Connecting into PSTN
nUsers
can connect into PSTN by
nFixed-line
phone (analog, voice)
nCordless phone (analog with A/D converter in the terminal, also
DECT based access)
nFax
(digital data with a build-in modem providing an analog
signal)
nComputer (digital via modem, ISDN or ADSL techniques)
nPay phone
(analog or digital)
nPBX (PCM link to the local exchange, A/D conversion in the business
network)
DECT: Digital Enhanced Cordless
Telecommunications
ADSL: Asynchronous Digital Subscriber
Line
PBX: Private Brach Exchange