GiraffeDog Technical Services Limited

A Private Branch eXchange (also called PBX, Private Business eXchange or PABX for Private Automatic Branch eXchange) is a telephone exchange that is owned by a private business, as opposed to one owned by a common carrier or by a telephone company. Historically a PBX was a company's manual switchboard, and was known as a PMBX (Private Manual Branch eXchange).
These were gradually replaced by automated electromechanical and then electronic switching systems, called PABXs (Private Automatic Branch eXchange). As PMBXs are almost unheard of these days, the terms PABX and PBX have become synonymous. When PABXs were built using solid state and digital components the term EPABX came into use but PBX is still more widely recognized. The PBX term was dominant for so long, that it is now being applied very liberally to systems providing complex services regarding telephony, even if they are not Private, Branches or eXchanging anything.
PBXs were distinguished from smaller "key systems" by the fact that external lines are not normally indicated or selectable at an individual extension. From a user's point of view calls on a key system are made by selecting a specific outgoing line and dialing the external number; calls on a PBX are made by dialing the escape code (usually 9, 0 in some systems) followed by the external number; an outgoing trunk line is automatically selected upon which to complete the call. This practice is becoming obsolete as number analysis systems have been changing with modern technology - you can use internal numbers or external numbers without any need for escape codes.

What gdPBX can do for you... 

• A single point of contact through the telephone network
• To be able to transfer calls internally to each office and to remote offices
• Any office to be able to answer the incoming calls
• Multiple incoming calls
• Interface with VOIP, (Voice Over IP), and PSTN, (Public Service Telephone Network) Trunks
• Auto Attendant
• Call accounting
• Call waiting
• Voicemail for each extension
• Direct Inward Dialing
• Music on Hold
• Dialing Rules based on extension/number called

VOIP Conclusion 

gdPBX supports a wide range of TDM protocols for the handling and transmission of voice over traditional telephony interfaces. gdPBX supports US and European standard signalling types used in standard business phone systems, allowing it to bridge between next generation voice-data integrated networks and existing infrastructure. gdPBX not only supports traditional phone equipment, it enhances them with additional capabilities.

gdPBX merges voice and data traffic seamlessly across disparate networks. While using Packet Voice, it is possible to send data such as URL information and images in-line with voice traffic, allowing advanced integration of information.

gdPBX provides a central switching core, hardware interfaces, file format handling, and codecs. It allows for transparent switching between all supported interfaces, allowing it to tie together a diverse mixture of telephony systems into a single switching network.