SIP Trunking
Learn what SIP trunking is, how it works in VINSI.AI, and how to configure trunks for inbound and outbound calling.
Created April 18, 2025 · Updated April 22, 2025
What Is SIP Trunking
SIP trunking (Session Initiation Protocol trunking) is a digital method for making and receiving phone calls over the internet instead of traditional phone lines.
It allows businesses to connect their communications systems to the Public Switched Telephone Network (PSTN) using IP-based infrastructure, enabling scalable, flexible, and cost-effective voice communication.
For a deeper technical explanation, refer to our custom telephony guide.
VINSI SIP Endpoint
When configuring SIP trunking with VINSI.AI, you will use the following SIP endpoint:
sip:lk.vinsi.aiThis endpoint is used to route SIP traffic between your communications infrastructure and VINSI.AI.
Terms and Definitions
Trunk Name
The Trunk Name is a unique identifier assigned to a SIP trunk. It helps distinguish between multiple trunks within VINSI.AI and simplifies management and configuration.
You can choose any descriptive name that fits your organization, such as MainOfficeTrunk or SalesDeptTrunk.
SIP Termination URI
A SIP Termination URI (Uniform Resource Identifier) is the address used by your communications system to route outbound SIP traffic to a SIP trunk provider.
This URI acts as the destination endpoint for calls leaving your system and being sent to the PSTN through the SIP trunk.
Authentication (Username & Password)
Authentication credentials are optional depending on your call flow.
- Inbound-only calls: Username and password are not required
- Outbound calls: Username and password are recommended
Note: It is possible to use an unsecured termination URI without authentication. This configuration should only be used when appropriate security controls are in place.