Signal & Syntax · Messaging and A2P
What Is an SMS Segment?
An SMS segment is one part of a message split across two or more SMS. Each segment is billed as one SMS and rejoined on the handset.An SMS segment is one part of a message split across two or more SMS. Each segment is billed as one SMS and rejoined on the handset.An SMS segment is one part of a message split across two or more SMS. Each segment is billed as one SMS and rejoined on the handset.
Also calledconcatenated SMS · multipart SMS · long SMS
Example
161 GSM-7 characters → 2 segments
SMS Segment in Practice
A user data header (UDH) in each segment tells the handset how to rejoin the parts. The header takes six bytes, which is why A user data header (UDH) in each segment tells the handset how to rejoin the parts. The header takes six bytes, which is why A user data header (UDH) in each segment tells the handset how to rejoin the parts. The header takes six bytes, which is why GSM-7GSM-7 drops from 160 to 153 per segment. drops from 160 to 153 per segment. drops from 160 to 153 per segment. UCS-2UCS-2 drops from 70 to 67. A 161-character GSM-7 message costs two segments. drops from 70 to 67. A 161-character GSM-7 message costs two segments. drops from 70 to 67. A 161-character GSM-7 message costs two segments.
Where ScoreMachine Fits
Related Terms
Read the Guide
Guide
GSM-7, UCS-2 and SMS Segments Explained
How one character changes the segment count. Read the guide →Run the Checks on Your Own List
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