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What is SIP Trunking?
SIP Trunking is a service that permits businesses that
have a PBX installed to use Voice-over-IP (VoIP) even to outside the enterprise
network by using the same connection as the Internet connection.
A SIP Trunk is a service offered by an ITSP to use SIP
to setup communications between an enterprise PBX and the ITSP.
Main component which includes deploying SIP trunks: a
PBX with a SIP-enabled trunk side, an enterprise edge device understanding SIP and
an Internet telephony or SIP Trunking service provider.
The SIP trunk is offered by an ITSP (Internet Telephony
Service Provider). A single trunk includes multiple voice sessions.
Advantages of SIP trunk over non-SIP trunk
SIP trunk provides huge cost savings. They eliminate the
need to purchase costly BRIs, PRIs or PSTN gateways.
It opens a new scope of establishing other types of real
time communications beyond LAN.
There are more specific Quality of Service (QoS) measures
to ensure better and calculated voice quality.
SIP trunks can be more reliable than the traditional PSTN
as a number of failover solutions can be implemented.
Unlike in traditional telephony, where bundles of physical
wires were once delivered from the service provider to a business, a SIP trunk allows
a company to replace these traditional fixed PSTN lines with PSTN connectivity via
a SIP Trunking service.
As many organizations are already using VOIP, it’s not
too much difficult to implement SIP Trunking with other VOIP enabled organizations.
No need to invest in PSTN gateways and additional line
cards as you grow.
Calls to anywhere in globe at the local call rate.
Redundancy with multiple service providers and links.
Related Article:
SIP Trunking and
Best Practices
Using IP Trunking to maximize value
creation
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