Hi, When I connect my MC7304 to my linux computer I see three new serial ports created: /dev/ttyUSB0 /dev/ttyUSB1 /dev/ttyUSB2 I’m able to send AT commands and start a PPP session using /dev/ttyUSB2 using settings: 115200 8N1 + Hardware Flow Control. What are the other ports for? If they are …

MC7304 Multiple serial ports

jyijyi June 10, 2025, 2:03pm 5

You need to upgrade firmware

Topic		Replies	Views
changing the AT port sierra MC7304 MC/EM Series	11	2590	June 7, 2017
MC7355 MC7304 MC7804 PPP and AT commands MC/EM Series	1	1760	January 20, 2014
MC8705: only one /dev/ttyUSB* responding MC/EM Series	4	1547	August 12, 2014
Using MC7304 for GSM and Cellular simultaneously MC/EM Series	1	835	June 5, 2017
MC 8705, Which USB port to use for pppd. Forum and Source related topics	1	1868	May 22, 2015