On EG915EU, if ppp0 is running from one port ex. /dev/ttyUSB2 then I am not able to run AT commands on any other USB port ex. /dev/ttyUSB3. Logs are attached in description

[2023-10-18 11:49:55.445] root@400001020:~# systemctl start ppd.servicepp pppd.service
[2023-10-18 11:50:10.761]
[2023-10-18 11:50:11.208] root@400001020:~# [56654.881734] pppd_command[21340]: pppd options in effect:
[2023-10-18 11:50:11.613]
[2023-10-18 11:50:11.613] [56654.883171] pppd_command[21340]: debug # (from /etc/ppp/peers/quectel-ppp)
[2023-10-18 11:50:11.613]
[2023-10-18 11:50:11.613] [56654.884281] pppd_command[21340]: nodetach # (from /etc/ppp/peers/quectel-ppp)
[2023-10-18 11:50:11.613]
[2023-10-18 11:50:11.613] [56654.885219] pppd_command[21340]: dump # (from /etc/ppp/peers/quectel-ppp)
[2023-10-18 11:50:11.613]
[2023-10-18 11:50:11.613] [56654.886243] pppd_command[21340]: noauth # (from /etc/ppp/peers/quectel-ppp)
[2023-10-18 11:50:11.613]
[2023-10-18 11:50:11.613] [56654.887164] pppd_command[21340]: user $LTE_USERNAME # (from /etc/ppp/peers/quectel-ppp)
[2023-10-18 11:50:11.613]
[2023-10-18 11:50:11.613] [56654.898534] pppd_command[21340]: password ??? # (from /etc/ppp/peers/quectel-ppp)
[2023-10-18 11:50:11.613]
[2023-10-18 11:50:11.613] [56654.899771] pppd_command[21340]: remotename 3gppp # (from /etc/ppp/peers/quectel-ppp)
[2023-10-18 11:50:11.613]
[2023-10-18 11:50:11.613] [56654.903599] pppd_command[21340]: /dev/ttyUSB2 # (from /etc/ppp/peers/quectel-ppp)
[2023-10-18 11:50:11.613]
[2023-10-18 11:50:11.613] [56654.904706] pppd_command[21340]: 115200 # (from /etc/ppp/peers/quectel-ppp)
[2023-10-18 11:50:11.613]
[2023-10-18 11:50:11.613] [56654.905668] pppd_command[21340]: lock # (from /etc/ppp/peers/quectel-ppp)
[2023-10-18 11:50:11.613]
[2023-10-18 11:50:11.613] [56654.906599] pppd_command[21340]: connect /usr/sbin/chat -E -s -v -f /etc/ppp/peers/quectel-chat-connect # (from /etc/ppp/peers/quectel-ppp)
[2023-10-18 11:50:11.622]
[2023-10-18 11:50:11.622] [56654.907557] pppd_command[21340]: disconnect /usr/sbin/chat -E -s -v -f /etc/ppp/peers/quectel-chat-disconnect # (from /etc/ppp/peers/quectel-ppp)
[2023-10-18 11:50:11.622]
[2023-10-18 11:50:11.622] [56654.916786] pppd_command[21340]: crtscts # (from /etc/ppp/peers/quectel-ppp)
[2023-10-18 11:50:11.622]
[2023-10-18 11:50:11.622] [56654.918218] pppd_command[21340]: local # (from /etc/ppp/peers/quectel-ppp)
[2023-10-18 11:50:11.622]
[2023-10-18 11:50:11.622] [56654.919281] pppd_command[21340]: hide-password # (from /etc/ppp/peers/quectel-ppp)
[2023-10-18 11:50:11.622]
[2023-10-18 11:50:11.622] [56654.928787] pppd_command[21340]: novj # (from /etc/ppp/peers/quectel-ppp)
[2023-10-18 11:50:11.622]
[2023-10-18 11:50:11.622] [56654.930429] pppd_command[21340]: novjccomp # (from /etc/ppp/peers/quectel-ppp)
[2023-10-18 11:50:11.622]
[2023-10-18 11:50:11.622] [56654.931558] pppd_command[21340]: ipcp-accept-local # (from /etc/ppp/peers/quectel-ppp)
[2023-10-18 11:50:11.622]
[2023-10-18 11:50:11.622] [56654.932610] pppd_command[21340]: ipcp-accept-remote # (from /etc/ppp/peers/quectel-ppp)
[2023-10-18 11:50:11.622]
[2023-10-18 11:50:11.622] [56654.933557] pppd_command[21340]: ipparam 3gppp # (from /etc/ppp/peers/quectel-ppp)
[2023-10-18 11:50:11.622]
[2023-10-18 11:50:11.622] [56654.934474] pppd_command[21340]: noipdefault # (from /etc/ppp/peers/quectel-ppp)
[2023-10-18 11:50:11.622]
[2023-10-18 11:50:11.622] [56654.935377] pppd_command[21340]: defaultroute # (from /etc/ppp/peers/quectel-ppp)
[2023-10-18 11:50:11.628]
[2023-10-18 11:50:11.628] [56654.936399] pppd_command[21340]: usepeerdns # (from /etc/ppp/peers/quectel-ppp)
[2023-10-18 11:50:11.628]
[2023-10-18 11:50:11.628] [56654.937335] pppd_command[21340]: :10.0.0.10 # (from /etc/ppp/peers/quectel-ppp)
[2023-10-18 11:50:11.628]
[2023-10-18 11:50:11.628] [56654.938312] pppd_command[21340]: noccp # (from /etc/ppp/peers/quectel-ppp)
[2023-10-18 11:50:11.628]
[2023-10-18 11:50:11.628] [56655.013079] pppd_command[21344]: abort on (BUSY)
[2023-10-18 11:50:11.628]
[2023-10-18 11:50:11.628] [56655.014428] pppd_command[21344]: abort on (NO CARRIER)
[2023-10-18 11:50:11.628]
[2023-10-18 11:50:11.628] [56655.086867] pppd_command[21344]: abort on (NO DIALTONE)
[2023-10-18 11:50:11.628]
[2023-10-18 11:50:11.628] [56655.093760] pppd_command[21344]: abort on (ERROR)
[2023-10-18 11:50:11.628]
[2023-10-18 11:50:11.628] [56655.094942] pppd_command[21344]: abort on (NO ANSWER)
[2023-10-18 11:50:11.628]
[2023-10-18 11:50:11.628] [56655.095923] pppd_command[21344]: timeout set to 120 seconds
[2023-10-18 11:50:11.628]
[2023-10-18 11:50:11.628] [56655.096856] pppd_command[21344]: send (AT^M)
[2023-10-18 11:50:11.628]
[2023-10-18 11:50:11.641] [56655.161035] pppd_command[21344]: expect (OK)
[2023-10-18 11:50:11.658]
[2023-10-18 11:50:11.674] [56655.190564] pppd_command[21344]: AT^M^M
[2023-10-18 11:50:11.674]
[2023-10-18 11:50:11.691] [56655.206019] pppd_command[21344]: OK
[2023-10-18 11:50:11.691]
[2023-10-18 11:50:11.691] [56655.207322] pppd_command[21344]: – got it
[2023-10-18 11:50:11.713]
[2023-10-18 11:50:11.713] [56655.208388] pppd_command[21344]: send (ATE0^M)
[2023-10-18 11:50:11.713]
[2023-10-18 11:50:11.755] [56655.255103] pppd_command[21344]: expect (OK)
[2023-10-18 11:50:11.755]
[2023-10-18 11:50:11.755] [56655.256558] pppd_command[21344]: ^M
[2023-10-18 11:50:11.755]
[2023-10-18 11:50:11.771] [56655.286975] pppd_command[21344]: ATE0^M^M
[2023-10-18 11:50:11.771]
[2023-10-18 11:50:11.771] [56655.288428] pppd_command[21344]: OK
[2023-10-18 11:50:11.795]
[2023-10-18 11:50:11.795] [56655.296166] pppd_command[21344]: – got it
[2023-10-18 11:50:11.795]
[2023-10-18 11:50:11.795] [56655.311372] pppd_command[21344]: send (ATI^M)
[2023-10-18 11:50:11.815]
[2023-10-18 11:50:11.815] [56655.312796] pppd_command[21344]: expect (OK)
[2023-10-18 11:50:11.815]
[2023-10-18 11:50:11.815] [56655.313878] pppd_command[21344]: ^M
[2023-10-18 11:50:11.815]
[2023-10-18 11:50:11.832] [56655.346638] pppd_command[21344]: ^M
[2023-10-18 11:50:11.832]
[2023-10-18 11:50:11.870] [56655.360817] pppd_command[21344]: Quectel^M
[2023-10-18 11:50:11.870]
[2023-10-18 11:50:11.870] [56655.362199] pppd_command[21344]: EG915U^M
[2023-10-18 11:50:11.870]
[2023-10-18 11:50:11.870] [56655.363277] pppd_command[21344]: Revision: EG915UEUABR02A05M08^M
[2023-10-18 11:50:11.870]
[2023-10-18 11:50:11.870] [56655.364213] pppd_command[21344]: ^M
[2023-10-18 11:50:11.870]
[2023-10-18 11:50:11.870] [56655.365123] pppd_command[21344]: OK
[2023-10-18 11:50:11.870]
[2023-10-18 11:50:11.900] [56655.401126] pppd_command[21344]: – got it
[2023-10-18 11:50:11.900]
[2023-10-18 11:50:11.900] [56655.402512] pppd_command[21344]: send (AT+CSQ^M)
[2023-10-18 11:50:11.900]
[2023-10-18 11:50:11.964] [56655.443990] pppd_command[21344]: expect (OK)
[2023-10-18 11:50:11.964]
[2023-10-18 11:50:11.964] [56655.445431] pppd_command[21344]: ^M
[2023-10-18 11:50:11.964]
[2023-10-18 11:50:11.964] [56655.446523] pppd_command[21344]: ^M
[2023-10-18 11:50:11.964]
[2023-10-18 11:50:11.964] [56655.464771] pppd_command[21344]: +CSQ: 27,99^M
[2023-10-18 11:50:11.964]
[2023-10-18 11:50:11.964] [56655.466085] pppd_command[21344]: ^M
[2023-10-18 11:50:11.964]
[2023-10-18 11:50:11.964] [56655.467138] pppd_command[21344]: OK
[2023-10-18 11:50:11.988]
[2023-10-18 11:50:11.988] [56655.485531] pppd_command[21344]: – got it
[2023-10-18 11:50:11.988]
[2023-10-18 11:50:11.988] [56655.486675] pppd_command[21344]: send (AT+CPIN?^M)
[2023-10-18 11:50:11.988]
[2023-10-18 11:50:11.988] [56655.508541] pppd_command[21344]: expect (OK)
[2023-10-18 11:50:12.005]
[2023-10-18 11:50:12.021] [56655.509934] pppd_command[21344]: ^M
[2023-10-18 11:50:12.021]
[2023-10-18 11:50:12.277] [56655.793656] pppd_command[21344]: ^M
[2023-10-18 11:50:12.277]
[2023-10-18 11:50:12.277] [56655.796286] pppd_command[21344]: +CPIN: READY^M
[2023-10-18 11:50:12.407]
[2023-10-18 11:50:12.407] [56655.797269] pppd_command[21344]: ^M
[2023-10-18 11:50:12.407]
[2023-10-18 11:50:12.407] [56655.798105] pppd_command[21344]: OK
[2023-10-18 11:50:12.407]
[2023-10-18 11:50:12.407] [56655.798982] pppd_command[21344]: – got it
[2023-10-18 11:50:12.407]
[2023-10-18 11:50:12.407] [56655.799933] pppd_command[21344]: send (AT+COPS?^M)
[2023-10-18 11:50:12.407]
[2023-10-18 11:50:12.407] [56655.805994] pppd_command[21344]: expect (OK)
[2023-10-18 11:50:12.407]
[2023-10-18 11:50:12.407] [56655.806867] pppd_command[21344]: ^M
[2023-10-18 11:50:12.407]
[2023-10-18 11:50:12.407] [56655.807627] pppd_command[21344]: ^M
[2023-10-18 11:50:12.407]
[2023-10-18 11:50:12.407] [56655.808479] pppd_command[21344]: +COPS: 0,0,“IDEA”,7^M
[2023-10-18 11:50:12.407]
[2023-10-18 11:50:12.407] [56655.809341] pppd_command[21344]: ^M
[2023-10-18 11:50:12.407]
[2023-10-18 11:50:12.407] [56655.815395] pppd_command[21344]: OK
[2023-10-18 11:50:12.407]
[2023-10-18 11:50:12.407] [56655.816344] pppd_command[21344]: – got it
[2023-10-18 11:50:12.407]
[2023-10-18 11:50:12.407] [56655.817419] pppd_command[21344]: send (AT+CGREG?^M)
[2023-10-18 11:50:12.407]
[2023-10-18 11:50:12.407] [56655.818338] pppd_command[21344]: expect (OK)
[2023-10-18 11:50:12.407]
[2023-10-18 11:50:12.407] [56655.819119] pppd_command[21344]: ^M
[2023-10-18 11:50:12.407]
[2023-10-18 11:50:12.407] [56655.819952] pppd_command[21344]: ^M
[2023-10-18 11:50:12.407]
[2023-10-18 11:50:12.407] [56655.826674] pppd_command[21344]: +CGREG: 0,5^M
[2023-10-18 11:50:12.407]
[2023-10-18 11:50:12.407] [56655.827563] pppd_command[21344]: ^M
[2023-10-18 11:50:12.407]
[2023-10-18 11:50:12.407] [56655.828342] pppd_command[21344]: OK
[2023-10-18 11:50:12.407]
[2023-10-18 11:50:12.407] [56655.829107] pppd_command[21344]: – got it
[2023-10-18 11:50:12.407]
[2023-10-18 11:50:12.407] [56655.829875] pppd_command[21344]: send (ATZ^M)
[2023-10-18 11:50:12.407]
[2023-10-18 11:50:12.407] [56655.843605] pppd_command[21344]: expect (OK)
[2023-10-18 11:50:12.415]
[2023-10-18 11:50:12.415] [56655.844580] pppd_command[21344]: ^M
[2023-10-18 11:50:12.415]
[2023-10-18 11:50:12.415] [56655.845390] pppd_command[21344]: ^M
[2023-10-18 11:50:12.415]
[2023-10-18 11:50:12.415] [56655.860458] pppd_command[21344]: OK
[2023-10-18 11:50:12.415]
[2023-10-18 11:50:12.415] [56655.861765] pppd_command[21344]: – got it
[2023-10-18 11:50:12.415]
[2023-10-18 11:50:12.415] [56655.870850] pppd_command[21344]: send (AT+CGDCONT=1,“IP”,“eapn1.net”^M)
[2023-10-18 11:50:12.415]
[2023-10-18 11:50:12.576] [56656.089437] pppd_command[21344]: expect (OK)
[2023-10-18 11:50:12.576]
[2023-10-18 11:50:12.608] [56656.116657] pppd_command[21344]: ^M
[2023-10-18 11:50:12.608]
[2023-10-18 11:50:12.624] [56656.119059] pppd_command[21344]: AT+CGDCONT=1,“IP”,“eapn1.net”^M^M
[2023-10-18 11:50:12.651]
[2023-10-18 11:50:12.651] [56656.146473] pppd_command[21344]: OK
[2023-10-18 11:50:12.651]
[2023-10-18 11:50:12.651] [56656.147617] pppd_command[21344]: – got it
[2023-10-18 11:50:12.651]
[2023-10-18 11:50:12.651] [56656.148495] pppd_command[21344]: send (ATDT99#^M)
[2023-10-18 11:50:12.651]
[2023-10-18 11:50:12.698] [56656.212975] pppd_command[21344]: expect (CONNECT)
[2023-10-18 11:50:12.698]
[2023-10-18 11:50:12.745] [56656.257111] pppd_command[21344]: ^M
[2023-10-18 11:50:12.745]
[2023-10-18 11:50:12.793] [56656.286613] pppd_command[21344]: ATDT
99#^M^M
[2023-10-18 11:50:12.793]
[2023-10-18 11:50:12.793] [56656.293560] pppd_command[21344]: CONNECT
[2023-10-18 11:50:12.793]
[2023-10-18 11:50:12.793] [56656.294846] pppd_command[21344]: – got it
[2023-10-18 11:50:12.793]
[2023-10-18 11:50:12.810] [56656.319880] pppd_command[21340]: Script /usr/sbin/chat -E -s -v -f /etc/ppp/peers/quectel-chat-connect finished (pid 21344), status = 0x0
[2023-10-18 11:50:12.853]
[2023-10-18 11:50:12.853] [56656.334484] pppd_command[21340]: Serial connection established.
[2023-10-18 11:50:12.853]
[2023-10-18 11:50:12.853] [56656.335843] pppd_command[21340]: using channel 27
[2023-10-18 11:50:12.853]
[2023-10-18 11:50:12.853] [56656.336792] pppd_command[21340]: Using interface ppp0
[2023-10-18 11:50:12.853]
[2023-10-18 11:50:12.853] [56656.349408] pppd_command[21340]: Connect: ppp0 ↔ /dev/ttyUSB2
[2023-10-18 11:50:12.853]
[2023-10-18 11:50:13.858] [56657.270978] pppd_command[21340]: sent [LCP ConfReq id=0x1 <asyncmap 0x0> <magic 0x5cd4b198> ]
[2023-10-18 11:50:13.858]
[2023-10-18 11:50:13.858] [56657.281651] pppd_command[21340]: rcvd [LCP ConfReq id=0x1 <asyncmap 0x0> <magic 0x3d4cb9ad> ]
[2023-10-18 11:50:13.858]
[2023-10-18 11:50:13.858] [56657.302954] pppd_command[21340]: sent [LCP ConfAck id=0x1 <asyncmap 0x0> <magic 0x3d4cb9ad> ]
[2023-10-18 11:50:13.858]
[2023-10-18 11:50:13.858] [56657.304300] pppd_command[21340]: rcvd [LCP ConfAck id=0x1 <asyncmap 0x0> <magic 0x5cd4b198> ]
[2023-10-18 11:50:13.858]
[2023-10-18 11:50:13.858] [56657.305325] pppd_command[21340]: rcvd [CHAP Challenge id=0x1 , name = “lwIP”]
[2023-10-18 11:50:13.858]
[2023-10-18 11:50:13.858] [56657.306205] pppd_command[21340]: sent [CHAP Response id=0x1 <2f9c28552cee55aee53e39555ab758b4>, name = “$LTE_USERNAME”]
[2023-10-18 11:50:13.858]
[2023-10-18 11:50:13.858] [56657.307534] pppd_command[21340]: rcvd [CHAP Success id=0x1 " l\316\200"]
[2023-10-18 11:50:13.858]
[2023-10-18 11:50:13.858] [56657.308452] pppd_command[21340]: CHAP authentication succeeded: lM-NM-^@
[2023-10-18 11:50:13.858]
[2023-10-18 11:50:13.858] [56657.309305] pppd_command[21340]: CHAP authentication succeeded
[2023-10-18 11:50:13.858]
[2023-10-18 11:50:13.871] [56657.389035] pppd_command[21340]: sent [IPCP ConfReq id=0x1 <addr 0.0.0.0> <ms-dns1 0.0.0.0> <ms-dns2 0.0.0.0>]
[2023-10-18 11:50:13.963]
[2023-10-18 11:50:13.963] [56657.404177] pppd_command[21340]: rcvd [IPCP ConfReq id=0x1 <addr 192.168.0.1>]
[2023-10-18 11:50:13.963]
[2023-10-18 11:50:13.963] [56657.405432] pppd_command[21340]: sent [IPCP ConfAck id=0x1 <addr 192.168.0.1>]
[2023-10-18 11:50:13.963]
[2023-10-18 11:50:13.963] [56657.406421] pppd_command[21340]: rcvd [IPCP ConfRej id=0x1 <ms-dns2 0.0.0.0>]
[2023-10-18 11:50:13.963]
[2023-10-18 11:50:13.963] [56657.407520] pppd_command[21340]: sent [IPCP ConfReq id=0x2 <addr 0.0.0.0> <ms-dns1 0.0.0.0>]
[2023-10-18 11:50:13.963]
[2023-10-18 11:50:13.963] [56657.408423] pppd_command[21340]: rcvd [IPCP ConfNak id=0x2 <addr 100.107.31.99> <ms-dns1 10.4.0.240>]
[2023-10-18 11:50:13.963]
[2023-10-18 11:50:13.963] [56657.409285] pppd_command[21340]: sent [IPCP ConfReq id=0x3 <addr 100.107.31.99> <ms-dns1 10.4.0.240>]
[2023-10-18 11:50:13.963]
[2023-10-18 11:50:13.963] [56657.460937] pppd_command[21340]: rcvd [IPCP ConfAck id=0x3 <addr 100.107.31.99> <ms-dns1 10.4.0.240>]
[2023-10-18 11:50:13.963]
[2023-10-18 11:50:13.992] [56657.488182] pppd_command[21340]: not replacing default route to wlan0 [192.168.1.1]
[2023-10-18 11:50:13.992]
[2023-10-18 11:50:13.992] [56657.489343] pppd_command[21340]: local IP address 100.107.31.99
[2023-10-18 11:50:13.992]
[2023-10-18 11:50:14.030] [56657.520962] pppd_command[21340]: remote IP address 192.168.0.1
[2023-10-18 11:50:14.030]
[2023-10-18 11:50:14.030] [56657.522236] pppd_command[21340]: primary DNS address 10.4.0.240
[2023-10-18 11:50:14.030]
[2023-10-18 11:50:14.030] [56657.523250] pppd_command[21340]: Script /etc/ppp/ip-up started (pid 21384)
[2023-10-18 11:50:14.030]
[2023-10-18 11:50:14.422] [56657.922916] pppd_command[21340]: Script /etc/ppp/ip-up finished (pid 21384), status = 0x0
[2023-10-18 11:50:14.422]
[2023-10-18 11:50:32.371] ^C
[2023-10-18 11:50:32.387]
[2023-10-18 11:50:32.387] root@400001020:~#
[2023-10-18 11:50:33.585]
[2023-10-18 11:50:33.601] root@400001020:~# ifconfig
[2023-10-18 11:50:37.692]
[2023-10-18 11:50:37.754] lo Link encap:Local Loopback
[2023-10-18 11:50:37.889]
[2023-10-18 11:50:37.889] inet addr:127.0.0.1 Mask:255.0.0.0
[2023-10-18 11:50:37.889]
[2023-10-18 11:50:37.889] inet6 addr: ::1/128 Scope:Host
[2023-10-18 11:50:37.889]
[2023-10-18 11:50:37.889] UP LOOPBACK RUNNING MTU:65536 Metric:1
[2023-10-18 11:50:37.889]
[2023-10-18 11:50:37.889] RX packets:1463804 errors:0 dropped:0 overruns:0 frame:0
[2023-10-18 11:50:37.889]
[2023-10-18 11:50:37.889] TX packets:1463804 errors:0 dropped:0 overruns:0 carrier:0
[2023-10-18 11:50:37.889]
[2023-10-18 11:50:37.889] collisions:0 txqueuelen:1000
[2023-10-18 11:50:37.889]
[2023-10-18 11:50:37.889] RX bytes:73329916 (69.9 MiB) TX bytes:73329916 (69.9 MiB)
[2023-10-18 11:50:37.889]
[2023-10-18 11:50:37.889]
[2023-10-18 11:50:37.889]
[2023-10-18 11:50:37.889] ppp0 Link encap:Point-to-Point Protocol
[2023-10-18 11:50:37.889]
[2023-10-18 11:50:37.889] inet addr:100.107.31.99 P-t-P:192.168.0.1 Mask:255.255.255.255
[2023-10-18 11:50:37.889]
[2023-10-18 11:50:37.889] UP POINTOPOINT RUNNING NOARP MULTICAST MTU:1500 Metric:1
[2023-10-18 11:50:37.889]
[2023-10-18 11:50:37.889] RX packets:4 errors:0 dropped:0 overruns:0 frame:0
[2023-10-18 11:50:37.889]
[2023-10-18 11:50:37.889] TX packets:9 errors:0 dropped:0 overruns:0 carrier:0
[2023-10-18 11:50:37.889]
[2023-10-18 11:50:37.889] collisions:0 txqueuelen:3
[2023-10-18 11:50:37.889]
[2023-10-18 11:50:37.889] RX bytes:52 (52.0 B) TX bytes:327 (327.0 B)
[2023-10-18 11:50:37.889]
[2023-10-18 11:50:37.889]
[2023-10-18 11:50:37.889]
[2023-10-18 11:50:37.889] wlan0 Link encap:Ethernet HWaddr D0:17:69:85:17:47
[2023-10-18 11:50:37.889]
[2023-10-18 11:50:37.889] inet addr:192.168.1.109 Bcast:192.168.1.255 Mask:255.255.255.0
[2023-10-18 11:50:37.889]
[2023-10-18 11:50:37.889] inet6 addr: fe80::d217:69ff:fe85:1747/64 Scope:Link
[2023-10-18 11:50:37.895]
[2023-10-18 11:50:37.895] UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
[2023-10-18 11:50:37.895]
[2023-10-18 11:50:37.895] RX packets:71707 errors:0 dropped:0 overruns:0 frame:0
[2023-10-18 11:50:37.895]
[2023-10-18 11:50:37.895] TX packets:93561 errors:9 dropped:0 overruns:0 carrier:0
[2023-10-18 11:50:37.895]
[2023-10-18 11:50:37.895] collisions:0 txqueuelen:1000
[2023-10-18 11:50:37.895]
[2023-10-18 11:50:37.895] RX bytes:7326172 (6.9 MiB) TX bytes:11560683 (11.0 MiB)
[2023-10-18 11:50:37.895]
[2023-10-18 11:50:37.895]
[2023-10-18 11:50:37.895]
[2023-10-18 11:50:37.900] root@400001020:~# busybox microcom /dev/ttyUSB3
[2023-10-18 11:50:59.462]
[2023-10-18 11:51:38.700] root@400001020:~# busybox microcom /dev/ttyUSB3 2
[2023-10-18 11:51:45.425]
[2023-10-18 11:51:45.526] microcom: can’t create ‘/var/lock/LCK…ttyUSB2’: File exists
[2023-10-18 11:51:45.526]
[2023-10-18 11:51:45.526] root@400001020:~# rm /var/lock/LCK…ttyUSB2
[2023-10-18 11:52:08.030]
[2023-10-18 11:52:08.125] root@400001020:~# rm /var/lock/LCK…ttyUSB2
[2023-10-18 11:52:13.092] root~# busybox microcom /dev/ttyUSB2
[2023-10-18 11:52:14.944]
[2023-10-18 11:52:35.370] root~#

Hi @neenad
Is it okay to reopen a command window and enter the AT port?