Overview
This section describes configuration of the Gateway application. The Gateway application refers to IP-to-Tel and Tel-to-IP call routing. The term Tel refers to:
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FXS equipment such as a fax machine or plain old telephone service (POTS) |
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FXO equipment such as a PBX |
IP-to-Tel refers to calls received by the device from the IP network and then sent to the PSTN or an analog endpoint connected directly or indirectly to the device. Tel-to-IP refers to calls received by the device from an analog endpoint connected directly or indirectly to the device or the PSTNand then sent to the IP network.
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FXO (Foreign Exchange Office) is the interface replacing the analog telephone and connects to a Public Switched Telephone Network (PSTN) line from the Central Office (CO) or to a Private Branch Exchange (PBX). The FXO is designed to receive line voltage and ringing current, supplied from the CO or the PBX (just like an analog telephone). An FXO VoIP device interfaces between the CO/PBX line and the Internet.
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FXS (Foreign Exchange Station) is the interface replacing the Exchange (i.e., the CO or the PBX) and connects to analog telephones, dial-up modems, and fax machines. The FXS is designed to supply line voltage and ringing current to these telephone devices. An FXS VoIP device interfaces between the analog telephone devices and the Internet.
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