| Worldwide
Guide |
| Listing
of telephone and electric plug styles used in over 250 countries
worldwide (.pdf file). |
| Line
Polarity |
| Explanation
of telephone line polarity and its impact on modem connectivity
and speed. Includes references to modem saver line polarity
testers and correctors. |
| Digital
Phone Lines |
| Description
of the difficulties and hazards of connecting with a modem
on digital phone lines. Includes references to digital phone
line testers and digital phone converters that enable safe
modem use with digital phone systems. |
| Pulse
Noises / Tax Impulses |
| Brief
article on telephone/modem connectivity issues in countries
using pulse noises/tax impulses: Austria, Belgium, Czech
Republic, Germany, India, Spain, and Switzerland. Pulse
noise filter and tax impulse filter products referenced. |