Specifications

Chapter 3 – Status Control Commands
Multi-Tech Systems, Inc. AT Commands for EDGE (E1) Modems (S000474A) 57
3.4 AT+CEER Extended Error Report
Description: AT+CEER returns an extended error report regarding the reason of the last
• call release
• failure to set up a call (both mobile originated or terminated)
• failure to modify a call by using Supplementary Services
• failed attempt to activate, register, query, deactivate or deregister a Supplementary
Service
• unsuccessful GPRS attach or unsuccessful PDP context activation
• GPRS detach or PDP context deactivation
The release cause report is presented in numeric format. Default output in case of a non-error-
situation is +CEER: 0,0,0. A description associated with each number can be found in the tables
given in the following subclauses and the relevant GSM specifications.
The first parameter <locationID> serves to locate the other two parameters. Depending on the
failure or release cause either <reason> or <ssRelease> are applicable; i.e., if <reason> ≠ 0,
then <ssRelease> = 0.
Vice versa, if <reason> = 0, then <ssRelease> may be ≠ 0.
In addition to AT+CEER, the command ATS18 can be used to check especially the status of data
calls.
Syntax: Exec. Command: AT+CEER
Responses: +CEER: <locationID>, <reason>, <ssRelease>
OK
ERROR
+CME ERROR: <err>
Test Command: AT+CEER=?
Responses: OK
ERROR
+CME ERROR: <err>
Parameters:
<locationID>
Location ID as number code. Location IDs are listed in Section 3.4.1, Cause Location ID
for the extended error report. Each ID is related with another table that contains a list of
<reason>s or <ssRelease>s.
<reason>
Reason for last call release as number code. The number codes are listed in several
tables, sorted by different categories in the following subclauses. The tables can be
found proceeding from the Location ID given in Section 3.4.1, Cause Location ID for the
extended error report.
<ssRelease>
Release cause for last Supplementary Service call (listed in Section 3.4.5, GSM
Release cause for Supplementary Service Call).
Examples:
Example 1
ATD”01751223344”; A mobile originated call is rejected by the remote party.
NO CARRIER Call setup is terminated with NO CARRIER.
AT+CEER To check the cause, the caller enters AT+CEER.
+CEER: 8,21,0 The Location ID 8 in Section 3.4.1 points to Section 3.4.4, where 21 =
OK “Call rejected”. 0 = “No error” refers to parameter <ssRelease> that is not
applicable.
Example 2
The user attempts to activate call barring, but uses the wrong password.
AT+clck=oi,1,”0000”,3;
+CME ERROR: incorrect password
AT+CEER
+CEER: 35,0,38 The Location ID 35 in Section 3.4.1 points to Section 3.4.9, where 38 =
OK “negative PW check” may mean that a wrong password was tried for the first
time. 0 = “No error” refers to parameter <reason> that is not applicable.