What is EPABX? EPABX Functions| Use of EPABX | DID What is DID
EPABX stands for Electronic Private Automatic Branch Exchange. An EPABX has three main components (1) the analog system and analog to digital converter which is basically the various line cards (2) the cross connection matrix which connects one call to another and (3) the control of the whole EPABX. Its a mini exchange in which one can input 2/3/4/more telephone lines and take out many outputs.
The first part deals with the analog system i.e. the voice coming on two wires and the associated signaling. It converts the signaling as well the voice into digital and handovers to the matrix. The matrix checks for which port (the no. you dial is just a port of it) is the call meant for and digitally connects the respective port to the calling port. The call is established and held as long as you keep the receiver off hook. The third part maintains the normal functioning of the EPABX including power supply, configuration, troubleshooting and generation of various reports.
DID: Short for direct inward dialing , local phone company that allows an organization to have numerous individual phone numbers for each person or workstation in its PBX system that run off a small block of dedicated telephone numbers. DID allows the multiple lines to be connected to the PBX all at once without requiring each to have a physical line connecting to the PBX.
For example, if an organization has 25 employees and each employee has a separate telephone number, or extension, within its physical location, the organization can rent 10 physical trunk lines from the telephone company that will allow 10 phone calls to take place simultaneously. Others would have to wait for an available line and anyone dialing into the system while all 10 lines are in use would get either a busy signal or be channeled into a voice mail system. A DID system does not require a PBX operator and can be used for fax and voice transmissions.
The first part deals with the analog system i.e. the voice coming on two wires and the associated signaling. It converts the signaling as well the voice into digital and handovers to the matrix. The matrix checks for which port (the no. you dial is just a port of it) is the call meant for and digitally connects the respective port to the calling port. The call is established and held as long as you keep the receiver off hook. The third part maintains the normal functioning of the EPABX including power supply, configuration, troubleshooting and generation of various reports.
DID: Short for direct inward dialing , local phone company that allows an organization to have numerous individual phone numbers for each person or workstation in its PBX system that run off a small block of dedicated telephone numbers. DID allows the multiple lines to be connected to the PBX all at once without requiring each to have a physical line connecting to the PBX.
For example, if an organization has 25 employees and each employee has a separate telephone number, or extension, within its physical location, the organization can rent 10 physical trunk lines from the telephone company that will allow 10 phone calls to take place simultaneously. Others would have to wait for an available line and anyone dialing into the system while all 10 lines are in use would get either a busy signal or be channeled into a voice mail system. A DID system does not require a PBX operator and can be used for fax and voice transmissions.
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