ISU AT Command Reference

ISU AT Command ReferencePhase III AT Commands7.8 +CSQ - Signal Quality (Initial implementation; revised in Phase VI)Exec Command: +CSQExecution command returns the received signal strength indication from the ISU. Response is in theform:+CSQ: where is:0 Equivalent to 0 bars displayed on the ISU signal strength indicator.1 Equivalent to 1 bar displayed on the ISU signal strength indicator.2 Equivalent to 2 bars displayed on the ISU signal strength indicator.3 Equivalent to 3 bars displayed on the ISU signal strength indicator.4 Equivalent to 4 bars displayed on the ISU signal strength indicator.5 Equivalent to 5 bars displayed on the ISU signal strength indicator.Test Command: +CSQ=?List the supported signal strength indications. The response is in the form:+CSQ: (supported s)Note: A signal strength response may not be immediately available, but will usually be received withintwo seconds of issuing the command. If the ISU is in the process of acquiring the system or in a satellitehandoff, a delay in response of up to 10 seconds may be experienced.If the ISU has no SIM, is awaiting a SIM PIN entry, has an invalid SIM, or has otherwise not proceeded tosuccessful registration, the delay in response may exceed the 50 second timeout limit. Under suchcondition, an ERROR response will be received. To avoid a delayed response due to registration problems,issue the +CREG command to verify registration prior to entering the +CSQ command to obtain signalstrength.Version 2.6March 30, 2006 51