However, there are many other types of telephone jacks which are used in various countries throughout the world. In those countries, you will need a telephone adapter jack to make the connection between the RJ-11 jack on the end of your modem's telephone line and the telephone jack. This is important because it might be necessary to dial manually and activate the modem once a connection has been made. This may be necessary when making a connection through a hotel's switchboard.
Many large hotels use digital phone systems.
Fortunately, many of the larger hotels recognize this problem. Their digital phones often have a data port into which you can plug your modem. A few countries use more than one version. Unlisted countries are the same as the United States. Red L.E.D. indicates a digital system.