Slow speed or low bandwidth is good for short text messages. Another important consideration is latency, or how long it takes to deliver a message. Paging systems can have delays of 30 seconds to several minutes. Some latency may be introduced by the underlying technology. Web pages or wml sites may introduce delays when they are under heavy usage.
Some technologies are almost everywhere.
Paging technologies are able to get a message to almost anywhere in the continental United States. First generation analog cellular telephony also provides national coverage with few dead areas . Cellular phones are currently being used with paging technology for field communications. Solutions of this nature are currently common and available with off the shelf technology, although integration to enterprize systems may present some challenges. This type of solution limits the amount of interaction that a user can have with the enterprise because the users are limited to responding with numeric entry from the phone s keypad.