Information Technology Reference
In-Depth Information
is.the.closest.or.has.the.strongest.signal.so.I.can.most.eficiently.
communicate.with.the.cellular.channels?”.The.towers.receive.
those.signals.and.from.them.can.tell.which.phone.is.which.and.
what. cell. phone. number. corresponds. to. that. phone.. That's.
how. the. cellular. system. makes. connections. between. your.
phone.and.the.phone.with.which.you.are.communicating.
When.you.do.the.lashing.thumb.trick.and.type.out.a.text.
message. to. your. friend,. those. key. taps. on. your. phone. are.
translated.into.electronic.signals..Inside.your.phone.they.are.
channeled.to.the.screen.so.you.can.see.what.you.are.typing,.
and.they.are.stored.in.the.phone's.memory.
When. we. spoke. earlier. about. memory. we. spoke. of. it.
as.volatile,.meaning.that.it.would.lose.data.once.the.device.
was. shut. down. or. the. application. turned. off.. With. phones,.
however,.their.memory.might.be.thought.of.as.semi-volatile.
instead.. Because. of. their. size,. a. phone's. memory. will. be.
somewhat.limited.(although.thanks.to.Moore's.law.that.limit.
keeps.growing),.so.data.stored.in.a.phone's.memory.will.gen-
erally. be. kept. until. it. needs. more. room.. Then. one. of. two.
things. will. occur.. It. might. automatically. be. purged. to. make.
room.for.more.data.in.what.is.called.FIFO.(irst.in-irst.out).by.
computer.engineers..This.indicates.that.the.oldest.stored.data.
will.be.purged.irst.to.make.room.for.more..Or.in.some.cases,.
your.phone.might.tell.you.it.is.out.of.memory.and.prompt.you.
to.delete.some.data.such.as.photos.or.movies.that.are.taking.
up.room.
In.any.case,.the.message.you.are.typing.will.be.stored.in.
the.phone's.memory..Most.often.this.is.the.type.of.data.that.
the.phone.will.automatically.purge.as.it.needs.more.space,.so.
you.will.not.have.control.of.how.many.messages.are.stored.
Finally,.that.data.will.be.sent.in.a.signal.to.the.cell.tower.
that. is. closest. or. has. the. strongest. signal.. The. signal. will.
include.information.about.who.sent.the.message,.the.type.of.
message.body.(is.it.text.or.pictures,.etc.),.and.the.destination.
of.the.message,.as.well.as.some.error.checking.information.
to.ensure.it.arrives.at.its.destination.the.same.as.when.it.left.
your. phone.. The. cellular. network. will. interpret. that. signal.
