What is ITSP? What do you need to know to be ITSP?

ITSP stands for Internet Telephony Service Provider. It is a type of company that provides calls and other communication services over the Internet. Before ITSP, we used PSTN and mobile phones for communications over ISDN lines, which use a traditional SS7 network.

With the extensive coverage of the Internet and its high bandwidth. The Internet has become a new network for voice and media. An ITSP uses IP-based telephony protocols over the Internet to facilitate VoIP.

The following are a few protocols over the IP network for VOIP.

  1. SIP, session initiation protocol.
  2. MGCP, media gateway control protocol.
  3. Megaco
  4. RTP, Real-time protocol
  5. SDP session description protocol
  6. H.323

What infrastructure does an ITSP need to operate?


Thanks to the VOIP for using existing IP-based infrastructure. An ITSP uses VoIP for telephony. It requires basic hardware, a computer server, Ethernet cards, switches, etc. This contrasts legacy telephony(PSTN), which uses special TDM-based hardware. The ITSP hardware includes high-performance servers, switches Etc.

  • VOIP Servers:
  • SMPP Software:
  • Web portal for plans and creating VoIP accounts.
  • Software for billing.

How to become an ITSP?

There are two main components to becoming an Internet telephony service provider. First is infrastructure, which includes hardware, software, and marketing or sales team. Another one is to get connected to the VoIP providers. You may sell better-calling options for international and local calls once connected to many VoIP providers over an efficient network and competitive pricing for routes and coverage.