41110590
Rev 6.1
January 28, 2019
30
Product Technical Specification and
User Guide
Communicating with the GL7x00
For more information about AT commands applicable to the GL7500, please refer to document [3]
AirPrime HL7588 AT Commands Interface Guide; for more information about AT commands
applicable to the GL7600, refer to the commands marked as supported by HL7692 in document [4]
AirPrime HL76xx AT Commands Interface Guide.
4.3.
Verify the Received Signal Strength
The GL7x00 establishes a call only if the received signal is sufficiently strong. To verify the received
signal strength, do the following:
•
Using a communication software such as HyperTerminal, enter the AT command
AT+CSQ
.
The response returned has the following format:
+CSQ: <rssi>,<ber>
with:
<rssi>
= received signal strength indication
<ber>
= channel bit error rate
•
Verify the
<rssi>
value returned using the table below.
Table 19.
Received Signal Strength Values
Value of Received Signal Strength Indication
(<rssi>)
Interpretation of the Received Signal Strength
0 – 10
Insufficient*
11 – 31
Sufficient*
32 – 98
Not defined
99
No measure available
*
Based on general observations.
For more information about AT commands applicable to the GL7500, please refer to document [3]
AirPrime HL7588 AT Commands Interface Guide; for more information about AT commands
applicable to the GL7600, refer to the commands marked as supported by HL7692 in document [4]
AirPrime HL76xx AT Commands Interface Guide.
4.4.
Verify the Network Registration
To verify the GL7x00’s network registration, ensure that a valid SIM card has been inserted into the
GL7x00 SIM card holder and do the following:
•
Using a communication software such as HyperTerminal, enter the following AT commands:
AT+CPIN=”xxxx”
(to enter PIN code xxxx)
AT+CREG?
(to ascertain the registration status)
AT+CEREG?
AT+CGREG?
The response returned has the following format:
+CREG: <mode>,<stat>
where:
<mode>
= unsolicited registration message configuration
<stat>
= registration state
•
Verify the state of registration according to the returned values given in the table below.
