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SMS Status Report

If a status report is received, the message will hold two numbers separated by a comma.

The first number is the message reference number. The second number is the message status code.

Acknowledgement when sending an SMS messages is an essential aspect in many systems. If the message has been successfully received, the value of the status code returned will be zero. Any error will result in the status code > 0, and the list below shows the different types of errors.

For example, if an SMS message is sent from the PD 664 to a cell phone that is switched off, the message may contain the string  “25,48” (Reference Number, Status Code). A short while after the phone is switched on, the PD 664 will receive a new SMS Status Report from the Service Centre, which will be the string “25,0”. The reference number indicates to which SMS the status report relates.

Status Code

Report: Response from either the network or the recipient following a Short Message being sent, from either a service centre or a mobile station. A report may be a delivery report that confirms the delivery of the short message to the recipient, or it may be a failure report that informs the originator that the short message was never delivered and the reason why.

Short message (SM): Information that may be conveyed by means of the Short Message Service.

Service Centre (SC): Function responsible for the relaying and store-and-forwarding of a short message between an SME and an MS.

Mobile station (MS):

Short Message Entity (SME): An entity which may send or receive Short Messages. The SME may be located in a fixed network, an MS, or an SC.

Status Code (decimal)
0	Short message received by the SME.
1	Short message forwarded by the SC to the SME but the SC is unable to confirm delivery
2	Short message replaced by the SC
3-15	Reserved
16-31	Values specific to each SC
Temporary error, SC still trying to transfer SM
32	Congestion
33	SME busy
34	No response from SME
35	Service rejected
36	Quality of service not available
37	Error in SME
38-47	Reserved
48-63	Values specific to each SC
Permanent error, SC is not making any more transfer attempts
64	Remote procedure error
65	Incompatible destination
66	Connection rejected by SME
67	Not obtainable
68	Quality of service not available
69	No interworking available
70	SM Validity Period Expired
71	SM Deleted by originating SME
72	SM Deleted by SC Administration
73	SM does not exist. (The SM may have previously existed in the SC but the SC no longer has knowledge of it or the SM may never have previously existed in the SC)
74-79	Reserved
80-95	Values specific to each SC
Permanent error, SC is not making any more transfer attempts
96	Congestion
97	SME busy
98	No response from SME
99	Service rejected
100	Quality of service not available
101	Error in SME
102-105	Reserved
106-111	Reserved
112-127	Values specific to each SC
128-255	Reserved

More information can be found in the GSM Technical specification.