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gen555
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Posts: 2
Joined: Sun Feb 14, 2021 9:26 pm

SXT LTE6 loses link

Fri Feb 19, 2021 6:04 pm

Hi!
I've bought SXT LTE6 kit, set it up the same way as another one at my another place (no issues there for a half a year at all yet - turn on and forgot ), but with my new one there are a lot of LTE link loss issues. Especially at evenings and in nights.
I've noticed: the fist sign of problem is dissappearing of RSSI in interface info:
    pin-status: ok
  registration-status: registered
        functionality: full
         manufacturer: "MikroTik"
                model: "R11e-LTE6"
             revision: R11e-LTE6_V026
     current-operator: 25011
                  lac: 9011
       current-cellid: 198473729
               enb-id: 775288
            sector-id: 1
           phy-cellid: 276
    access-technology: LTE (CA2)
       session-uptime: 8m43s
                 imei: 356662100306072
                 imsi: 250110104447856
                 uicc: 8971100001044478569
         primary-band: B7@20Mhz earfcn: 2850 phy-cellid: 276
              ca-band: B7@20Mhz earfcn: 3048 phy-cellid: 276
                 rsrp: -68dBm
                 rsrq: -10.5dB
                 sinr: 23dB
                  cqi: 12
                   ri: 2
Just after modem reset ("AT+RESET") RSSI is shown (-50 - -60dB), but then it disappears shortly. After RSSI disappeared LTE interface loses link in a while and modem often is in status "not searching". After deactivation/activation of interface link goes up.
I have issues mostly in evenings and at nights - I suppose it correlates with cell/channel load.
I'd switched back to my old router+USB LTE dongle to check everything is OK with signal/cell and have had no link loss for 3 days (according to session uptime data from usb stick).
Full log attached.
A piece of log when an issue appeared:
18:21:50 interface,info lte1 link up
18:21:50 interface,info lte1 detect UNKNOWN
18:21:56 interface,info lte1 detect WAN
18:24:53 lte,async,raw SXTR__LTE: lte1: +CEREG: 1,"2333","0bd47801",9
18:24:53 lte,async,raw SXTR__LTE: lte1: +CREG: 11,"2333","0bd47801",9
18:24:53 lte,async,raw SXTR__LTE: lte1: $CREG: 11,"2333","0bd47801",9,"114"
18:24:56 lte,async,raw SXTR__LTE: lte1: sent AT+CFUN?
18:24:56 lte,async,raw SXTR__LTE: lte1: rcvd +CFUN: 1
18:24:56 lte,async,raw SXTR__LTE: lte1: sent AT+COPS?
18:24:56 lte,async,raw SXTR__LTE: lte1: rcvd +COPS: 0,2,"25011",9
18:24:56 lte,async,raw SXTR__LTE: lte1: +CEREG: 1,"2333","0bd4780c",9
18:24:56 lte,async,raw SXTR__LTE: lte1: +CREG: 11,"2333","0bd4780c",9
18:24:56 lte,async,raw SXTR__LTE: lte1: $CREG: 11,"2333","0bd4780c",9,"114"
18:24:59 lte,async,raw SXTR__LTE: lte1: sent AT+CFUN?
18:24:59 lte,async,raw SXTR__LTE: lte1: rcvd +CFUN: 1
18:24:59 lte,async,raw SXTR__LTE: lte1: sent AT+COPS?
18:24:59 lte,async,raw SXTR__LTE: lte1: rcvd +COPS: 0,2,"25011",9
18:25:09 lte,async,raw SXTR__LTE: lte1: +CEREG: 1,"2333","0bd47801",9
18:25:09 lte,async,raw SXTR__LTE: lte1: +CREG: 11,"2333","0bd47801",9
18:25:09 lte,async,raw SXTR__LTE: lte1: $CREG: 11,"2333","0bd47801",9,"114"
18:25:11 lte,async,raw SXTR__LTE: lte1: sent AT+CFUN?
18:25:11 lte,async,raw SXTR__LTE: lte1: rcvd ERROR
18:25:11 lte,async,raw SXTR__LTE: lte1: sent AT+COPS?
18:25:11 lte,async,raw SXTR__LTE: lte1: rcvd ERROR
18:25:19 lte,async,raw SXTR__LTE: lte1: +CREG: 0
18:25:19 lte,async,raw SXTR__LTE: lte1: $CREG: 0
18:25:19 lte,async,event SXTR__LTE: lte1: ^MODE:3
18:25:19 lte,async,event SXTR__LTE: lte1: +MSRI: 1
18:25:19 lte,async,event SXTR__LTE: lte1: +MPBK: 0
18:25:19 lte,async,event SXTR__LTE: lte1: *SIMDETEC:2,NOS
18:25:19 lte,async,event SXTR__LTE: lte1: +MMSG: 0, 0
18:25:19 lte,async,raw SXTR__LTE: lte1: +CGREG: 0
18:25:19 lte,async,raw SXTR__LTE: lte1: +CEREG: 0
18:25:19 lte,info lte1: not registred, state: 0
18:25:19 lte,info SXTR__LTE: lte1: not registred, state: 0
18:25:19 lte,async,event SXTR__LTE: lte1: +CPAS: 5
18:25:20 lte,async,raw SXTR__LTE: lte1: sent AT+CFUN?
18:25:20 lte,async,raw SXTR__LTE: lte1: rcvd +CFUN: 4
18:25:20 lte,async,event SXTR__LTE: lte1: *SIMDETEC:1,SIM
18:25:20 lte,async,event SXTR__LTE: lte1: *ICCID: 8971100001044478569
18:25:20 lte,async,event SXTR__LTE: lte1: *EUICC: 1
18:25:21 lte,async,raw SXTR__LTE: lte1: +CREG: 0
18:25:21 lte,async,raw SXTR__LTE: lte1: $CREG: 0
18:25:21 lte,async,raw SXTR__LTE: lte1: +CGREG: 0
18:25:21 lte,async,raw SXTR__LTE: lte1: +CEREG: 0
18:25:21 lte,async,event SXTR__LTE: lte1: *RADIOPOWER: 0
18:25:21 lte,async,event SXTR__LTE: lte1: *ADMINDATA: 0, 2, 0
18:25:21 lte,async,event SXTR__LTE: lte1: +CPIN: READY
18:25:21 lte,async,event SXTR__LTE: lte1: *EUICC: 1
18:25:21 lte,async,event SXTR__LTE: lte1: *ECCLIST: 5, 0, 112, 0, 000, 0, 08, 0, 118, 0, 911
18:25:22 lte,async,event SXTR__LTE: lte1: +MMSG: 0, 0
18:25:22 lte,async,event SXTR__LTE: lte1: +MMSG: 0, 0
18:25:22 lte,async,event SXTR__LTE: lte1: +MMSG: 1, 0
18:25:22 lte,async,event SXTR__LTE: lte1: +MPBK: 1
18:26:15 dhcp,info LAN-dhcp deassigned 192.168.9.240 from 7C:49:EB:9D:A9:F0
18:26:15 dhcp,info LAN-dhcp assigned 192.168.9.240 to 7C:49:EB:9D:A9:F0
18:26:19 lte,error failed to register on network
18:26:19 lte,error SXTR__LTE: failed to register on network
18:26:19 lte,account SXTR__LTE: lte1 session: 269s 6825731/879069 bytes 10783/6149 packets
Versions:
modem: R11e-LTE6_V026
OS: 6.48.1
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SiB
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Posts: 1368
Joined: Sun Jan 06, 2013 11:19 pm
Location: Poland

Re: SXT LTE6 loses link

Wed Feb 24, 2021 9:41 pm

This "*SIMDETEC:2,NOS" means a SIM is Not Detected at slot 2.
You use a sim slot a or b ?
You can use "isopropyl alcohol" at sim card pins ?

And I know about one bug at lhgr who have 1xsim slot and RouterOS breake connection bcs he see missing sim at not exist slot 2... maybe this is the same bug.

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