Siemens Pabx-Installation & Maintenance. Private Automatic Branch Exchange
The term “private automatic branch exchange (PABX)” is often used as a synonym for “telephone system”. Private automatic branch exchanges are switchboards which connect several devices, e.g. telephones or faxes and answering machines with each other and with the public telephone network.
In a nutshell, PBX stands for Private Branch Exchange, and PABX stands for Private Automatic Branch Exchange. … The word ‘Automatic’ gives a hint as to how the two differ from each other. Basically, a PABX is a type of PBX that is simply automated
PABX automates the switching tasks needed to connect calls between extensions. … In a PABX system, each device connected to the exchange has a designated extension number. These devices include desk phones, computer modems, and fax machines. A PABX system is often owned and administered by the company hosting it.
PBX stands for Private Branch Exchange, which is a private telephone network used within a company or organization. The users of the PBX phone system can communicate within their company or organization and the outside world, using different communication channels like Voice over IP, ISDN or analog.
PSTN uses an old technology whereby circuit-switched copper phone lines are used to transmit analogue voice data. … A PSTN phone number is equivalent to one phone line. ISDN or Integrated Services Digital Network provides digital transmission of voice and data services
Siemens Pabx-Installation & Maintenance. Direct Inward Dialing (DID) is a telephone service that allows a phone number to ring through directly to a specific phone at a business instead of going to a menu or a queue and needing to dial an extension. A phone number that is used like this is often called a “DID” (and multiple numbers are called “DIDs”).
Direct Dial In numbers (DDIs) are additional numbers that allow calls to bypass the operator and be directed straight to the required extension. They are normally used with a PBX, providing separate numbers for individual staff. Your PBX is programmed to route incoming calls using DDI numbers to the correct extensions