Automatic user branch exchange-a new solution for intra-school communication

Automatic private branch exchange; [private automatic exchange extension] A private telephone exchange that automatically connects internal “branch” lines to the external circuits of a telephone system. A private telephone exchange that automatically connects internal subscriber lines to the external lines of the telephone system . Acronym for Private Automatic Branch Exchange.

There are four main ways for user switches to access the network:

1. Fully automatic direct dial relay mode (DOD + DID)

2. Semi-automatic direct dialing relay mode (DOD + BID)

3. Hybrid automatic direct dialing relay mode (DOD + DID / BID)

4. Manual relay

DOD is direct dial out

DID is direct dial-in

The PBX (small user program-controlled switchboard) is one of the telephone communication management methods commonly used in modern offices. It enables the telephone manager to manage the incoming and outgoing calls in a group. PBX equipment is generally composed of outside lines and extensions. Outside line refers to the total number of outside lines connected to the PBX. The extension is the number of calls you have arranged for your employees.

The main functions are: change of extension number (change your original extension number), group outside lines (someone in the group can use the outside line in the group, and the outside line can directly enter the group extension), long distance restrictions During normal office hours, some employees will use company phones to make long distance calls. If the call charge is relatively high, this function can be used to limit the long-distance outgoing calls of the extension), computer operator (if you do not have a receptionist to answer the call, the computer operator can transfer you) Fee system (mainly count the cost of calls made by extensions, which can be counted according to a certain period of time)

Types of commonly used outside lines:

1. Ordinary outside line: ordinary line of telephone office.

2. ISDN line: One line (ISDN) line.

3. Ordinary trunk line: same as ordinary office line, but it can be automatically selected.

4. E & M dedicated line: A dedicated line connecting telephone systems in various places.

Access common extension types:

1. Ordinary extension: ordinary telephone extension can be installed.

2. Dedicated extension: The dedicated extension in each brand telephone system, the main function is to program and realize special functions.