SMPP Data Coding Scheme
Industry specifications and standards
Data Coding Scheme Values
DCS values signify the Data Coding Scheme you have set to pass your messages to Messaggio. See the industry-universal list of DCS values below.
| Integer | Binary | Translation | Notes |
|---|---|---|---|
| 0 | 00000000 | SMSC Default Alphabet – ASCII for short and long code and to GSM for toll-free | |
| 1 | 00000001 | ASCII for short and long code, Latin 9 for toll-free | (ISO-8859-9) |
| 2 | 00000010 | Octet Unspecified | 8-bit binary |
| 3 | 00000011 | Latin 1 | (ISO-8859-1) |
| 4 | 00000100 | Octet Unspecified | 8-bit binary |
| 5 | 00000101 | JIS | (X 0208-1990) |
| 6 | 00000110 | Cyrllic | (ISO-8859-5) |
| 7 | 00000111 | Latin/Hebrew | (ISO-8859-8) |
| 8 | 00001000 | UCS2/UTF-16 | (ISO/IEC-10646) |
| 9 | 00001001 | Pictogram Encoding | |
| 10 | 00001010 | Music Codes | (ISO-2022-JP) |
| 13 | 00001101 | Extended Kanji JIS | (X 0212-1990) |
| 14 | 00001110 | Korean Graphic Character Set | (KS C 5601/KS X 1001) |
esm_class Parameter
The esm_class parameter is used to indicate special message attributes associated with SMS
Default Setting: 0x00.
- If an ESME encodes GSM User Data Header information in the short message user data, it must set the UDHI flag in the esm_class field.
- If the SMSC delivers a short message that contains GSM User Data Header information encoded in the short_message or message_payload parameter, it must set the UDHI flag in
the esm_class field. - For GSM networks, the concatenation related optional parameters (sar_msg_ref_num, sar_total_segments, sar_segment_seqnum) or port addressing related optional parameters (source_port, destination_port) cannot be used in conjunction with encoded User Data Header in the short_message (user data) field. This means that the above listed optional
parameters cannot be used if the User Data Header Indicator flag is set.
ESME -> SMSC PDU Encoding
esm_class is encoded as follows in the submit_sm, submit_multi and data_sm (ESME -> SMSC) PDUs:
| Dictation | Bits | 7 6 5 4 3 2 1 0 | Meaning |
|---|---|---|---|
| Messaging Mode | 1-0 | x x x x x x 0 0 | Default SMSC Mode (e.g. Store and Forward) |
| Messaging Mode | 1-0 | x x x x x x 0 1 | Datagram mode |
| Messaging Mode | 1-0 | x x x x x x 1 0 | Forward (i.e. Transaction) mode |
| Messaging Mode | 1-0 | x x x x x x 1 1 | Store and Forward mode (use to select Store and Forward mode if Default SMSC Mode is non Store and Forward) |
| Message Type | 5-2 | x x 0 0 0 0 x x | Default message Type (i.e. normal message) |
| Message Type | 5-2 | x x 0 0 1 0 x x | Short Message contains ESME Delivery Acknowledgement |
| Message Type | 5-2 | x x 0 1 0 0 x x | Short Message contains ESME Manual/User Acknowledgement |
| GSM Network Specific Features | 7-6 | 0 0 x x x x x x | No specific features selected |
| GSM Network Specific Features | 7-6 | 0 1 x x x x x x | UDHI Indicator (only relevant for MT short messages) |
| GSM Network Specific Features | 7-6 | 1 0 x x x x x x | Set Reply Path (only relevant for GSM network) |
| GSM Network Specific Features | 7-6 | 1 1 x x x x x x | Set UDHI and Reply Path (only relevant for GSM network) |
SMSC -> ESME PDU Encoding
The esm_class parameter is encoded as follows in a deliver_sm and data_sm (SMSC -> ESME) PDUs:
**Note:** All unlisted values for bits 5-2 and 7-6 are reserved.
| Dictation | Bits | 7 6 5 4 3 2 1 0 | Meaning |
|---|---|---|---|
| Messaging Mode | 1-0 | x x x x x x x x | not applicable – ignore bits 0 and 1 |
| Message Type | 5-2 | x x 0 0 0 0 x x | Default message Type (i.e. normal message) |
| Message Type | 5-2 | x x 0 0 0 1 x x | Short Message contains SMSC Delivery Receipt |
| Message Type | 5-2 | x x 0 0 1 0 x x | Short Message contains SME Delivery Acknowledgement |
| Message Type | 5-2 | x x 0 0 1 1 x x | reserved |
| Message Type | 5-2 | x x 0 1 0 0 x x | Short Message contains SME Manual/User Acknowledgement |
| Message Type | 5-2 | x x 0 1 0 1 x x | reserved |
| Message Type | 5-2 | x x 0 1 1 0 x x | Short Message contains Conversation Abort (Korean CDMA) |
| Message Type | 5-2 | x x 0 1 1 1 x x | reserved |
| Message Type | 5-2 | x x 1 0 0 0 x x | Short Message contains Intermediate Delivery Notification |
| GSM Network Specific Features | 7-6 | 0 0 x x x x x x | No specific features selected |
| GSM Network Specific Features | 7-6 | 0 1 x x x x x x | UDHI Indicator set |
| GSM Network Specific Features | 7-6 | 1 0 x x x x x x | Set Reply Path |
| GSM Network Specific Features | 7-6 | 1 1 x x x x x x | Set UDHI and Reply Path |