International dialling prefix. Contents. An international dialling prefix is a telephone dialling code used to dial out of a country when making an international call. It's also called international access code, International Direct Dialling (IDD) code, exit code, international call prefix, etc.
Routers are small electronic devices that join multiple computer networks together via either wired or wireless connections. In technical terms, a router is a Layer 3 network gateway device, meaning that it connects two or more networks and that the router operates at the network layer of the OSI model. Routers contain a processor (CPU), several kinds of digital memory, and input-output (I/O) interfaces.
A Wired only router is one that only has  ethernet ports connecting it to the computers/devices. There is no  radio transmitter in it.   Most routers have both now, usually 4 ethernet ports and  the wireless radio as one, so you can connect wireless or wired  devices to the router at the same time.