At+Csq Signal Quality - Multi-Tech MultiModem EDGE Reference Manual

3 Registration denied
• Authentication or registration fails after Location Update Reject due to one of the following:
Either the SIM or the MS or the ME are unable to log into any network. No further attempt is
made to reach or log into a network. User intervention is required. Emergency calls can be
made, if any network is available.
4 Unknown (not used)
5 Registered; roaming. The ME is registered at a foreign network (national or international network)
<lac>
Two byte location area code in hexadecimal format (e.g., "00C3" equals 193 in decimal).
<ci>
Two byte cell ID in hexadecimal format.
Note
After the "+CREG: 1" (or "+CREG: 5") URC and before the "^SSIM READY" URC it is not sure that outgoing and
incoming calls can be made and short message functions executed. Emergency calls are possible.
Outgoing and incoming calls are always possible AFTER having received the "+CREG: 1" (or "+CREG: 5") and
"^SSIM READY" URCs.
See also Section 20.1, Restricted access to SIM data after SIM PIN authentication.
Example:
AT+CREG=2
OK
AT+COPS=0
OK
+CREG: 2
+CREG: 1,"0145","291A"

8.6 AT+CSQ Signal Quality

Description:
Test Command Syntax:
Response:
Exec Command Syntax:
Response:
Parameter Descriptions:
<rssi>
0 -113 dBm or less
1 -111 dBm
2..30 -109... -53 dBm
31 -51 dBm or greater
99 not known or not detectable
<ber>
0..7 as RXQUAL values in the table in GSM 05.08 section 8.2.4.
99 not known or not detectable
After using network related commands such as AT+CCWA, AT+CCFC, AT+CLCK, users are advised to wait
Note:
3s before entering AT+CSQ. This is recommended to be sure that any network access required for the
preceding command has finished.
Multi-Tech Systems, Inc. AT Commands for EDGE Modems (S000371G)
∗ #2 ... IMSI unknown at HLR
∗ #3 ... Illegal MS
∗
#6 ... Illegal ME
Activates extended URC mode.
Forces ME to automatically search network operator.
URC reports that ME is currently searching.
URC reports that operator has been found.
The AT+CSQ execute command indicates the received signal strength <rssi> and the
channel bit error rate <ber>.
AT+CSQ=?
+CSQ: (list of supported<rssi>s), (list of supported<ber>s)
OK
AT+CSQ
+CSQ: <rssi>,<ber>
OK
Chapter 8 – Network Service Commands
105