WG3526 MC7455 Router losing internet connection. Modem connected.

[Labilis]

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.

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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.

[JimHelms]

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:

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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:

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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]

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.

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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://thewirelesshaven.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:

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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

[JimHelms]

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]

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

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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.

[JimHelms]

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.

[JimHelms]

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

[Labilis]

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.

[JimHelms]

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

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AT!LTEINFO

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AT!GSTATUS?

[JimHelms]

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 Wireless Joint 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.

[Labilis]

I thought about a new power adapter but when i had my kill-a-watt meter hooked up to the router it never drew more than 1 amp. Is there any amprage or wattages you suggest to look for? I was looking at this one previously https://www.amazon.com/dp/B073QTNF9F/re ... B00Z9X4GLW

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at!lteinfo
!LTEINFO: 
Serving:   EARFCN MCC MNC   TAC      CID Bd D U SNR PCI  RSRQ   RSRP   RSSI RXLV
            40978 310 120 11784 05D58832 41 5 5  17 106  -9.1  -93.4  -67.0 --

IntraFreq:                                          PCI  RSRQ   RSRP   RSSI RXLV
                                                    106  -9.1  -93.4  -67.0 --
                                                     54 -19.6 -105.2  -76.8 --

InterFreq: EARFCN ThresholdLow ThresholdHi Priority PCI  RSRQ   RSRP   RSSI RXLV

GSM:       ThreshL ThreshH Prio NCC ARFCN 1900 valid BSIC RSSI RXLV

WCDMA:     UARFCN ThreshL ThreshH Prio PSC   RSCP  ECN0 RXLV

CDMA 1x:   Chan BC Offset Phase Str

CDMA HRPD: Chan BC Offset Phase Str

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at!gstatus?
!GSTATUS: 
Current Time:  567		Temperature: 45
Reset Counter: 1		Mode:        ONLINE         
System mode:   LTE        	PS state:    Attached     
LTE band:      B41    		LTE bw:      20 MHz  
LTE Rx chan:   40978		LTE Tx chan: 40978
LTE CA state:  NOT ASSIGNED
EMM state:     Registered     	Normal Service 
RRC state:     RRC Connected  
IMS reg state: No Srv  		

PCC RxM RSSI:  -73		RSRP (dBm):  -99
PCC RxD RSSI:  -67		RSRP (dBm):  -93
Tx Power:      0		TAC:         2E08 (11784)
RSRQ (dB):     -6.8		Cell ID:     05D58832 (97880114)
SINR (dB):     13.4


OK

[JimHelms]

I think 5A is a little overkill. Also, be aware the 2.1mm and 2.5mm tips are used interchangeably by a lot of suppliers.


THESE are good quality adapters that we stock to replace the cheaper ones.

The carrier's signal strength is not the best but you should hold a connection. SINR looks good.

It also appears there are very few other towers in the direction your antennas are pointed.

I would try the adapter. That would be a cheap fix in the realm of things.

[Labilis]

I'll give it a try. Even if it doesn't help it will be better than the stock one that feels like a glorified AC to USB adapter.

Yea around here sprint has sparse tower placement. And its ONLY near interstates. So if you're not close to a major highway you're not getting service.

Thanks for all the help so far.

[Labilis]

Just a quick update. Swapped to an ATT prepaid sim to see if sprint was the problem and had the issue occur again.

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at!gstatus?
!GSTATUS: 
Current Time:  141		Temperature: 40
Reset Counter: 1		Mode:        ONLINE         
System mode:   LTE        	PS state:    Attached     
LTE band:      B12    		LTE bw:      10 MHz  
LTE Rx chan:   5110		LTE Tx chan: 23110
LTE CA state:  INACTIVE    		LTE Scell band:B2     
LTE Scell bw:20 MHz  		LTE Scell chan:700
EMM state:     Registered     	Normal Service 
RRC state:     RRC Connected  
IMS reg state: No Srv  		

PCC RxM RSSI:  -54		RSRP (dBm):  -84
PCC RxD RSSI:  -61		RSRP (dBm):  -92
SCC RxM RSSI:  -77		RSRP (dBm):  -105
SCC RxD RSSI:  -82		RSRP (dBm):  -108
Tx Power:      5		TAC:         6205 (25093)
RSRQ (dB):     -13.2		Cell ID:     07074B10 (117918480)
SINR (dB):      7.8


OK

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at!lteinfo
!LTEINFO: 
Serving:   EARFCN MCC MNC   TAC      CID Bd D U SNR PCI  RSRQ   RSRP   RSSI RXLV
             5110 310 410 25093 07074B10 12 3 3   8 176 -12.7  -84.2  -60.6 --

IntraFreq:                                          PCI  RSRQ   RSRP   RSSI RXLV
                                                    176 -12.7  -84.2  -60.6 --
                                                    400 -20.0  -93.1  -61.8 --

InterFreq: EARFCN ThresholdLow ThresholdHi Priority PCI  RSRQ   RSRP   RSSI RXLV
              700            0           0        0 176 -16.2 -103.8  -78.2   0
              700            0           0        0 398 -18.7 -105.4  -79.0   0
              700            0           0        0  29 -18.5 -107.5  -79.1   0

GSM:       ThreshL ThreshH Prio NCC ARFCN 1900 valid BSIC RSSI RXLV

WCDMA:     UARFCN ThreshL ThreshH Prio PSC   RSCP  ECN0 RXLV

CDMA 1x:   Chan BC Offset Phase Str

CDMA HRPD: Chan BC Offset Phase Str


OK

[DustinJones]

Did you find a fix for your issue? I just went down the same road you did and am experiencing the same issue. Thanks.