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LiberalArkie

(19,865 posts)
4. I am puzzled about this. SS7 has always been a different path than the voice calls.
Thu Dec 18, 2014, 09:55 PM
Dec 2014

From the cell site it was the slow speed circuits. In fact because the small packets of handoff data used so little bandwidth, the cellular companies started selling off the excess bandwidth on the circuits from the cellular tower to the cellular switch (MTSO). The excess packets that they sold to customers were called SMS or text messages. I can understand how tapping into the SS7 network might get text messages, but I can't see voice.

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