The +CDS command notifies of an unsolicited delivery status in Protocol Data Unit (PDU) mode. v1.0.xv1.1.xv1.2.xv1.3.x
Terminal Equipment (TE) is expected to ACK received delivery report with the +CNMA command.
The notification is subscribed using the +CNMI command.
Syntax:
+CDS: <length><CR><LF><pdu>- +CMS ERROR code
- 524 – Manufacturer-specific cause: SMS client has been unregistered.
The notification parameters and their defined values are the following:
- <length>
- ASCII, 1–3 characters. Number of hexadecimal octets in <pdu>.
- <pdu>
- Hexadecimal numbers containing two International Reference Alphabet (IRA) characters per octet.
The following example returns a delivery status notification with the recipient address, service center timestamp, and message delivery time:
+CDS: 25<CR><LF>060C91534810325476171160316255001711603152120000
OK