What is a VoIP Gateway?
A VoIP gateway allows you to convert between a traditional telephony connection and a modern VoIP connection using SIP.
There are two types of gateways: digital and analog.
- Digital gateways convert voice media between digital TDM connections and VoIP connections.
- Analog gateways convert voice media between FXO and FXS connections and VoIP connections.
Conversions can go from SIP to traditional, traditional to SIP or even SIP to SIP for the purposes of failover or transcoding. In a traditional network to SIP deployment, a gateway significantly reduces operating costs by connecting a legacy business phone system with dynamic SIP trunking services. SIP to traditional network deployments use a gateway to connect a modern SIP communications system with digital or analog service from legacy carriers. There are many applications for VoIP media gateways.
Public Switched Telephone Network T1/E1/PRI to VoIP
A VoIP gateway can connect a modern VoIP-only system, for example a virtualized IP PBX, to a PSTN PRI trunk.
Public Switched Telephone Network Analog to VoIP
A VoIP gateway can connect a modern VoIP-only system to analog telephone lines, analog telephones, and fax machines via FXO/FXS ports.
VoIP Provider to Legacy PBX
An IP Media Gateway can be used to upgrade a legacy business phone system allowing it to use a SIP trunk out to an ITSP. SIP Trunks are more cost-effective than expensive legacy T1 lines.
Legacy PBX to IP PBX Migration
The SIP gateway also acts as a bridge connecting a legacy PBX via a PRI interface and an IP PBX via a SIP connection to support a migration initiative.
VoIP Gateway Terms / Acronyms:
VoIP - Voice over IP
SIP - Session Initiation Protocol
IP - Internet Protocol
TDM - Time Division Multiplexing
PRI - Primary Rate Interface
ISDN - Integrated Services Digital Network
PSTN - Public Switched Telephone Network
ITSP - Internet Telephony Service Provider
FXO - Foreign Exchange Office
FXS - Foreign Exchange Subscriber
Other Names for a VoIP Gateway:
IP Media gateway
Digital Telephony gateway
Test Drive the Best GUI for VoIP Gateways
Want to know how easy it is to set up a Digium gateway? Log in to our demo system and take it for a spin! Digium's award-winning GUI is known for its intuitive design and attractive visual appeal. Everything is easy to manage so you are up and running in minutes. Other gateways are complex and difficult to configure. They cram in unnecessary features, driving up the cost and cluttering the interface. Digium VoIP Gateways keep it simple so you get high performance for SIP conversion and more time to focus on what's important.
Digium G-Series Appliances
Digium’s G080 Series VoIP Gateways are 8-port analog gateways available in 3 separate configurations: 8 FXO ports, 8 FXS ports, & 4 FXO with 4 FXS ports.Read More
Digium’s G100 VoIP Gateway is a single port software-selectable T1/E1/PRI appliance that supports up to 30 concurrent calls.Read More
Digium’s G200 VoIP Gateway is a dual port software-selectable T1/E1/PRI appliance that supports up to 60 concurrent calls.Read More
VoIP Gateways by Digium
What Makes Digium Gateways So Reliable?
Digium IP Media Gateways are industrial grade high-performance appliances. The combination of a state of the art embedded hardware architecture and a software architecture built upon the Asterisk communications engine gives the G-Series its rock-solid reliability.
Digium is the global leader in the manufacture of telephony interfaces cards. Companies have come to trust Digium quality which has been ISO 9000 certified since 2008. When we designed our VoIP Gateway appliances we built upon our years of experience engineering high-quality interfaces. We chose an embedded design so there are no moving parts. This means Digium Gateways run cool and last long.
Asterisk is the world's leading open source communications platform. Deployed in over 170 countries around the world from small businesses to Fortune 500 companies, Asterisk is the engine to use when your business needs to rely on its communications. By leveraging the power of Asterisk, Digium is able to engineer gateways with amazing performance. And, because Asterisk is open source, Digium gateways provide high quality media conversion at an extremely compelling price-point, making Digium Gateways the best value on the gateway market.
Easiest gateways to configure
Built on the powerful Asterisk communications engine
State of the art embedded design for dependable reliability
Best value in business media Gateways