City-Wide NB-IoT Network Monitoring and Diagnosing

Table 1

AT commands of different NB modem vendors.

	Simcom7000c	ME 3616	BC 95
Turn on/off modem	AT+CFUN	AT+CFUN	AT+CFUN
Query signal strength	AT+CSQ	AT+CSQ	AT+CSQ
Network registration	AT+COPS	AT+COPS	AT+COPS
Network status	AT+CPSI	AT+CEREG	AT+CEREG
PDP activation	AT+CGATT	ATMCGDEFCONF	AT+CGATT
Setting APN	AT+CGNAPN	AT+EGACT	AT+EGACT
Ping remote address	AT+CIPPING	AT+PING	AT+NPING
Open UDP socket	AT+CIPSTART	AT+ESOCON	AT+NSOCR
Send UDP message	AT+CIPSEND	AT+ESOSEND	AT+NSOST