Check the manual of your gsm modem or connected cell phone for that error. Probably it gives a clue.
From: users [mailto:users-boun...@kannel.org] On Behalf Of Elvire Yell Sent: donderdag 30 april 2015 17:34 To: users@kannel.org Subject: +CMS 321 Error. Hi everyone I install kannel 1.4.3 and my log file keeps saying AT+CMGR=14 OK Not deleted AT+CMGR=15 +CMS ERROR 321
