It requires a listening/recording/transmission device in or on the outside of the room.
To further clarify (or make muddier), it’s not just one ‘thing’ that the Obama/Hillary/DNC/MSM did.
I believe they bugged his offices, they bugged the White House, they tried to hack his emails, they tried to hack the RNC, they monitored all phone calls of all his staff, they monitored use of all cell phones of his staff, and they had the MSM and private investigators, and the FBI, CIA, DHS shove their fingers up the *sses of Trump and his staff.
In otherwords, it is much, much worse than is even being claimed or admitted to.
Do you have a clue or what .. the Secret Service has tools not many people have. And, they can electronically monitor a phone and tell if there is electronic surveillance on the phone. And, as was noted in the story - Rudy G has a ready-made company which does surveillance, security, etc. Since his friend is named “Donald”, I suspect he was called in to find out who was tapping Donald’s phone.
I’d trust the Secret Service long before I’d trust the FBI or CIA.
They could just access smart TV’s to get pictures and hear sound (when the TV isn’t on.
True, all wire taps are done in the Central Office. Nothing is done at the residence anymore. Hasn’t been done this way for years. And at&t, Verizon, CenturyLink and Frontier must comply with the Federal government.