PSTN


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PSTN

PSTN

PSTN

(Public Switched Telephone Network) The worldwide voice telephone network. Also called the "plain old telephone system" (POTS) and originally analog only, the heart of most telephone networks today is digital. However, the lines from the home and office to the digital loop carrier (DLC) junction box in the neighborhood typically remain analog. At that point, analog signals are converted to digital.

IP Backbones
Increasingly, the digital infrastructure of the PSTN is migrating from the TDM-based circuit-switched architecture to IP-based packet switching (see IP telephony). See digital loop carrier and AIN.


Switched, But Not Too Public
In 1886, this 50-line magneto switchboard, made by Bell Telephone of Canada, was used to switch voice calls in small localities. These instruments were the beginning of the worldwide PSTN. (Image courtesy of Nortel Networks.)
References in periodicals archive ?
Alcatel-Lucent's PSTN Smart Transform provides consulting and design services that will enable the development of comprehensive PSTN transformation plans for operators to protect the business value of high-margin voice services while optimizing costs, removing network complexity and risk, and growing revenue.
technical underpinnings of the PSTN, seeking to move their own customers
Situation 2: The facts are the same as in Situation 1, except that A does not have multiple business locations, and Z uses a dedicated circuit, instead of a SONET ring, to transmit A's telecommunications to the PSTN and others' telecommunications from the PSTN.
The issue is that the PSTN has always been, and continues to be, a state-based network: switches must keep track of the state of a call at all times.
31, 2006, Keynote found that overall reliability among the various competing VoIP providers had improved across the board and that the leading digital cable providers had in fact outperformed PSTN in overall reliability.
Our test results confirm that VoIP services available today can equal or exceed the quality of traditional PSTN offerings.
Traditional telephone numbers are available through PSTN connectivity and ENUM, while CommuniGate Pro 5.
CTI will also be able to offer users their own Virtual Private Network (VPN) for delivering calls on and off of the public switched telephone network (PSTN), such as 'landing' calls from one nation's PSTN to another nation's PSTN, as well as utilizing a unique four (4) digit dialing plan worldwide.
The combination of the Quintum SIP Tenor VoIP MultiPath switches and gateways - which provide the required network elements that enable connectivity for external calls to the PSTN - and the TeleVantage phone system gives customers added flexibility and cost saving benefits by making it possible for them to run TeleVantage applications from their corporate infrastructure to branch offices without deploying additional telephony equipment.
Attracted by the scalability, quality and unique converged approach offered by Broadwing's VoIP solutions, Aptela is replacing current PSTN connectivity partners with Broadwing
USRobotics' USB Telephone Adapter lets users make both Skype Internet Telephony calls and traditional PSTN calls via their existing PSTN telephone handset.
CAMBRIDGE, England -- The financial impact of naked digital subscriber line (NDSL) - DSL broadband without a compulsory PSTN voice service subscription - on incumbent telcos is likely to be small, according to a new report, Naked DSL: challenges and opportunities published by Analysys, the global advisers on telecoms, IT and media (http://research.