NJ Roadmap
New Member
After spending ages looking for information on the internet, I have resorted to this forum - I can't seem to find any info on how an analogue call from a data modem gets routed through an exchange to an ISP (modem?) and most importantly how an ISP is able to handle 100's of calls a minute.
My theory is this (correct me if I'm wrong!):
-Analogue call from modem gets intercepted at local telephone exchange (it's recognized as a data call because of the number being dialled - from a list of ISP telephone numbers possibly?).
-**
-From here it gets transferred via the ATM network to a gateway and then to the ISP's server.
I still haven't been able to answer the question of how and at what stage the analogue to digital conversion takes place (Possibly at the ** location above?)..I remember reading an article online a few weeks ago but cant remember where!
Any info or web links would be appreciated.
p.s. I'm interested in this info because I'm writing a proposal for automatic utility meter reading possibly via a telephone network (modem on the meter dials into the utility's server)
My theory is this (correct me if I'm wrong!):
-Analogue call from modem gets intercepted at local telephone exchange (it's recognized as a data call because of the number being dialled - from a list of ISP telephone numbers possibly?).
-**
-From here it gets transferred via the ATM network to a gateway and then to the ISP's server.
I still haven't been able to answer the question of how and at what stage the analogue to digital conversion takes place (Possibly at the ** location above?)..I remember reading an article online a few weeks ago but cant remember where!
Any info or web links would be appreciated.
p.s. I'm interested in this info because I'm writing a proposal for automatic utility meter reading possibly via a telephone network (modem on the meter dials into the utility's server)