HLR GSM Error Codes
The following table lists the most common GSM error codes returned by the HLR Lookup Service, and their descriptions.| GSM Error Code | Error Description |
|---|---|
| 1 | Unknown Subscriber |
| 5 | Unidentified Subscriber |
| 6 | Absent Subscriber |
| a | Bearer Service Not Provisioned |
| b | Teleservice Not Provisioned |
| c | Illegal Equipment |
| d | Call Barred |
| 15 | Facility Not Supported |
| 1b | Absent Subscriber |
| 20 | Delivery Failure |
| 21 | Message Waiting List Full |
| 22 | System Failure |
| 23 | Data Missing |
| 24 | Unexpected Data Value |
| 90 | Unrecognised Component |
| 91 | Mistyped Component |
| 92 | Body Structured Component |
| a0 | Duplicate Invoke ID |
| a1 | Unrecognised Operation |
| a2 | Mistyped Parameter |
| a3 | Resource Limitation |
| a4 | Initiating Release |
| a5 | Unrecognised Linked ID |
| a6 | Linked Response Expected |
| a7 | Unexpected Linked Operation |
| b0 | Unrecognised Invoke ID |
| b1 | Return Result Expected |
| b2 | Mistyped Parameter |
| c0 | Unrecognised Invoke ID |
| c1 | Return Error Unexpected |
| c2 | Unrecognised Error |
| c3 | Unexpected Error |
| c4 | Mistyped Parameter |
| c8 | Unable To Decode Response |
| c9 | Provider Abort |
| ca | User Abort |
| cb | No Response |
| cc | Timeout PAB |
| ce | Rejected |
| 3e7 | Congestion |
