 80-wavelength DWDM system.
With a little bit of compression, which is not uncommon these days, the number goes beyond the equivalent carrying capacity of 20 Million voice circuits.
As it happens, I just a little while ago did a similar piece on another board. Although, in a somewhat different context. See:
Message 11702293
If you go there, don't forget to read the uplink posted by Ray D.
HTH, Frank Coluccio |
