Sender address of the incoming SMS text message, which is the basis for the subsequent action. For example, 7277 for Deutsche Telekom.
- SNMP ID:
 - 2.83.11.4
 - Console path:
 - Setup > SMS > Action-Table
 - Possible values:
 Max. 16 characters from [A-Z][a-z][0-9]#@{|}~!$%&'()+-,/:;<=>?[\]^_.`
- Default:
 - empty