The DSL modem must match the used xDSL technology and should be purchased in the country of use. DSL connections can use different coding methods, which differ from country to country.
A modem either has one RJ45 connector for connecting the router or has a built-in router. The router must be configured. The modem needs an access code from the Internet Service Provider (ISP).
If the telephone line is to be used for DSL and telephony, a DSL splitter that splits the phone and data signals is necessary.
TV cable-based method
The operator provides the modem. Sometimes, you have to configure the modem. Usually, the cable operator provides a preconfigured modem or the modem configures itself automatically when you connect it for the first time. The modem has an RJ45 connector to connect it to the IP network (the router) or a built-in router. The router must be configured. Sometimes you need to enter an access code received from the operator.
A separate DSL splitter for splitting TV and data signals is not necessary.
Metro ethernet is usually not implemented in a BACS project and is therefore not described in this document.
Use of mobile telephone networks (GPRS/UMTS/LTE)
Several suppliers offer GPRS/UMTS/LTE modems, e.g., modems for private use and modems for industrial applications (also top-hat rail).
Because of the attenuation of the walls and ceilings, the signal inside a building can be weak, that is, an antenna must be placed on the exterior of the building, preferably on the roof.
You can get the best signal strength when the nearest base station of the mobile network you want to use is not too far away and there are no large obstacles between the base station and the modem's antenna (line of sight). Directional antennas improve the transmission quality, but must be optimally directed towards the base station.
The antenna cable between the modem and the antenna must be short, otherwise the signal is too weak. Observe the manufacturer's information on the cable type and maximum length. Antenna cables may not be bent or pinched too severely. The mobile modem must be placed near the optimum antenna location. The length of the cable to the IP network is not that critical.
The mobile network operator provides the SIM card. SIM cards come in various sizes, depending on the modem. Choose the correct SIM card.
The modem is connected to the IP network. The safety measures depend on the modem.
GPRS modems with an RS-232 connection can be connected to some PX controllers using a USB-RS-232 converter.
RF-based access networks
Since there are different technologies, an RF-based access is only implemented in tight cooperation with the network operator. We recommend that you strictly follow his guidelines.