PBX System

  . Stands for Private Branch Exchange.
  . Used as private telephone network within a company or organization.
  . Allows organization to manage incoming and outgoing calls and also communication within the organization.
  . Made of software and hardware devices like telephone adapter, hubs, switches, routers etc.

Who uses?

  . Telephone operators
  . Corporations
  . Government institutions
  . Distrubutors
  . Equipment manufacturers

How it works?

  . It splits one single phone line into several internal lines which are identified through 3 or 4 digit number extensions.
  . It switches calls to appropriate extensions.
  . It maintains a server which has information of clients registered by SIP (Session Initiation Protocol).
  . Whole communication is done with VoIP (Voice over Internet Protocol) which uses internet for data transmission instead of telephony system.
  . Automatically direct users to most appropriate line through saved voice menus like... Press 1 for Data Services, Press 2 for Call Rates.

Types of PBX Systems:

1. Digital PBX System:

   . It delivers good sound quality.
   . It can accommodate normal phones and IP phones.
   . Offers call transfers, voicemail, call-forwarding etc. 

2. IP Based PBX System:

   . All the clients registers with SIP( Session Initiation Protocol) in PBX server.
   . When user places a call, it checks whether it is internal or external call.
   . If internal, it uses SIP to route call.
   . If external, routes via VoIP Gateway which inturn connects to PSTN.
   . Offers voicemail to email, video calling etc.
   . Delivers call with greater stability and better sound quality.

3. Virtual PBX System:

   . Also called Cloud PBX or Hosted PBX.
   . Provides all calling services on Cloud.
   . Telecom service provider hosts virtual phone system, PBX maintanence.
   . It offers Multi-office networking, budget friendly pricing.