Verifying The Strength Of Received Signal; Pin Code Status - Teleorigin RB600 User Manual

7.6 Verifying the signal strength
The RB600 terminal can establish a connection with a network if the received signal
strength is sufficiently strong.
To verify the signal strength and bit error rate, do the following:
Using software such as Hyperterminal enter AT+CSQ. This command displays the
received signal strength indication <rssi> and channel bit error rate <ber>. The modem
answers as follows:
+CSQ: <rssi>,<ber>
OK
<parameter>
<rssi> 0 through 31 - covers the range of -113 dbm (or less) to -51dbm (or greater)
<ber> Channel bit error rate (in percent)
0–7 RXQUAL values in the GSM 05.08 table
99 Unknown or not detectable
For further information about AT commands and their usage, refer to [1].

7.7 PIN code status

To check PIN code status enter AT+CPIN? Command.
The table below shows the most interesting responses of the modem:
Answer
+CPIN: SIM PIN
+CPIN: READY
For further information about AT commands and their usage, refer to [1].
18
PIN code has not been entered
PIN code has been entered correctly
Description
Description