SIP Trunking

Your legacy phone system. Our cloud. Connected.


Session initiation protocol (SIP) trunking is cost-effective technology that connects legacy phones and IP PBXs to the cloud without removing or replacing them. With SIP trunking, Vonage makes it easy to update legacy phone systems and get cloud-hosted voice, video, data, text and other unified communications using the scalability of the internet or the power of our network.

What is SIP trunking?

Session initiation protocol (SIP) is the technology and the standard that empowers Voice over Internet Protocol (VoIP) within modern businesses. SIP trunking is the process by which this technology is applied to VoIP systems: SIP trunks replace traditional telephony trunks to bring enhanced communications to both IP networks and legacy systems.


Save money with SIP trunking

By partnering with a SIP trunk provider, you can achieve automated and streamlined routing, offer higher-quality employee experiences, and also enable significant savings.

  • Limit capital expenditures. SIP trunking allows you to add upgraded functionality to your legacy phone system without replacing an entire system
  • Add reliability. By deploying features from the cloud, SIP trunking ensures business continuity and productivity
  • Lower TCO. By getting rid of voice and data hardware systems, SIP trunking can lower your total cost of ownership
  • Customizable. Only pay for the call paths you need instead of being forced to install (and pay for) an entire PRI.

Key Benefits

  • Nationwide coverage for quality, disaster recovery & business continuity, diversity, etc.
  • Redundant Ring Architecture
  • National IP Routing Fabric
  • Multiple Access Options-Ethernet, Dsi, T1, DS3, OCN
  • Multi-site MPLS VPN
  • End-to-End Quality of Service (QOS)
  • 2 Domestic 24x7 NOC's with proactive monitoring and support

Nationwide MPLS Network

Data Centers

PSTN Gateway

Internet/IP Hub

POP

Super POP

QoS on a private managed circuit

The Vonage Enterprise platform is supported by one of the largest private MPLS networks in the country. SIP trunks allow you to connect your legacy phone system to our MPLS network to provide elevated quality of service and allow cloud capabilities on your traditional PBX system. You’ll get four-digit dialing between legacy PBX and the Vonage network users, impeccable call quality, and so much more.


SIP trunking enables cloud communications with high-speed internet

With SIP trunk over a high-speed internet, you can access Vonage cloud capabilities on your traditional PBX. You can even keep your phones. As a top SIP trunk provider, Vonage Business offers private SIP interoperability with Cisco® Call Manager, Avaya®, Asterisk®, Zultys®, and more.


More scalability, call trafficking, and disaster recovery

Many primary rate interface (PRI) systems require the purchase of 23 channels at a time. SIP trunks can be purchased individually so scaling up or down is simple. As a top SIP trunk provider, we also design solutions to handle high call volume and automatic call rerouting, vital to your service if there’s problem on a circuit.

SIP VS. PRI

Vonage SIP Trunks

Virtual connection (voice & data transmission)

One at a time purchase (good scalability)

Business continuity/disaster recovery via automatic call rerouting in the cloud

Little to no hardware investment for deployment

Traditional PRI Systems

Physical connection over a dedicated line (only voice transmission)

Requires purchase of up to 23 channels at a time

Call diversion and rerouting possible (complex setup and expensive maintenance)

Up-front investment in hardware for deployment

Turn your legacy phone system into a communications powerhouse
Consolidate and save
Say goodbye to expensive PSTN gateways, multiple providers, and local voice trunks. Vonage Business with SIP trunking can give you nationwide coverage, all under a single account.
Flexible solution
SIP benefits are numerous and include: enabling communications system migration, automated streamlining measures, fax capabilities, and quality-boosting call environments
Business continuity and better uptime
SIP trunking features reside in the Vonage geo-redundant cloud rather than at your office. In the event of a disaster, calls can be redirected to an unaffected location. Or individual phone numbers can be rerouted to the destination or device of your choice.

Insights from Perspectives

Our Recommended Platform
Reimagine how business gets done
From cloud-hosted phones on your current broadband to UCaaS solutions on a dedicated network, Vonage is partnering with businesses like yours, in ways never imagined. Cost-effective ways. Revenue-building ways. Once thought impossible ways.
Vonage® Enterprise

Enterprise-grade unified communications

One of the nation’s largest purpose-built MPLS networks
Advanced features including conferencing for up to 300 users
Elevated quality of service for voice, video, and data communications
End-to-end managed installation and dedicated service teams
Deep integration ties phone service to top business applications
Enable mobile workers and connect multiple offices seamlessly
Reliable and scalable solutions for inbound, outbound, and multi-site contact centers
Hybrid network and bring your own broadband options with SD-WAN
Call for a free consultation from a business phone system specialist.

Anytime between 8AM - 9PM ET

Or, tell us about your business and a specialist will get in touch.

There was a problem with some of your entries. Please correct the fields marked above.

Thank You.
A specialist will contact you soon.

You can contact us any time by calling 1.877.862.2562 or email sales@vonagebusiness.com.

Get a Quote
Request a Free Quote

There was a problem with some of your entries. Please correct the fields marked above.

Thank You.
A specialist will contact you soon.

You can contact us any time by calling 1.877.862.2562 or email sales@vonagebusiness.com.

Buy Now