Local SIP trunking
Use local numbers and local termination in a specific market to present a local presence and support regional calling.
SIP Trunk
Global SIP trunking for cloud voice
Connect your PBX, SBC or contact center to local and international numbers in 93 countries and regions—with inbound and outbound voice, elastic channels and secure SIP connectivity.
Overview
What is SIP trunking?
A SIP trunk connects your phone system to a carrier network over IP, replacing analog or digital lines. It supports inbound DIDs and outbound calling, and scales with your channels.
Use SIP trunking to connect an on-premise PBX, contact center or branch office to cloud voice services and global numbers.
Capacity, codecs, failover and security should be planned with your PBX or SBC configuration.
93Countries and regions
Inbound + outboundVoice connectivity
TLS/SRTPSecure SIP where supported
Deployment Models
Local and international SIP trunking
Choose the model that fits your markets and call flows.
International (A–Z) SIP trunking
Connect calls between markets with international termination and global numbers, using one SIP configuration.
Local trunking is often used for regional customer service and local presence. International trunking supports distributed teams, cross-border operations and global contact centers. The right mix depends on your call flows, number requirements and compliance obligations.
Availability, number types and regulatory requirements vary by market.
Coverage
Numbers and connectivity across 93 countries and regions
Use local DIDs and SIP connectivity in the markets where you operate.
Local numbers
Choose local DIDs for customer-facing teams and regional operations.
International termination
Connect outbound calls to global destinations through one SIP trunk.
Number porting
Port existing numbers where supported by the market and carrier.
One configuration
Use a consistent SIP setup across markets and locations.
93Countries and regions
5,600+Area codes
Coverage, number types and portability depend on the market and current inventory.
Why Vanttel
A SIP trunk built for business-critical voice
Combine global reach with the controls your voice team needs.
Quality routing
Route calls over managed voice infrastructure with monitoring and support.
Secure SIP
Use TLS/SRTP where supported, IP or credential restrictions, and fraud monitoring.
Elastic capacity
Scale channels with your call volume and peak traffic.
PSTN replacement
Replace analog or digital lines with IP connectivity while keeping your PBX.
Number portability
Keep existing numbers where porting is supported.
Management and support
Configure numbers and routing through the platform, with access to voice specialists.
Features depend on the number type, market and PBX/SBC configuration.
Use Cases
Where SIP trunking fits
Connect the phone systems your teams already use.
PBX connectivity
Connect an on-premise PBX to cloud voice and global numbers.
Contact centers
Support inbound and outbound calling for service teams.
Branch offices
Standardize voice connectivity across distributed sites.
Cloud PBX integration
Add SIP connectivity to cloud voice platforms and applications.
How It Works
From number selection to go-live
Choose numbers
Select the DIDs and markets for inbound calls.
Configure your PBX or SBC
Set up SIP credentials, codecs and routing.
Test calls
Validate inbound, outbound and failover behavior.
Go live
Monitor capacity, quality and security after launch.
Pricing
Pricing built around your call profile
SIP trunking pricing depends on numbers, destinations, concurrent channels and volume.
Numbers
Local and international DIDs, subject to market availability.
Channels
Capacity sized to concurrent calls and peak traffic.
Destinations
Outbound rates vary by country and destination.
Support
Deployment and routing support from voice specialists.
We quote based on your numbers, destinations, channels and volume rather than a one-size-fits-all price list.
Compliance
Plan for local rules and continuity
Before you launch, confirm the requirements for each market:
- Number documentation and local regulatory requirements.
- Emergency calling support and configuration.
- Caller ID and number presentation rules.
- Security controls, access restrictions and fraud monitoring.
- Continuity and failover planning for business-critical calls.
Requirements vary by country and number type. Confirm emergency calling and regulatory obligations before relying on SIP trunks for critical services.
FAQ
Common questions about SIP trunking
What is a SIP trunk?
A SIP trunk is an IP connection between your phone system and a carrier network. It carries inbound and outbound calls without physical analog or digital lines.
What is the difference between local and international SIP trunking?
Local trunking uses numbers and termination in a specific market. International trunking connects calls between markets through global numbers and international termination.
Which countries are supported?
Vanttel covers 93 countries and regions for numbers and voice connectivity, subject to current inventory and market requirements. Tell us your target markets and we will confirm availability.
Can I keep my existing numbers?
In many cases, numbers can be ported or connected, subject to carrier and market requirements. We will confirm during onboarding.
Do you support number porting?
Yes, where the market and carrier support porting. Timing and documentation depend on the number type and country.
How many simultaneous calls can I handle?
Capacity depends on your channel configuration and peak traffic. We size channels with you based on expected concurrency.
Which PBX systems are supported?
Standard SIP-based PBX, SBC and contact center platforms can connect. We will confirm interoperability for your platform.
Which codecs are supported?
Standard codecs such as G.711 and G.729 are commonly supported. Confirm the codec profile for your PBX or SBC during deployment.
Is SIP trunking secure?
Use TLS/SRTP where supported, restrict access by IP or credentials, and monitor fraud and unusual traffic.
Can I use SIP trunking to replace PSTN lines?
Yes. SIP trunking can replace analog or digital lines while keeping your PBX, subject to local requirements and number availability.
Do you support caller ID / CLI?
Number presentation depends on the market, number type and carrier rules. We will confirm what can be presented for your numbers.
What redundancy and failover options are available?
Plan routing and failover with your PBX or SBC. Available options depend on the deployment and the markets involved.
What about emergency calls?
Emergency calling requirements vary by market. Confirm support and configuration before relying on SIP trunks for emergency calls.
How is SIP trunking priced?
Pricing depends on numbers, destinations, concurrent channels and volume. Request a quote for your call profile.
Do you provide a price list?
We quote based on your numbers, destinations, channels and volume rather than a one-size-fits-all price list.
How long does setup take?
Timing depends on number availability, porting and configuration. We will confirm the expected timeline during onboarding.
Get Started
Plan a SIP trunk deployment
Tell us about your PBX, target markets and calling profile. We will help you review numbers, capacity and routing.