Reivertom

don’tworry… time will take care of it.. price will go up…. one day 🙂

p.s. 500 set:    common   “hard to kill”  black rotary  dial desk phone or kitchen   🙂

to answer that one is easy… if I may

Digital technology that replaced central office relay switching works the  same way   when capturing  rotary dial  pulses generating  make and break   loop current at  45-65 % percent break.   Later  came  touch tones  on the  basic  service… to charge you more  money 🙂 while  saving  all the maintenance $$$   on the clink-clank relays  technology.

Digital  ” line cards” simply capture the  on-off current  pulses on the phone loop   as a   stored digit     and  converts it  to ” signalling/routing)  information”  to be processed further down the system .  The accumulated dialed numbers ( 1 to 0) interspaced by  ” inter  digit timing”      are  accumulated  to form  a destination  #  according to the  Number Plan Area  +Exchange NXX & xxxx  format.

Computers then  first  define  the call  as local or LD  & establish  a  point to point connection and  pass on network routing  info to both  calling  and called parties  ( dial tone, ring tones   busy tones, ” no such number  tones, netwrok messages,  called ID)    etc..)

Upon getting a signalling reply  (off-hook loop current ) from the destination the voice component  is established between parties.  All this is done  in an instant

sound quality wise… old networks carried  300-4000 hz  bandwith for human ears… today everthing  is  sampled, encoded,  reassembled  using complex algorithms to  recreate sounds … no wonder  ” bits” of it are lost on the way 🙂

Concept wise … nothing new under the sun.   remember when phone  serbvice was $18/month  🙂

One problem…with rotary… not so good to fetch /control voice mail unles you link it to a  separate  touch tone pad  🙂

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