Specifications
AT command set for XX Siemens mobile phones and modems   
_________________________________________________________________________________________ 
_________________________________________________________________________________________ 
Document No.:  A30880-A10-A001-XX-
D376 
Revision: Master R75     
Revision Date:  29. September, 2004     
  142 
17 Network failure 
22 Congestion 
48 – 63  Retry upon entry into new cell low – high 
95 Message semantically incorrect 
96 Mandatory information invalid 
97  Message type does not exist or is not implemented 
98  Message type incompatible with protocol state 
99  Information element does not exist or is not implemented 
100 Conditional error 
101  Message incompatible with protocol state 
111 Unspecified protocol error 
Table 5-8: Return values issued by AT+CEER for GPRS Layer 3 Mobility Management 
5.4.2  GSM return values issued by AT+CEER for Session Manager 
Value Meaning 
25  LLC or SNDCP failure 
26 Insufficient resources 
27  Missing or unknown APN 
28  PDP address or type unknown 
29  User authentication failed 
30  Activation rejected by GGSN 
31  Activation rejected for unspecified reason 
32  Service option not supported 
33  Requested service option not subscribed 
34  Service option temporarily out of order 
35 NSAPI already used 
36 Regular deactivation 
37  QoS not accepted 
38 Network failure 
39 Reactivation required 
81  Invalid transaction identifier value 
95 Message semantically incorrect 
96 Mandatory information invalid 
97  Message type does not exist or is not implemented 
98  Message type incompatible with protocol state 
99  Information element does not exist or is not implemented 
100  Conditional IE error 
101  Message incompatible with protocol state 
111 Unspecified protocol error 
Table 5-9: GMM return values issued by AT+CEER 
5.4.3  Internal values of Session Manager issued by AT+CEER 
Value Meaning 
3  T3380 timer expired 
4 DeactAct 
5 DeactActReject 










