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#PSTN #public switched telephone network #landline #global network #telecommunications

⬛⬛⬛⬛⬛⬛⬛⬛⬛ ⬛⬜⬜⬜⬜⬜⬜⬜⬛ ⬛⬛⬛⬛⬜⬜⬜⬜⬛ ⬛⬜⬜⬛⬜⬜⬜⬜⬛ ⬛⬜⬜⬛⬜⬜⬜⬜⬛ ⬛⬛⬜⬛⬜⬜⬜⬜⬛ ⬛⬛⬛⬛⬛⬛⬛⬛⬛

#internet connection #public switched telephone network #chromecast