DIFFERENCES BETWEEN DID & PSTN
DIFFERENCES BETWEEN DID & PSTN
In telecommunications terminology, a DID (Direct Inward Dialling) number and a PSTN (Public Switched Telephone Network) number stand for different services.
Direct Inward Dialling (DID) Number:
Definition: In a private branch exchange (PBX) system, a DID number is a virtual phone number that allows incoming calls to be routed directly to designated extensions.
Use: Companies use DID numbers to streamline communication by allowing outside callers immediate access to certain extensions, eliminating the need for a receptionist.
Flexibility: By assigning dedicated lines to certain people or departments, DID numbers provide flexibility and enable effective administration of incoming calls.
Public Switched Telephone Network (PSTN) Number:
Definition: PSTN describes the classic, circuit-switched telephone network permitting global voice, data, and video interchange.
Use: PSTN numbers are regular landline or cell phone numbers that are given to people or companies and are routed through physical switches and connections.
Technology: PSTN relies on circuit-switching technology, distinct from modern Voice over Internet Protocol (VoIP) technologies.
Key Difference between normal PSTN & DID
Technology: While PSTN numbers are connected to the conventional circuit-switched network, DID numbers are linked to VoIP and digital telephony.
Functionality: DID numbers are excellent at routing calls inside a company, giving users immediate access to designated extensions. General-purpose phone numbers are PSTN numbers.
Infrastructure: While PSTN relies on historical infrastructure that is gradually being replaced by more current technology, DID numbers are more adaptable due to their use of digital systems.
DID numbers are essentially associated with digital telephony, which simplifies internal communication, whereas PSTN numbers are associated with classic telephone networks, which are defined by legacy infrastructure and circuit-switching technology.
Note: Telecommunications technologies and standards may evolve over time, and it's advisable to consult the latest sources or industry experts for the most current information. The article has been written with an intent to educate the enterprise for better understanding of these type of services.
