What is PSTN? What is a landline phone? - Insurance Finances

PSTN is an acronym for English (Public Switched Telephone Network) or translated into Vietnamese as Public Switched Telephone Network. To put it simply, it is a wired landline (desktop) telephone network.

Each customer when installing landline or fax. Will be selected or given a phone number to contact. This contact, when connected to the landline network, will have the right to dial and communicate with other numbers in the same system.

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• Local dialing: Contact with other numbers in a region, province (The way to know is through the number you dial. For example, Hanoi's fixed number is 04)


• Intercity dialing: To contact other numbers outside the province. (Out-of-province number)


• International dialing: Is contacting other numbers via international dialing (International Numbering)

How does PSTN work?

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To make it easy to understand. You see the picture below: This is the manual public switch of the last century. The agent is holding the jacks (equivalent to your PSTN Phone Number) and plugging them into the sockets of another network (To call the number you need to call) Nowadays the whole process above is done automatically and security. Because it is based on the ITU (International-Telecommunication Union) standard. It can connect to many different switching systems around the world so that one country can call to another and serve billions of customers without interruption.

Voice quality of PSTN ?

Guaranteed to provide service with up to 99.99% stability to all customers. In the PSTN network structure. Viettel uses a digital network system (Digital lop carrier) using a high-bandwidth cable network. Ensure easy upgrade to the switchboard system, Trunks for companies, stores and large supermarket systems.

Reference: City RESPIRATORY ASSOCIATION. HO CHI MINH

Landline, Desktop, Fax, Switchboard. All based on PSTN

All viettel wired landline and fax packages are free local calls. This point is very beneficial for customers:

• Agents, ticket offices for flights, ships, railways, etc


• Schools, kindergartens, preschools…


• Companies, businesses, branches, offices


• Small and medium business stores


• Families and households (In need of local calls, Elderly people, children)

Do you need to know the latest viettel landline and fax promotion: See at: viettel desk phone

Related content: Interested in structure in English

Articles to read:

• Service of installing landline (desktop) telephones, fax Viettel


• Viettel's landline and mobile phone numbers will be updated to 2021


• What else can a landline phone make as a switchboard number?


• What is PSTN? What is a landline phone?


• Compare wired landline (PSTN) and cordless phones


• Why companies need to install landlines and faxes

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