What is a FXS card?

FXS stands for foreign exchange subscriber. An FXS port is an interface that connects station devices such as your phones or PBX to a VoIP adapter. FXS is an RJ11 port that connects internally to an analog office phone or fax machine.

What is a PSTN card?

PSTN stands for Public Switched Telephone Network, or the traditional circuit-switched telephone network. PSTN phones are widely used and generally still accepted as a standard form of communication.

What is FXS port in router?

FXS stands for Foreign Exchange Subscriber, a port that connects the router or access server to end-user equipment such as office phones, fax machines, or modems.

What does Fxo stand for?

Foreign eXchange Subscriber (FXS) and Foreign eXchange Office (FXO) are the names of the two most common interfaces (ports or plugs) found in analog telephony environments. Analog telephony, also known as Plain Old Telephone Service (POTS), is the service the local phone company typically delivers to your home.

What is an FXS gateway?

An FXS gateway is used to connect one or more lines of a traditional PBX to a VoIP phone system or provider. Alternatively, you can use it to connect analog phones to it and re-use your analog phones with a VoIP phone system.

What is an analog gateway?

Analog VoIP gateways are small stand-alone appliances which allow you to convert voice media between FXO and FXS connections and VoIP connections. They are the most cost-effective solution for businesses with a legacy phone system infrastructure which want to connect to a VoIP network, such as a SIP trunk.

Do mobile phones use PSTN?

Voice communications continue to rely heavily on the PSTN. Mobile phones can’t function without the PSTN. The modern PSTN still has plenty of copper wire in it, but it also includes fiber optic cables, cellular networks, communication satellites, and undersea cables.

How does a landline phone work?

It is a device which converts human speech in the form of sound waves produced by the vocal cord to electrical signals. These signals are then transmitted over telephone wires and then converted back to sound waves for human ears.

Can an IP phone be used on an analog line?

A: Unfortunately, no. You will need SIP Service to run voice over IP and SIP Service is provided from a provider, not a device. An FXO gateway is for IP Service coming into an analog device. an FXS gateway is for an IP PBX to connect to an Analog endpoint.

Do I need FXO or FXS?

FXS & FXO & VoIP If you want to connect an analog fax machine to the phone system, you will need at least one FXS port. If you want to use analog telephone lines with your phone system, you need one FXO port per line.

What does a VoIP Gateway do?

What is a VoIP gateway? A VoIP gateway is a piece of hardware with the standard purpose of converting TDM telephony traffic from the PSTN into digital packets IP packets for transport over an IP network (such as your LAN).

What does FXS stand for on a PBX?

FXS stands for foreign exchange subscriber. An FXS port is an interface that connects station devices such as your phones or PBX to a VoIP adapter. FXS is an RJ11 port that connects internally to an analog office phone or fax machine.

What do FXS and FXO mean and how do they work?

If you want to use analog telephone lines with your phone system, you need one FXO port per line. To connect analog phone lines to an IP phone system you need an FXO gateway. This allows you to connect the FXS port to the FXO port of the gateway, which then translates the analog phone line to a VoIP call.

Is the vic-4fxs / did card in FXS mode?

4 The VIC-4FXS/DID card can operate in both FXS (default setting) and DID modes on the Cisco 2801. On other ISR platforms, the VIC-4FXS/DID card only operates in FXS mode until the IOS 12.3 (14)T release where both modes of operation are available for the VIC-4FXS/DID card on the Cisco 2811, 2821, 2851, 3825, and 3845 ISR platforms.

Where can I get a FXS / FXO gateway?

FXS/FXO gateways are widely available. 3CX automatically configures FXS/FXO gateways to allow you to easily continue using your existing PSTN lines and/or analog phones. You can get your free licence here. More information about FXS/FXO and VoIP, in general, can be found in our Basic Training Videos.