cancel
Showing results for 
Search instead for 
Did you mean: 
Shahzad_Ismail
Community Manager
Community Manager

According to the GSM specification, a standard SMS message can contain up to 140 bytes of data (payload). Standard Latin (ISO-8859-1) character encoding represents a single character using 1 byte, which is 8 bits. Therefore, the maximum number of Latin 1 characters that could be included in an SMS is 140. GSM encoding represents characters using 7 bits instead of 8. This therefore provides a maximum of 160 characters per SMS. (140 * 8 bits) / 7 bits = 160 This effectively halves the number of characters the GSM character set can support, compared to ISO-8859-1. In order to include common characters that are usually represented using the 8th bit, these characters as well as other symbol characters must be re-mapped to a combination of lower bits. These re-mapped characters are often referred to as special characters. This re-mapping, in combination with packing 7-bit characters into 8-bit bytes is called GSM encoding.

Was this article helpful? Yes No
No ratings
Version history
Last update:
‎06-03-2021 09:38 AM
Updated by: