Telecommunications Services of Trinidad and Tobago
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PABX / PBX

Private Automatic Branch Exchange or Private Branch Exchange are large telephone systems that are used by businesses. These systems are able to facilitate scores of telephone lines and hundreds of extensions. Some features that are offered by these systems are as follows:
  1. Transferring of calls
  2. Paging
  3. Intercom services
  4. Voice Mail Services
  5. Music on hold