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The VOS3000 softswitch is widely used by wholesale VoIP operators to manage carrier routing, SIP trunk connections and international telecom traffic. One of the most important tasks in any VOS3000 deployment is configuring SIP trunks that connect the system to telecom carriers or VoIP gateways.
This guide explains the fundamentals of VOS3000 SIP trunk configuration, how carriers connect to the system and how gateways are used for routing outbound VoIP calls.
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A SIP trunk is a connection between the VOS3000 softswitch and an external VoIP provider, carrier or gateway. It allows the system to send and receive calls using the SIP protocol.
Wholesale VoIP operators typically configure multiple SIP trunks so that calls can be routed through different termination providers.
This setup helps operators:
In a typical telecom deployment, SIP trunks connect the softswitch to external networks.
The basic call flow works like this:
This process allows operators to manage call routing across multiple providers efficiently.
VOS3000 supports different types of carrier connections depending on the telecom provider.
Common connection methods include:
Most wholesale VoIP providers use IP authentication where the carrier allows connections only from specific server IP addresses.
To configure routing to a telecom provider, operators first create a gateway entry in the VOS3000 system.
The gateway defines how the system communicates with the external carrier.
Typical gateway parameters include:
After a gateway is created, it can be used in routing tables.
Once a gateway is configured, routing rules determine when the system should use that carrier.
Routing decisions are based on:
For example:
These routing policies allow telecom operators to manage global call traffic efficiently.
One important feature of VOS3000 is automatic failover routing.
If a carrier fails or rejects calls, the system automatically attempts the next configured route.
This improves call completion rates and prevents service disruption.
Failover routing is widely used in wholesale VoIP networks where reliability is critical.
After trunks are configured, operators monitor traffic using VOS3000 statistics and reporting tools.
Important performance metrics include:
Monitoring these metrics helps operators optimize routing and maintain call quality.
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A SIP trunk connects the VOS3000 softswitch to an external VoIP carrier or gateway for call routing.
Yes. Multiple gateways and SIP trunks can be configured to connect different telecom providers.
Yes. If the primary route fails, VOS3000 automatically switches to the next available carrier.
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