In modern day usage, "foreign exchange office" (FXO) and "foreign exchange station" (FXS) refer to the different ends of a telephone line in the context of voice over IP (VoIP) systems and its interconnection with analog telephony equipment. The FXO side is used for the telephone, and the FXS side is the analog telephone adapter.

2024年2月23日 · FXO and FXS are the ports used by POTS (Plain Old Telephone Service) or an analog phone line. The two ports are always paired together to make a call. An FXO port connects to the PSTN and receives the line, while an FXS port connects to end-user devices and provides the necessary signals like dial tone and ringing.

FXO：外汇办公室，是一个将FXO设备连接到外线电话线的端口。 FXO端口是办公室电话、模拟传真机或调制解调器上的插头。 因此，FXO接口接收来自公共交换电话网络 (PSTN)中心局的POTS服务并生成环路闭合。 FXS和FXO端口如何工作？ 为了建立呼叫，必须连接FXS和FXO端口。 这适用于出站和入站呼叫。 当您拿起连接到FXS端口的模拟电话（FXO设备）时，您拨打一个号码并使用PSTN服务连接到另一端。 您在办公电话上拨打的号码被编码为 DTMF 或双音多 …

2018年9月7日 · 所谓FXO (Foreign eXchange Office)， 是用来连接局端设备与交换机内线来使用，可以送出DTMF讯号与拨号动作，所以能连接局端的电话线。 其基本电路包括CODEC与数据存取装置 (DAA)。 CODEC与 FXS的功能相同，将模拟语音转换为数字信号，随后再转换回来。 DAA模拟 (POTS)电话功能，其重要作用是去除高电压直流偏置，将PSTN环路关闭，从而仅传送来自PSTN的模拟交流信号。 因此，如何区分FXS和FXO口，光是从接口的形状来看，两者是一 …

FXO (Foreign Exchange Office) is the port that receives the analog line. It is the plug on the phone or fax machine or the plug (s) on your analog phone system. It delivers an on-hook / off-hook indication (loop closure). Since the FXO port is attached to a device, such as a fax or a phone, the device is often called the “FXO device.”

简单来说，fxo接口是网关用来接收来自电信公司提供的 模拟电话线路 信号的输入端口，它负责将模拟信号转换成 数字信号 ，以便通过 ip网络 进行传输。

FXS (Foreign Exchange Subscriber) is the port that delivers POTS service from a phone company’s Central Office within the PSTN (Public Switched Telephone Network) to devices such as analog phones and fax machines. In other words, it is a wall jack that points away from the Central Office to the subscriber, or end device.

FXO, or Foreign Exchange Office, refers to the port or interface used in telecommunication devices like analog phones, fax machines, or PBX provider (Private Branch Exchange) systems. An FXO device connects to the Public Switched Telephone Network (PSTN) and acts as the recipient of analog line signals.

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.

2018年6月29日 · FXS is an RJ11 port that connects internally to an analog office phone or fax machine. Think of the S as meaning a station or a cubicle. Any FXS port is going to connect to an analog DEVICE and the cable from the port to the device will never leave the building.