SIP Trunking

Allstream’s Next Generation SIP Trunking combines your Voice and Data network to offer increased simplicity, flexibility and cost savings.

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Industry-Leading SIP Solutions for Business by Allstream

SIP Trunking

Next Generation SIP Trunking gives businesses the power to consolidate their voice and data, securely and efficiently, into a single centralized advanced IP network, reducing complexity and the frustration of managing multiple connections.

With a state-of-the-art geo-diverse network, businesses of all sizes in all industries can benefit from carrier-grade resiliency and reliability offered by Allstream’s NGN SIP Trunking solution.

NGN SIP delivers, with its Active-Active configuration, immediate fail-over protection which is superior to many other SIP Trunking solutions that offer only an Active-Standby configuration. This advanced architecture eliminates risk of single-point-of-failure and ensures high availability through NGN SIP’s multi-nodal, geo-redundant network (Canada only at this time).

With built-in resiliency, along with support for multiple re-routing and fail-over options, businesses can now operate normally during a disruption without service quality degradation or performance impact.

Now available over Allstream MPLS, Allstream Internet, or third-party provided Internet, all businesses across North America can benefit from the advanced features and functionality delivered exclusively by Allstream NGN SIP Trunking.

Come for the Cost-Savings, Stay for the Features

Next Generation SIP Trunking empowers businesses through increased productivity, unparalleled resiliency and redundancy, and by simplifying IT operations while delivering significant cost savings.

Businesses can save up to 40% in telecom costs through network consolidation, shared capacity across all locations, free long distance calls (on-net), lower trunk costs, and more. As businesses move from traditional PRI to SIP, they can eliminate redundant channels and only deploy and pay for the capacity they need.

Additionally, Intelligent Trunk Pooling allows multi-site businesses to pool and burst call capacity effectively across all sites in order to optimize trunk utilization which lead to lower costs and better call management during peak periods without the risk of service interruption.

Fiber optic in data center

Next Generation SIP Trunking provides an optimized environment for advanced unified communication and collaboration solutions, making it possible for these applications to be more widely and easily available across a business’ network.

With DIDs now available across North America, NGN SIP Trunking is the solution for meeting the advanced communications needs of today’s business.


Additional benefits of Next Generation SIP Trunking include:

Eliminate Redundant Trunks

Many businesses today are paying for more capacity than they require, as the TDM voice channels are offered in fixed clusters of 23. SIP Trunking offers scalability and eliminates redundant channels, allowing businesses to deploy and only pay for the capacity they need.

Trunk Pooling

Rather than over-provisioning capacity at all branch offices in order to meet peak demand, SIP Trunking allows customers to efficiently pool concurrent call capacity across multiple locations. Reducing the total number of trunks required results in better management of peak load demand and lower risk of service interruption.

Local Number Portability

Whether your business is moving from TDM Voice to SIP or simply relocating, you can quickly and easily port an existing number, via an online portal, without any complications – no matter where.

Virtual Presence

With SIP Trunking, callers can dial a local number even in areas where your business has no physical presence. Allstream is the only telecommunications company that can seamlessly provide DIDs and DTEs anywhere in North America.

Self-Serve Administration Portal (currently Canada only)

Have total control over your business’ network infrastructure along with comprehensive reporting in near real-time.

Improved Productivity

With better, faster and more flexible business-grade communication offering the highest audio quality, businesses benefit from a better call experience.

Unparalleled Expertise and Experience in SIP Trunking

Allstream was the first service provider to offer SIP Trunking in Canada and the United States. With over 10 years of SIP Trunking experience, Allstream is committed to delivering the best possible solutions, backed by industry-leading technology, with unmatched expertise and customer service. In addition, Allstream’s certified partnerships and testing facilities ensure a SIP Trunking solution that works for every business.

How Allstream NGN SIP Trunking Works

Allstream NGN SIP Trunking leverages IP and Internet technologies to allow businesses to converge their voice traffic onto a single network. Using a Multiprotocol Label Switching (MPLS) data network, Allstream Internet, Allstream Ethernet over Copper (USA only) or third-party provided Internet access, Allstream NGN SIP Trunking supports a rich set of telephony features backed by superior management functionality and outstanding reliability.

  • Data, Internet and Voice traffic is consolidated onto a single, high-speed IP network, simplifying network management and improving capacity utilization.
  • The network is connected to the PSTN via Allstream NGN SIP Trunking, eliminating the need for PRI connections at each office.
  • SIP Trunks connect directly to your IP-PBX, or through the use of the Allstream SIP PRI Connect Gateway which can be configured with PRI signaling to connect easily to any legacy PBX.
  • Voice traffic is now carried over the data network, with optional fail-over capacity via a second connection to the PSTN in case of network failure.
  • Voice quality is assured through Class of Service (CoS) or prioritization of voice calls over other traffic, ensuring reliable phone service free of jitter, latency or echo.
  • With an advanced architecture including multiple Session Border Controllers (SBCs), media gateways and active-active fail-over geo-redundant core nodes, Allstream NGN SIP Trunking provides industry-leading resiliency and reliability for all your communications and collaborations needs.
  • Now available: North American wide DIDs for local presence no matter where a business operates.

Choose a SIP Option That Works for You

Combine options. Upgrade at your own schedule. Flexible pricing and contract terms. Various network delivery options.

SIP Trunking Options

Gain More Control Over Your Communications Infrastructure

The Allstream NGN SIP Trunking Administration Portal is a self-serve portal with 24/7 secure access, empowering businesses with greater control and a simplified view of voice service utilization and recent transactions.

With on-demand scalability of call processing capacity, along with easily actioned moves/adds/changes, SIP services can be quickly and easily applied as needed.

With extensive reporting (some services are optional and fees may apply), businesses can make better decisions by having greater visibility through a detailed dashboard providing network insights and comprehensive pre-defined and fully customizable operational reports.

VoIP911 Service

NGN SIP Trunking includes a new improved emergency calling service called VoIP 911, designed for VoIP users.  This service meets Canadian Radio-television and Telecommunications Commission (CRTC) requirements for emergency calling from “nomadic” callers. SIP/VoIP is considered a nomadic service meaning that users can access and use the system features and calling capabilities wherever they may be and not necessarily at their enterprise office location. When using the service, the CRTC requires that 911 calls from SIP/VoIP users be processed by a certified emergency services operator for verification of the physical location of the caller.

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