Delivery status notification in PDU mode +CDS

The +CDS command notifies of an unsolicited delivery status in Protocol Data Unit (PDU) mode. v2.0.x

Terminal Equipment (TE) is expected to ACK received delivery report with the +CNMA command.

The notification is subscribed using the +CNMI command.


+CDS: <length><CR><LF><pdu>
524 – Manufacturer-specific cause: SMS client has been unregistered.

The notification parameters and their defined values are the following:

ASCII, 1–3 characters. Number of hexadecimal octets in <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