Greenspek Information Technology Solutions Ltd

Message length is dictated by the number of bytes of the message text. A single payload can only be 140 bytes. If a message text is longer than 140 bytes, then it becomes a concatenated or multi-part message. In a multi-part message, some of the allocated bytes from the payload are used to create a user data header (UDH). This provides identification and ordering information so that the receiving device knows how to order the separate payloads, which may arrive at the handset out of order into a single readable message. The UDH takes 6 bytes or 48 bits. This reduces the space for how many characters can be in each message part.

SMS primarily supports two character sets: GSM-7 and UCS-2/UTF-16*.

Although Campaign can send up to a maximum of 800 GSM characters or 400 UCS-2 characters in six parts, some markets might limit the maximum number of concatenated messages. Certain markets may have specific requirements or limitations. Check with the governing bodies of the market to obtain further information. Our system supports a maximum of 10 SMS lengths