Ingate SIP Trunking Module

Connect the IP PBX to a SIP Trunk

For enterprises wanting to make full use of their installed IP-PBXs and not only communicate over IP within the enterprise, but also outside the enterprise the Ingate SIP Trunking module offers an easy and smooth transition to a modern and future-proofed SIP trunk provided by an Internet Telephony Service Provider to connect to the traditional PSTN network. SIP trunks can offer significant cost-savings for enterprises, eliminating the need for local PSTN gateways, costly ISDN BRIs (Basic Rate Interfaces) or PRIs (Primary Rate Interfaces).

What is a SIP Trunk?

SIP trunking is a service offered by Internet Telephony Service Providers (ITSPs) which permits businesses to adopt Voice-over-IP (VoIP) using the same connection as the Internet connection and remain in touch with others who rely on the PSTN as the enterprise IP-PBX is connected to the service provider’s PSTN gateways over the Internet.

NAT/Firewall Traversal

The SIP Trunking software module, working in conjunction with an Ingate Firewall or SIParator, solves the Network Address Translation (NAT) traversal issues that are faced by businesses using a SIP trunk. Together, they control both incoming and outgoing communications and route the communication to the intended users. All voice traffic (as well as data traffic) must traverse the enterprise firewall/NAT. However, SIP traffic cannot traverse traditional enterprise firewalls and NAT devices. As a result, the firewall/NAT device blocks all SIP traffic, which includes VoIP. Ingate resolves this issue, enabling enterprises to utilize SIP trunks.

Advanced Routing Capabilities

Ingate SIP Trunking provides advanced routing capabilities that enable enterprises to connect to SIP trunks. Frequently, the SIP traffic coming from the PBX to be routed to the ITSP (and vice versa) is neither written in the format that the other expects nor contains the correct routing information to get it to its intended destination. Ingate’s SIP Trunking software module can overcome these issues, and provide a seamless connection to and from the provider.

Ingate SIP Trunking can handle authentication at the service provider to validate the enterprise as the correct user of the SIP trunk. It also provides the flexibility to interoperate with carrier-specific requirements like numbering plans.

Support for Multiple SIP Trunks

Eliminating international calling costs, Ingate SIP Trunking can direct international calls to national, or local, PSTN lines within the country being called. Businesses can use multiple service providers by establishing least cost routing rules, and switch between them depending on which offers the best possible rates (which may vary by time, day or location). Long distance calls cost the same as a local call, reducing expenses for businesses as well as their customers, partners, etc. trying to reach, for example, the corporate sales force. The support for multiple SIP trunks also offers redundancy. If a connection to one ITSP goes down, Ingate can immediately transfer the traffic to another ITSP.

ENUM Support

Ingate SIP Trunking supports ENUM. This feature can automatically look up phone numbers to determine whether they match a known SIP address, allowing the call to be completed over the Internet (instead of transferring it out to the PSTN). Since no traffic is placed on the PSTN, ENUM provides an additional means of cost-savings for businesses that communicate with other firms using SIP.

Security Over The Public Internet

Ingate SIP Trunking works with Ingate Firewalls and SIParators to leverage all the security benefits available with SIP communications. Ingate’s enterprise-class Firewalls secure data and SIP traffic, while SIParators secure SIP media while leaving the traditional firewall in place (working in parallel to the SIParator) to secure data traffic. Both products feature Ingate’s full SIP proxy technology, which allows for advanced filtering, verification, authentication and routing, as well as dynamic control of the opening and closing of media ports. They also encrypt the SIP signaling using Transport Layer Security (TLS) and media (voice, video, etc.) using Secure RTP (SRTP). With encryption, sessions are kept private with no chance of eavesdropping.

Startup Tool for SIP Trunking

The Startup Tool is an installation tool for Ingate Firewall® and Ingate SIParator® products using the Ingate SIP Trunking software module, which facilitates the setup of complete SIP trunking solutions. The tool will automatically configure a user’s Ingate Firewall or SIParator to work with the IP-PBX or SIP trunking service provider of their choice. With the push of a button, the configuration tool will automatically create a SIP trunk connection designed to the user’s individual setup.

Read more about the tool here.

Confirmed interoperability

Ingate has confirmed interoperability several of the leading IP-PBX vendors and ITSPs. See the full list here.

For additional information on Ingate SIP Trunking module, please contact info@ingate.com.

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