Cell Phone Transmitting and/or Receiving

[randau]

When being put on hold or listening to a recording (receiving), is
there the same amount of battery drainage as when speaking
(transmitting)? Do cell phones both transmit and receive
simultaneously all the time while on a call? Or, do cell phones have
voice activated transmission, i.e., transmitting only when speaking?

 

[Jon Elson]

When being put on hold or listening to a recording (receiving), is
there the same amount of battery drainage as when speaking
(transmitting)? Do cell phones both transmit and receive
simultaneously all the time while on a call?

Analog cell phones do exactly that. The digital ones do not.


Or, do cell phones have

voice activated transmission, i.e., transmitting only when speaking?

The digital ones effectively do that, but it is by digital compression
and then digital transmission of the encoded voice packet.

Jon

 

[Paul Burridge]

Analog cell phones do exactly that. The digital ones do not.


Or, do cell phones have


The digital ones effectively do that, but it is by digital compression
and then digital transmission of the encoded voice packet.

That must save an awful lot of battery power. And there was me
thinking the on-going improvement in frequency of recharging was due
to advancing battery technology!

 

[randau]

Thanks Jon, for the precise answer to my questions.

-randau