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When you sell a few thousand VoIP gateways every year you end up fielding A LOT of questions. Funny thing is the same questions about VoIP gateways get asked over and over again.
The FAQ that you’re about to read about VoIP gateways has been compiled over the last five years. It contains the most commonly asked questions from folks just like you.
After reading this if you still have questions about VoIP gateways please give VoIP Supply a call at 800.398.8647. A VoIP gateway expert will be happy to answer your questions.
A VoIP gateway is a piece of hardware that converts TDM telephony traffic from the PSTN into digital packets IP packets for transport over an IP network (such as your LAN). A VoIP gateway can also convert digital IP packets into TDM telephony traffic for transport across the PSTN (Publicly Switched Telephone Network).
Yes. There are two main types of gateways that you need to concern yourself with – analog and digital.
An FXS port is an interface on that allows station devices such as analog telephones to connect to a VoIP gateway.
An FXO port is an interface that allows POTS lines to connect with a VoIP gateway.
Although both FXS and FXO gateways are classified as analog gateways and they both convert analog voice stream to digital voice packets (and vice versa) for transfer over an IP network, the devices that they interface with are vastly different. FXS gateways, because they have FXS ports, connect analog telephones to an IP network. FXO gateways, because they have FXO ports, connect POTS (Plain Old Telephone Service) lines to the IP network.
Yes. There are a few manufacturers that offer VoIP gateways with both FXS and FXO ports.
Yes you can but it depends on the model.
Some VoIP gateways do support T.38, while others do not.
Most VoIP gateways will support standard codecs such as G.711, G.723, G.726, and G.729A.
Yes. Some of your options include: Caller ID with Name/Number, Caller ID Blocking and Call Waiting.
It depends. Most higher-end VoIP gateways such as AudioCodes can be configured to support message waiting indication.
Yes, but in most applications the QoS functionality is performed by a router at the edge of the network. Although VoIP gateways will support QoS it is usually not required as the gateway is only passing voice packets and not data.
Some units do. Contact VoIP Supply at 800.398.8647 for specific units.
Dozens. The three most common applications include:
If you are still hunting for more information about VoIP gateways please read these other educational VoIP gateway items: