PXS8 SMS PDU 7-bit and 8-bit ASCII | Telit Cinterion IoT Developer Community
July 29, 2019 - 8:38pm, 1715 views
I am using the PXS8 on a CDMA network. The module is configured for PDU ****. The *** character set is being used.
After an SMS message is sent to the PXS8, I am using the AT+CMGL command to display the PDU.
For MMS messages, each ASCII character is represented by eight bits. (For example, the character 'H' is represented as 01101000 in the PDU.)
However, when a regular SMS is sent, the PXS8 represents each ASCII character with seven bits. (So 'H' is 1101000.)
Is there any documentation available that explains why the PXS8 sometimes uses 7-bit formatting when displaying SMS PDUs?
Could you give somoe examples? I'm probably not aware of such a behaviour - as far as I know PDU messages are displayed in hexadecimal form not as bytes.
the format of the bearer data/user data depends on the teleservice identifier used.
Please have a look at the 3GPP2 C.S0015-C v1.0 specification available from http://www.3gpp2.org/ for details.