Modems allow computers to 'talk' to each other across the telecommunications network. Typical applications include Internet access, file sharing, remote access and other functions serviced by additional software such as PC based fax systems and voice-mail systems.

For most home users, the standard, dial-up modem is a relatively easy item to purchase. Once again, it is imperative to ensure that the modem is certified for use on the Etisalat   network. Most modems come complete with data compression capabilities and error correction facilities. Both of these features serve to reduce the time taken for communications, file up/downloads etc. The standard modem now operates at a speed of 56Kbps but it is rare that such modems will actually connect and transfer at this speed, even with simple compression algorithms. Connection speeds of 30K - 40K are more common (this is an inherent trait of the technology rather than an avoidable difficulty). These modems serve the home market well, providing suitable Internet; connection speeds for browsing and email.

Leased line modems are used to connect two locations on a permanently available leased circuit. Some leased line modems will automatically dial up another connection should the leased line fail. It is common for public ISDN services to provide backup to leased lines.

Most dial-up modems are supplied with a software bundle relevant to the type of modem purchased. The bundle typically includes fax software and telephone software (such as a hands free, PC telephone system). Other packages include voice-mail systems, bulletin board systems and even fax- back solutions.

One of the most interesting, recent editions to modem technology was the introduction of the new, international, V92 standard. Most modems currently support V90 standard. New modems will support V92 standard and some manufacturers provide free upgrades from V90 to V92 via Internet downloads. The principle differentiator between the two standards is that V92 is a development focused upon the needs of Internet users. It balances the available upload and download speeds so that users can, for example send larger emails, quicker (at the expense of slightly reduced download speeds). V92 also provides 'call waiting' support, allowing users to place their Internet session on hold, take an incoming voice call and then revert to the Internet session on completion of the call. Another very nice feature of V92 allows the modem to 'remember' the parameters of each connection, thus reducing the time spent by the modem 'negotiating' at the beginning of each session. This could result in substantial savings for Internet users, particularly users who log on regularly for short periods.

Modems are offered in many derivatives to serve different applications and often the same modem is available in different packages (e.g. plug-in PC cards, external modems with serial, parallel or USB connection and even PCMCIA cards for use in laptops). Once again, it is important to ensure that the modem fulfils your needs and that it offers the optimum connectivity type for your equipment (internal ISA or PCI slot, parallel, serial or USB connection or one or two PCMCIA slots).

At Emirates Telecom Lab we ensure that Modem equipment meet international standards  and are compatible with the Etisalat networks