The message “Facility Not Supported for SMs” typically means that a short message (SMS) operation you’re attempting to perform is not supported by the mobile switching center (MSC) or service provider’s SMS handling system.
Here’s a detailed breakdown:
Meaning
In telecom signaling (e.g., MAP or SMPP), this error often corresponds to a “facility not supported” response, which indicates that a specific feature or parameter used in the message request is not recognized or supported by the network element that received it.
For SMS (Short Message Service), this means the network doesn’t support the facility or service type requested for the subscriber or destination.
⚙️ Common Causes
Unsupported Feature Request
Attempting to use a feature like delivery receipts, concatenated messages, or port addressing that isn’t supported by the network.
Incorrect Service Type
Sending a message type or parameter combination (e.g., “MT-FSM” with an unsupported facility) not accepted by the serving MSC.
Network Configuration Issue
The SMSC or HLR is configured to disallow a certain service for that subscriber or route.
Subscriber Limitation
The destination subscriber’s profile doesn’t support SMS (e.g., data-only SIM or barred SMS service).
Roaming Context
The subscriber is roaming on a network that doesn’t support certain SMS features.