The SIP Trunking Technology

VoIP and SIP are technologies that are innovated for better communication services. Session Initiation Protocol trunking or SIP trunking is an offered service by a provider of communication services that utilizes the protocol to make available the connectivity for voice over IP or VoIP between phone systems that are within the premises and the PSTN or public switched telephone network. SIP is utilized for establishing call, management as well as teardown. Usually, SIP trunking is vended as a substitute or alternate for digital Primary Rate Interfaces or PRIs that are established on time-division multiplexing or TDM.

Session Initiation Protocol trunking is broadly arrayed by providers of communication services worldwide, wherein numerous of them are making use of it to change their services that are TDM-based.

By means of providing SIP trunking over current Multiprotocol Label Switching (MPLS) or Ethernet network arrangement or structure, the providers lessen the outlay as well as the difficulty in the management of concerns related to digital platforms, while at the same time providing added features.

Pros of SIP trunking

From the standpoint of customers, SIP trunking presents greater flexibility in terms of purchasing than TDM. Normally, TDM trunks provisions for 23 voice channels at minimum, while SIP trunks could be obtained in any augmentation without needing a devoted WAN or wide area network circuit. Clients may put into operation SIP trunks even with WAN services that are existent, WAN connections or the public internet as well.

SIP Trunks – How does it work?

Usually, the structural designs of SIP trunking support an SBC or session border controller to arbitrate the connectivity of the SIP trunk and the phone system that are on-premises. Session border controllers grant a focal point for security to be manage, policy on call routing, numbering plans as well as voice codecs transcoding. A few features of SIP trunking providers may include the following:

  • Ability to encrypt voice calls for better security
  • Calls are routed to 911 services, with the correct location information of the caller
  • Protection and security against toll scams or frauds
  • Interconnection with mobile networks so that when there is a call on the cellphone, the desktop phone also rings