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Texts are cheap because they 1. contain very little information (nothing personal in that remark) and 2. they are low priority.
Really, Wow I have sent kinda emergency texts before and did not know they could do that. Have even experienced delays as much as 1 day before a text I sent arrived to its destination the next day! I thought lines were down or something! Wow, I did not know that,.. So they are not regulated by the same regulations as the phone itself and regular calls?
When the TAT1 cable was first opened to the USA it carried 30 4KHz speech channels, later to make more money the bandwidth was reduced to 3KHz, then an even more cunning scheme was instituted whereby speech control was introduced so that you only got a circuit if you were actually speaking.I think this was rather a swindle, you only got your monies worth if you sent facsimile pictures.40 years ago when most telephone circuits to the states went by satellite it was a disaster if you were trying to send pictures, those in the know could add an extra two digits to the dial up code to make sure they got a cable (I have now forgoten them )
Wow that is interesting. It all Sounds a bit sinister!