First octet of the SMS-DELIVER PDU
The first octet of the SMS-DELIVER PDU has the following layout:
| Bit no | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
|---|---|---|---|---|---|---|---|---|
| Name | TP-RP | TP-UDHI | TP-SRI | (unused) | (unused) | TP-MMS | TP-MTI | TP-MTI |
where the fields have the following meaning:
| Name | Meaning |
|---|---|
| TP-RP | Reply path. Parameter indicating that reply path exists. |
| TP-UDHI | User data header indicator. This bit is set to 1 if the User Data field starts with a header |
| TP-SRI | Status report indication. This bit is set to 1 if a status report is going to be returned to the SME |
| TP-MMS | More messages to send. This bit is set to 0 if there are more messages to send |
| TP-MTI | Message type indicator. Bits no 1 and 0 are both set to 0 to indicate that this PDU is an SMS-DELIVER |
Example
A first octet of “04″ (hex) has the following meaning:
| Bit no | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
|---|---|---|---|---|---|---|---|---|
| Name | TP-RP | TP-UDHI | TP-SRI | (unused) | (unused) | TP-MMS | TP-MTI | TP-MTI |
| Value | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 0 |