WG3526 MC7455 Router losing internet connection. Modem connected.

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Labilis
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Joined: Fri Nov 23, 2018 8:11 am

WG3526 MC7455 Router losing internet connection. Modem connected.

Post by Labilis » Sun Feb 03, 2019 1:09 am

I'm been running into an issue lately where I will lose mt internet connection on sprint. The router will lose connection to the internet. However via the web gui it still shows the modem as present but not connected. issues a at!gstatus? will show that the modem is still connected to the tower.

Code: Select all

at!gstatus?
!GSTATUS: 
Current Time:  17278		Temperature: 43
Reset Counter: 4		Mode:        ONLINE         
System mode:   LTE        	PS state:    Attached     
LTE band:      B25    		LTE bw:      5 MHz   
LTE Rx chan:   8315		LTE Tx chan: 26315
LTE CA state:  NOT ASSIGNED
EMM state:     Registered     	Normal Service 
RRC state:     RRC Connected  
IMS reg state: No Srv  		

PCC RxM RSSI:  -71		RSRP (dBm):  -93
PCC RxD RSSI:  -72		RSRP (dBm):  -97
Tx Power:      0		TAC:         2E06 (11782)
RSRQ (dB):     -9.7		Cell ID:     05C1380A (96548874)
SINR (dB):      7.6


OK

The remedy can very from telling the router to reconnect to the modem in the misc tab. to restarting the wan interface. Sometimes however a full reboot is needed after which it will take the router ~5 to 10 minutes to reestablish the connection.
The router firmware is GoldenOrb_2019-01-13. However I have had the issue with the 2017 and 2018 firmwares as well.
Using QIM or MBIM modes has not seen any changes. I've also tried experimenting with various MTU values with no luck. I've also tried disabling the wifi radios.

I am able to maintain the connection when using an m.2 to usb enclosure connected directly to my PC.

Any direction at this point would be greatly appreciated.

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JimHelms
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Re: WG3526 MC7455 Router losing internet connection. Modem connected.

Post by JimHelms » Sun Feb 03, 2019 8:56 am

Are you using the EM7544 or the MC7455? You mention a M.2 adapter which would imply a EM7455.

When did your issues start? Sprint is constantly doing tower software and hardware upgrades and there is a possibility it is carrier related. Just for the sake of testing, you may take your router to a different location and test on a different Sprint tower.

I would recommend never connecting a modem to the internet behind Windows that is intended for a router build.

I would also make sure the modem is running the latest Generic firmware.

If the modem has been connected to the internet behind Windows, I would first reset the modem to OEM status. It is probably a good idea to do it anyway:

Code: Select all

at!entercnd="A710"
AT!RMARESET=1
at!reset

Wait a few minutes, then hard reboot the router. When the router boots and is up and running, I would issue these commands (assuming the APN is r.ispsn):

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at!entercnd="A710"
at+cgdcont=1,"ipv4v6","r.ispsn"
at+cgdcont=3,"ipv4v6","otasn"
at!selrat=06
at!reset
Once again, hard reboot the router.

Also, others are claiming that plans using the r.ispsn will accept the n.ispsn APN, and that it is more stable. I have not tested this claim. But it would not hurt to test it if all else fails:

Code: Select all

at!entercnd="A710"
at+cgdcont=1,"ipv4v6","n.ispsn"
at+cgdcont=3,"ipv4v6","otasn"
at!selrat=06
at!reset
Hard reboot the router once again.

Labilis
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Joined: Fri Nov 23, 2018 8:11 am

Re: WG3526 MC7455 Router losing internet connection. Modem connected.

Post by Labilis » Sun Feb 03, 2019 3:44 pm

Sorry about that is is m-pcie not m.2

I did RMA reset the modem before after using it in the router. However after the reset at!impref? shows the old firmware version again.

Code: Select all

at!IMPREF?
!IMPREF: 
 preferred fw version:    02.24.05.06
 preferred carrier name:  GENERIC
 preferred config name:   GENERIC_002.026_000
 current fw version:      02.24.05.06
 current carrier name:    GENERIC
 current config name:     GENERIC_002.026_000

OK
I have attempted to setup airvantage in the past to update the firmware but wasn't able to get their service to discover the modem.

I went ahead and reran the APN commands and will keep an eye on it. Last time i did a full reset it lasted about 24 hours before going back to disconnecting frequently.

As to moving the router I'm using these fixed directional antenna's https://ltefix.com/shop/antennas/700-27 ... l-antenna/ so moving it isn't really an option. They're pointed at the only tower that would keep me above 60% signal strength.

I will let you know if anything changes this time around.

As for the n.ispsn I tested it as well. I was able to get to get a signal but the router was never ever to establish an internet connection with it.
n.ispsn stats:

Code: Select all

at!gstatus?
!GSTATUS: 
Current Time:  2536		Temperature: 41
Reset Counter: 1		Mode:        ONLINE         
System mode:   LTE        	PS state:    Not attached 
LTE band:      B41    		LTE bw:      20 MHz  
LTE Rx chan:   40978		LTE Tx chan: 40978
LTE CA state:  NOT ASSIGNED
EMM state:     Deregistered   	Attaching      
RRC state:     RRC Idle       
IMS reg state: No Srv  		

PCC RxM RSSI:  -70		RSRP (dBm):  -99
PCC RxD RSSI:  -65		RSRP (dBm):  -93
Tx Power:      0		TAC:         2E08 (11784)
RSRQ (dB):     -8.5		Cell ID:     05D58832 (97880114)
SINR (dB):     20.0
This is the enclosure that i was using when I had the modem connected directly to the windows box.
https://www.amazon.com/gp/product/B01JG ... UTF8&psc=1

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JimHelms
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Re: WG3526 MC7455 Router losing internet connection. Modem connected.

Post by JimHelms » Sun Feb 03, 2019 4:50 pm

It does not like the n.ispsn and has you de-registered from the network.

I would also disable connection manager until you get it straightened out.

Labilis
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Re: WG3526 MC7455 Router losing internet connection. Modem connected.

Post by Labilis » Tue Feb 05, 2019 2:02 am

Just had a disconnect. I did an at!gstatus? Before reconnecting and noticed it was deregistered.

Code: Select all

at!gstatus?
!GSTATUS: 
Current Time:  2658		Temperature: 47
Reset Counter: 1		Mode:        ONLINE         
System mode:   LTE        	PS state:    Not attached 
LTE band:      B2     		LTE bw:      20 MHz  
LTE Rx chan:   700		LTE Tx chan: 4294967295
LTE CA state:  NOT ASSIGNED
EMM state:     Deregistered   	Limited Service
RRC state:     RRC Idle       
IMS reg state: No Srv  		

PCC RxM RSSI:  -55		RSRP (dBm):  -83
PCC RxD RSSI:  -57		RSRP (dBm):  -99
Tx Power:      0		TAC:         6205 (25093)
RSRQ (dB):     -9.6		Cell ID:     07074B09 (117918473)
SINR (dB):     10.4


OK
Could it be a sim issue? It's a Calyx sim card.

Also i noticed i didn't give a time frame. Sorry about that. It's been going on for about 3 weeks since I've been trying to set this up. No issues with the Franklin R910 before that but far enough away from any towers that little thing pulls in 1-2mbps at the best of times.

Edit: I see its showing strange bands as well when it loses connection. B2 and B30 another time.
Edit2: I've attached the system log.
Attachments
syslog.txt
(14.82 KiB) Downloaded 80 times

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JimHelms
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Re: WG3526 MC7455 Router losing internet connection. Modem connected.

Post by JimHelms » Tue Feb 05, 2019 7:37 am

Yeah, not sure why it is trying to connect to Band 2 unless it is unable to make a good connection with Sprint and attempting to roam on another carrier's network.

Are you using the TTL setttings. If so, do not use them with the Sprint plan you have.

On the MODEM > NETWORK STATUS page, is it displaying the SIM card info and number?

Also, put the SIM Card back in the hotspot and update the user profile and any other updates that you can find.

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JimHelms
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Re: WG3526 MC7455 Router losing internet connection. Modem connected.

Post by JimHelms » Tue Feb 05, 2019 7:43 am

And, just to be straight, you have followed every step in this TUTORIAL in the order they are presented?

Labilis
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Joined: Fri Nov 23, 2018 8:11 am

Re: WG3526 MC7455 Router losing internet connection. Modem connected.

Post by Labilis » Tue Feb 05, 2019 8:00 am

JimHelms wrote:
Tue Feb 05, 2019 7:43 am
And, just to be straight, you have followed every step in this TUTORIAL in the order they are presented?
Yes I have. Starting over and completely resetting everything will fix things for 24-48 hours before it goes back to disconnecting once an hour or so.

The sim info is displaying properly. I will try swapping the sim the sim back and updating.

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JimHelms
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Re: WG3526 MC7455 Router losing internet connection. Modem connected.

Post by JimHelms » Tue Feb 05, 2019 8:25 am

Once that is done, and while it is connected to the network, run and post the following commands:

Code: Select all

AT!LTEINFO

Code: Select all

AT!GSTATUS?

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JimHelms
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Re: WG3526 MC7455 Router losing internet connection. Modem connected.

Post by JimHelms » Tue Feb 05, 2019 8:52 am

You know, one more thing you might try is swapping out the 12VDC power adapter. The adapter that comes with these units, in my opinion, are far from being the best quality made adapters.

Make sure it is a 2.1 mm tip and not a 2.5 mm. They look similar but are different. The 2.1 mm is a common tip for routers and other equipment.

The reason I suggest this is from a recent post on the LTE HACKS FACEBOOK group:
Riddle me this. I have 2 sprint accounts, one through Calyx (r.ispsn APN) and one of the free for a year direct from Sprint (n.ispsn APN). Both installed on MC7455 cards, running OpenWRT with Modemmanager, one on a WE826, the other on a WG3526. They connect to the exact same tower on Band 25. The direct Sprint acccount connection is rock solid, the Calyx account connection goes up and down like the homecoming queen on prom night. Signals on both are excellent.

Any thoughts?

UPDATE:

It was the power supply. I swapped in a new one as my problems went away. Something to be aware of, the Sierra cards need clean power and plenty of it.

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