This is a rental of virtual private branch telephone exchange via the internet. The system was designed to replace the PABX while customers need not to invest their local PBX system. This help the business reduce the procurement and maintenance cost. The service provides the comparable features, that is, the capable of extension numbers, making calls to other destinations, transferring a call, call pick-up, call hold, and the interactive voice response (IVR) or Auto-Attendant. Customer requires only VoIP terminal equipment, for example, IP phone or internet phone adapter that logically connected to CAT cloud PBX system via an IP network or the internet of any internet providers.

Service models for CAT cloud PBX

Model 1 : Call in with a DID number
  • Incoming call from any phone network is simply directed to the office extension through neither an Operator nor automatic voice response, for example, dial 021044764.
Model 2 : Call in via Auto Attendant or IVR

How to use the service

  • Call to other extension numbers:

simply dial the extension number directly

CAT coud PBX

  • Call to other domestic numbers :

dial the domestic numbers including domestic fxed-line phone

numbers and domestic mobile phone numbers, for example, 02,


  • Call to other foreign countries:

dial digits 009 followed by a country code and the subscriber


Service charge

Monthly charge (maintainance charge)
  • Office extensions of 5-10 numbers : 100 Baht/number/month (minimum charge starts at 5 extension numbers)
  • Office extensions of 11-20 numbers : 80 Baht/ number/month
  • Office extensions from and more than 21 numbers : 50 Baht/number/month
  • Add more public fixed-line number : 100 Baht/number/month
Domestic call charge (air time charge)
International call charge (air time charge)

Please select the destination country

  • Minimum rate charge is at 1 minute. The next minutes is charged for every 6 seconds.
  • All rates are exclusive of 7% VAT and one rate is applied for 24 hours a day.
  • Rates depends on the receiving phone service ; fixed line and mobile are different.
  • For more information, please call CAT Contact Center 1322
  • The promotion is available until 31  December 2021
  • The company reserves the right to make changes to the promotion without prior notice

Service Application Contact

Corporate customer call  


Government customer call 


Share our services  :