Transmission media Alternative to the Optical Communication
There are various wired and wireless media used for long and short distance communication. Their broad characteristics are summarized in the following.
The first two media have a very limited bandwidth.
Microwave links and Satellite communication has comparable bandwidths as in principle their mode of operation is same but the spatial reach of satellite is far greater.
Before Fiber optic communication became viable, satellite communication was the only choice for long distance communication.