Example; Checking Network Registration - Multitech QuickCarrier MTD-H5 User Manual

BASIC OPERATIONS
+CSQ: <rssi>,<ber>
Where:
<rssi>
0
1
2-30
31
99
<ber>
0
1
2
3
4
5
6
7
99
Note: Signal strength of 10 or higher is needed for successful packet data sessions.

Example

A example response to AT+CSQ:
+CSQ: 15,1

Checking Network Registration

Before establishing a packet data connection, verify the is device registered on the network. To do this enter the
network registration report read command:
AT+CREG?
If the device returns:
+CREG: 0,1
20
Received signal strength indication.
(-113) dBm or less
(-111) dBm
(-109) dBm - (-53) dBm / 2 dBm per step
(-51) dBm or greater
Not known or not detectable
Bit error rate, in percent
Less than 0.2%
0.2% to 0.4%
0.4% to 0.8%
0.8% to 1.6%
1.6% to 3.2%
3.2% to 6.4%
6.4% to 12.8%
More than 12.8%
Not known or not detectable
TM
QuickCarrier USB-D MTD-H5 User Guide