https://community.sinch.com/t5/Glossary/GSM-encoding/ta-p/7554 <DIV class="lia-message-template-content-zone"> <P>According to the GSM specification, a standard&nbsp;<A href="https://www.sinch.com/products/apis/messaging/sms/" target="_blank">SMS message</A>&nbsp;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.</P> </DIV> Thu, 03 Jun 2021 16:38:56 GMT Shahzad_Ismail 2021-06-03T16:38:56Z https://community.sinch.com/t5/Glossary/GSM-encoding/ta-p/7554 <DIV class="lia-message-template-content-zone"> <P>According to the GSM specification, a standard&nbsp;<A href="https://www.sinch.com/products/apis/messaging/sms/" target="_blank">SMS message</A>&nbsp;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.</P> </DIV> Thu, 03 Jun 2021 16:38:56 GMT https://community.sinch.com/t5/Glossary/GSM-encoding/ta-p/7554 Shahzad_Ismail 2021-06-03T16:38:56Z