Send Free Sms Online Definitionsource(google.com.pk)
Send Free SMS Text Messages Online
Posted on May 6, 2013 by naomihensonqe927
Short Message Service (SMS) is the general name for the technology which enables people to send and receive text messages via cellphones (or mobile phones).
The GSM digital mobile phone standard (popular in Europe, the Middle East, Asia, Africa and some parts of North America) state that: “Messages can be up to 160 characters of text in length”. CDMA networks allow greater message size and operate in North & South America, Asia (China, India, Japan, South Korea, New Zealand, Australia, Hong Kong, etc).
(In actual fact, most modern cellphones using the GSM standard send messages larger than 160 characters, but they do so by sending multiple messages of 160 characters. That means that when you send a message of 330 characters in length, you have actually sent two messages of 160 characters and one message of 10 characters.)
SMS messages can comprise of words, numbers or an alphanumeric combination; binary format is even supported.
Technically speaking, SMS is a store and forward service. This means that messages are not sent directly from sender to recipient, but always via an SMS center instead. You have a limited time to download or receive your messages (this happens automatically when you switch your cellphone on), otherwise the messages are removed from the SMS center concerned.
Message delivery (or failure) can be confirmed, too.
Note: this is a limited definition of sms. A fuller explanation can be found at
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