5-bit encoded messages

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SMS & MMS Technical Forum » NowSMS Support - SMS Issues (Product Support Only) » Archive through March 09, 2004 » 5-bit encoded messages « Previous || Next »
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Posted on Monday, March 08, 2004 - 08:08 pm:   

Is there anyway that I can send messsage encode 5-bit rather 7-bit to increase the message length of a single message. Its obvious that only limited number of characters will be available. But is it possible if so HOW??????
Bryce Norwood - NowSMS Support
Board Administrator
Username: Bryce

Post Number: 1983
Registered: 10-2002
Posted on Tuesday, March 09, 2004 - 12:16 pm:   

Why stop at 5-bit? If you use binary encoding, you could just send it out as a string of 1's and 0's, and you'd get 1120 bits instead of 140 bytes.

Sorry, I'm kidding a bit here. There is no 5-bit characeter set or encoding defined for SMS. (If a 5-bit character set did exist, it could only support 32 characters in the character set which would be very limiting.)

The GSM 7-bit character set is defined in the standards. As long as your message contains only characters in that character set, you can fit 160 characters in a single message.

If you use any characters outside of that character set, the message needs to be sent in Unicode format, which uses 16-bit characters, and can only fit 70 characters in a single message.

You can find a reference to the characters that are in the GSM 7-bit character set in the following discussion thread:


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