SMPP Data Coding Scheme

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	Cyrillic	(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