Enterprise SIP Trunks

Modernize enterprise voice with secure, scalable SIP connectivity that integrates existing PBX and cloud communications platforms while reducing telecommunications complexity and costs.

OVERVIEW

Modernize Enterprise Voice Connectivity

Inteltel Enterprise SIP Trunking connects your existing PBX or unified communications environment to Inteltel’s voice network using Session Initiation Protocol (SIP). It provides a flexible IP-based alternative to traditional voice trunks while helping enterprises consolidate voice connectivity, scale calling capacity, and support distributed locations.

The solution can integrate with existing communications infrastructure while providing a foundation for future UC, cloud communications, and hybrid voice strategies.

Benefits

Flexible Voice Connectivity. Scalable Capacity. Enterprise Reliability.

Inteltel Enterprise SIP Trunks connect your PBX or unified communications platform to the public telephone network over IP. Scale calling capacity as your needs change, support distributed locations, and build a voice service around your existing communications environment.

Scale with demand

Adjust calling capacity as your workforce, locations, and call volumes change.

Support existing systems

Connect compatible PBX and unified communications platforms.

Consolidate voice connectivity

Simplify how business locations access external calling.

Plan for continuity

Configure call routing options for service interruptions or site outages.

Enable a migration path

Transition from PRI or other legacy voice services in planned stages.

Improve visibility

Review call activity and service performance using available reporting and monitoring tools

Why Choose Inteltel?

You can move to SIP in one cutover or in phases. The approach depends on your environment, number porting, and migration plan.

An enterprise SIP trunk uses Session Initiation Protocol (SIP) to carry call signaling between your PBX or unified communications platform and Inteltel’s voice network. Calls then route to and from the public switched telephone network (PSTN).

Infrastructure-aware planning

We consider your PBX, network, internet connections, and site requirements together.

Migration guidance

We help plan number porting, testing, phased cutovers, and fallback procedures.

Business-focused routing

Call flows can be designed around your locations and continuity requirements.

Ongoing service support

Get assistance with service changes, troubleshooting, and capacity planning.

What Sets Us Apart?

Voice Migration Support

Ready to Support AT&T, Verizon & Lumen Customers

If your organization is evaluating alternatives to its current voice and communications provider, Inteltel can help you transition with confidence.

We help enterprises migrate from legacy and existing carrier voice environments to flexible SIP Trunking, enterprise voice, and unified communications solutions designed around their business requirements.

Our team works with you to assess your existing environment, develop a migration strategy, coordinate number porting and service activation, and minimize disruption throughout the transition.

Move Forward with Confidence

Seamless Migration

A structured transition plan designed to minimize disruption to users and business operations.

Enterprise SIP Trunking

Scalable IP-based voice connectivity for existing PBX and unified communications environments.

Business Continuity

Failover, overflow, and resilient call-routing options help maintain communications during service disruptions

Number Porting & Transition Support

Coordinated migration of existing business telephone numbers and voice services.

Unified Communications Ready

Build a foundation for cloud communications, collaboration, mobility, and hybrid UC environments.

Technical Specifications

Inteltel Enterprise SIP Trunking connects your business phone system to the public telephone network over IP. Configure trunks for inbound, outbound, or two-way calling across one or more trunk groups, with capacity designed around your enterprise’s needs.

Optional overflow and failover routing can help keep calls moving during busy periods or a service interruption when these features are included and configured. Inteltel supports the service with quality-of-service management, service-level agreements, and 24/7/365 expert support.

ENTERPRISE SIP TRUNKING

A managed voice path from your PBX to Inteltel services and applications

CUSTOMER PBX

Existing voice system

01

VOICE GATEWAY

Enterprise Session Gateway (ESG)

02

eMTA / METRO E SWITCH

Voice access handoff

03

INTELTEL ACCESS NETWORK

Managed voice transport

04

INTELTEL BACKBONE

IP voice network

05

APPLICATION SERVERS

06 Modernize enterprise voice with secure, scalable SIP connectivity that integrates existing PBX and cloud communications platforms while reducing telecommunications complexity and costs. Inteltel SIP Trunking graphic featuring:

SIP TRUNKING FEATURES

Reliable, flexible, and secure voice connectivity for the modern enterprise

Scalable Capacity

Easily add or modify SIP trunks to match your call volume and business growth needs.

Flexible Configuration

Support for inbound, outbound, or two-way calling with single or multiple trunk groups.

High Reliability & Continuity

Built-in features like Overflow and Failover help ensure you never miss a call due to high call volume or an outage.

Quality of Service (QoS)

Dedicated bandwidth and prioritized voice traffic to deliver clear, consistent, high-quality calls.

Wide PSTN Coverage

Access to a nationwide voice network with local, national, and international calling options.

Integration Ready

Works with existing PBX systems and unified communications platforms for a seamless deployment.

Advanced Call Management

Features such as call routing, number management, caller ID, and analytics provide greater control and visibility.

Expert Support & SLA

Backed by Inteltel's service level agreements and 24/7/365 expert support.

LOW-COST INTERNATIONAL CALLING

Connect Globally. Pay Only for What You Use.

Contact Inteltel for competitive international calling rates with per-minute pricing designed for businesses that need flexible global communications.

With pay-per-minute international calling, you can control costs without committing to an international calling plan that may include minutes your business never uses.

Simple, Flexible International Calling

Competitive International Rates

Cost-effective calling to destinations worldwide.

Per-Minute Pricing

Pay based on actual international calling usage.

No International Plan Subscription Required

Avoid unnecessary recurring international calling packages

No Wasted Bundled Minutes

Pay for the international minutes your business actually uses.

Enterprise SIP Trunking Integration

Add international calling to eligible Inteltel SIP Trunking and enterprise voice services

Business Support

Contact Inteltel for destination-specific rates and service availability.

READY TO MODERNIZE YOUR NETWORK?

Contact us for current per-minute rates for the countries your business calls.

Inteltel Voice & Collaboration

Connect locally. Communicate globally. Pay for what you use.