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Value added services


Date: 2015-10-07; view: 421.


Value added services are normally provided by means of peripheral units attached to the cellular network, or to the fixed network with which to cellular network interconnects. In some countries, the prevailing regulatory regime will influence what services may be offered and in what manner, however, the following are typical.

47.6.2.1 Messaging services

Voice messaging is commonly available in association with cellular networks. Used in conjunction with the call divert supplementary services, the messaging service can pick up calls when the user cannot, and the caller can leave a message for later retrieval by the user. Some services allow the user to be alerted to the receipt of messages by means of a radiopaging service, or in some cases by a ringback on the cellular network itself.

In addition to voice messaging, GSM networks will incorporate the 'Short Message Service' which effectively turns a GSM mobile into a two way alphanumeric pager with forced message delivery and message delivery confirmation.

47.6.2.2 1 nformation services

Voice information services are commonly available on fixed net­works, normally carrying some premium call charge. Some services (such as travel and weather information) are of particular value to a mobile user and some networks make these more readily accessible, for instance by using the mobile's current location to select the appropriate information for that area.

47.6.2.3 Private interconnect

A large user of cellular can often gain economies by leasing a direct connection between the cellular network and their company's pri­vate network, thus bypassing the PSTN. Call charges for such direct connections are tariffed by the cellular operator at a level substan­tially less than that for PSTN calls. An extra benefit of private interconnect are that calls can be delivered direct to extensions on a company's network without having to be handled by the switch­board operator, saving time and labour.


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