Hello!
I’m trying to get Huawei E3276 4G USB modem working with RB751U-2HnD (RouterOS 6.3, also tried with 6.2 and 5.24). This specific 4G modem is not listed as supported in the wiki, but unfortunately my mobile provider doesn’t have any supported 3G or 4G devices to offer, so I decided to try anyway.
Short summary - the RB751 seems to recognize the modem just fine, but I cannot get connected to the internet. I think the problem is caused by some wrong settings in my ppp-out1 interface configuration (I’ve contacted my mobile provider for suggestions), but I’d like to verify I’m not missing anything on the Mikrotik side, because this is my first experience with Mikrotik.
I followed these wiki pages:
http://wiki.mikrotik.com/wiki/Option_Globetrotter_HSDPA_USB_Modem
http://wiki.mikrotik.com/wiki/Huawei_EVDO
The port is detected correctly:
/port print
Flags: I - inactive
# NAME CHANNELS USED-BY BAUD-RATE
0 usb1 2 9600
Modem responds to AT commands:
/system serial-terminal usb1 channel=0
[Ctrl-A is the prefix key]
ATI
^RSSI:12
Manufacturer: huawei
Model: E3276
Revision: 21.192.03.01.07
IMEI: 863781013170312
+GCAP: +CGSM,+DS,+ES
OK
So I set up the ppp-out1 interface with following configuration:
/interface ppp-client print
Flags: X - disabled, R - running
0 name="ppp-out1" max-mtu=1500 max-mru=1500 mrru=disabled port=usb1
data-channel=0 info-channel=0 apn="internet.emt.ee" pin="" user=""
password="" profile=default phone="*99#" dial-command="ATDT"
modem-init="AT+CGDCONT=1,"IP","internet.emt.ee"" null-modem=no
dial-on-demand=no add-default-route=yes default-route-distance=1
use-peer-dns=yes keepalive-timeout=30 allow=pap,chap,mschap1,mschap2
The ‘apn’ and ‘phone’ settings are definitely correct. Modem-init is what I found on the web in many postings about using various Huawei modems (I also tried with empty modedm-init). I tried all possible combinations of data-channel and info-channel (4 combinations as my modem has 2 channels). I tried reducing max-mtu and max-mru to 512. PIN is empty because I disabled PIN verification in Windows’ Mobile Broadband software (and verified I can get connected without being prompted for PIN).
With above settings, I can successfully get info:
/interface ppp-client> info 0
modem-status: ready
pin-status: no password required
functionality: full
manufacturer: huawei
model: E3276
revision: 21.192.03.01.07
serial-number: 863781013170312
current-operator: EE EMT (cellid unknown)
access-technology: Evolved 3G (LTE)
signal-strengh: -89 dBm
frame-error-rate: n/a
But when I try to connect with /interface ppp-client enable 0, the result is as follows:
02:57:33 async,ppp,info ppp-out1: initializing...
02:57:33 system,info device changed by admin
02:57:33 async,ppp,info ppp-out1: reseting link...
02:57:34 async,ppp,info ppp-out1: initializing modem...
02:57:34 async,ppp,info ppp-out1: dialing out...
02:57:34 async,ppp,debug ppp-out1: LCP lowerup
02:57:34 async,ppp,debug ppp-out1: LCP open
02:57:34 async,ppp,debug,packet ppp-out1: sent LCP ConfReq id=0x1
02:57:34 async,ppp,debug,packet <magic 0x1bf6a005>
02:57:34 async,ppp,debug,packet <pcomp>
02:57:34 async,ppp,debug,packet <accomp>
02:57:35 async,ppp,debug ppp-out1: LCP timer
02:57:35 async,ppp,debug,packet ppp-out1: sent LCP ConfReq id=0x2
02:57:35 async,ppp,debug,packet <magic 0x1bf6a005>
02:57:35 async,ppp,debug,packet <pcomp>
02:57:35 async,ppp,debug,packet <accomp>
02:57:36 async,ppp,debug ppp-out1: LCP timer
02:57:36 async,ppp,debug,packet ppp-out1: sent LCP ConfReq id=0x3
02:57:36 async,ppp,debug,packet <magic 0x1bf6a005>
02:57:36 async,ppp,debug,packet <pcomp>
02:57:36 async,ppp,debug,packet <accomp>
02:57:39 async,ppp,debug ppp-out1: LCP timer
...
02:58:50 async,ppp,debug,packet ppp-out1: sent LCP ConfReq id=0xa
02:58:50 async,ppp,debug,packet <magic 0x1bf6a005>
02:58:50 async,ppp,debug,packet <pcomp>
02:58:50 async,ppp,debug,packet <accomp>
02:59:31 async,ppp,debug ppp-out1: LCP timer
02:59:31 async,ppp,debug ppp-out1: LCP timeout sending ConfReq
02:59:31 async,ppp,debug ppp-out1: LCP lowerdown
02:59:31 async,ppp,info ppp-out1: terminating...
02:59:31 async,ppp,debug ppp-out1: LCP lowerdown
02:59:31 async,ppp,debug ppp-out1: LCP down event in starting state
02:59:31 async,ppp,info ppp-out1: disconnected
Given the above, would you agree that the problem is in my ppp-out1 interface settings which I need to sort out with my mobile provider, or could it still be caused by incompatibility between my router and 4G modem or something I have missed in Mikrotik setup?
