Why is there an SMS 160 limit?

Short Message Service (SMS) is a system that people can send brief text messages between mobile phones. In the English alphabet, these messages are limited to 160 characters, including spaces. This restriction is the result of the system on which the SMS operates. Instead of using the primary telephone communication system, the SMS channel designed to send small packets of information between mobile phones and cellular towers. The limit of SMS 160 characters is simply the result of the originally modest use on which the channel was inserted. The channel was selected as the basis for SMS because the system could be easily implemented, with a minimum need for new infrastructure.

Mobile phones are supported by a network of tower responsible for call transmission. These towers are constantly communicating with mobile phones that support the frequency called the control channel. The control channel is used to transfer information about the location of phones and towers; Call orchestration is also used. Unlike the calls themselves these processesThey only require small information exchanges. When mobile phone providers have decided to set up a short message transmission system, this channel was easy to use. Everything necessary was the addition of a short service center for receiving messages and their routing to the relevant towers at a suitable time.

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system was designed by the organization called Global System for Mobile Communications (GSM), which is chaired by Friedhelm Hillebrand. GSM informally analyzed the types of messages that people send each other, and concluded that people would consider the service service useful, even though it is transmitted only between 100 and 200 characters. Limited hardware to a limit of 140 bytes or 1120 bits, proposed a system that could encode a small number of characters with 7 bits. This brought maximum port of 160 characters.

other factors can reduce the limit. Users can send longer messages by clarifying the SMS packet group. IfHowever, MIT of these individual packets is reduced to 153, because each must also contain metadata describing its relationship to other components of a larger message. SMS users who want to communicate with other alphabets are also limited to fewer characters. Chinese, Arabic and Cyrillic SMS use UTF-16 coding, which requires 16 bits per character and therefore has a SMS limit of 70 characters per message. Sending Seened messages using UTF-16 coding reduces this limit of SMS to 67 characters.

The limit of SMS 160 characters has become known and many different organizations suggest ways to communicate within this restriction. The popular Twitter message service is set to match this limit. Twitter allows users to publish a maximum of 140 characters, while the remaining space is biased by user names. Many Outlets and Politicians release short messages ready to transfer via Twitter or sent directly to subscribers' mobile phones. New services provide different ways, jaTo send more information between mobile phones, but the SMS limit of 160 characters remains ubiquitous.