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3CX is one of the Global Leaders in IP PBX Markets!

Official 3CX Partner ID No. 212567




We're pleased to provide the following IP PBX and IP Telephony related services.


- IP PBX setup service according to your requirement

- SIP Trunk setup service (Termination/Origination)

- Global Phone Number Provision (Landline/Mobile)

- Managed service, or Turnkey setup service


                              > IP PBX Telephony System Explained <



What are SIP Trunks?

A SIP trunk is the modern day equivalent of a T1 trunk. Where in the past you would buy a T1 trunk from a Telco provider and connect it to your legacy PBX, today you can buy a SIP trunk from an ITSP (Internet Telephony Service Provider) and connect it to your VoIP/IP PBX. SIP trunks use the SIP standard. The name ‘trunk’ comes from the telecom world and it means, more or less, a group of phone lines.

Using this standard protocol, telecom service (VoIP) providers connect one or more channels to the customer’s PBX. Phone numbers and DIDs are linked to the SIP trunk. In many cases numbers can be ported to the SIP Trunk.

Benefits of SIP Trunking

Our farewell to the PSTN brings many benefits. SIP Trunks deliver:



ComNetwork Co., Ltd. is an official partner of 3CX phone system!

 3CX is a Global Leader in IP PBX markets! Below are the lists of major corporations using 3CX IP PBX system. 

If you have any further queries, please contact us at your convenience.