WE826 \ MC7455 \ AT&T : Stopped Connecting

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GB.Fertig
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Joined: Fri Feb 07, 2020 7:59 pm

WE826 \ MC7455 \ AT&T : Stopped Connecting

Post by GB.Fertig » Fri Feb 07, 2020 8:06 pm

I got the WiFiX WE826 GO and build the router with the MC7455 Modem and everything seem to work great for a little under a month, I am now on day two of the device no longer connecting.

It seems to be reading the card fine still, as all of the Modem/SIM Info is populated. The sim was never removed from the router since it was first installed and working either. I seem to have a decent enough single with the tower. The time stamp on the router was off by a few weeks, and I re-synced and power cycled the modem a few times to finally get it reading the correct timestamp, but that didn't seem to fix the problem. Below is my gstatus any help would be greatly appreciated.

I am very new to the LTE modem world so I am slowly learning what to look for and what to check for.

Code: Select all

at!gstatus?
!GSTATUS: 
Current Time:  12757		Temperature: 30
Reset Counter: 1		Mode:        ONLINE         
System mode:   LTE        	PS state:    Not attached 
LTE band:      B2     		LTE bw:      15 MHz  
LTE Rx chan:   875		LTE Tx chan: 4294967295
LTE CA state:  NOT ASSIGNED
EMM state:     Deregistered   	Attach Needed  
RRC state:     RRC Idle       
IMS reg state: No Srv  		

PCC RxM RSSI:  -74		RSRP (dBm):  -101
PCC RxD RSSI:  -80		RSRP (dBm):  -107
Tx Power:      --		TAC:         1225 (4645)
RSRQ (dB):     -8.2		Cell ID:     011FFE09 (18873865)
SINR (dB):     13.8

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BillA
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Re: WE826 \ MC7455 \ AT&T : Stopped Connecting

Post by BillA » Sat Feb 08, 2020 1:04 am

GB.Fertig wrote:
Fri Feb 07, 2020 8:06 pm
I got the WiFiX WE826 GO and build the router with the MC7455 Modem and everything seem to work great for a little under a month, I am now on day two of the device no longer connecting.

The easiest way of troubleshooting this issue, is by inserting the sim card into a compatible phone, then try to make a test call and go online. If it doesn't work in a phone, then you'll have to sort out the service related issue with your carrier. As long as it works in a phone, continue on to the next step.

Based on the status, you have a pretty good signal but there's a problem with the "PS state: Not attached".
First, set the time, date, and time zone manually again (don't auto-sync it), unplug the router, wait 5 seconds, replug it, wait a couple of minutes, then pull another AT!GSTATUS? report. If it's still showing "PS state: Not attached", then carefully reenter your carrier's APN into the router, restart, and test again. When it's showing "PS state: Attached", you're good to go.

Who's your carrier?
Do you have a limited or unlimited data service?
Did you set the correct TTL value for your carrier?

GB.Fertig
Posts: 6
Joined: Fri Feb 07, 2020 7:59 pm

Re: WE826 \ MC7455 \ AT&T : Stopped Connecting

Post by GB.Fertig » Sat Feb 08, 2020 9:49 am

The carrier is AT&T and it an unlimited data plan.

I did try the sim in a phone and it wouldn't make calls or get data. So I thought maybe it was sim related and contacted my provider who said the sim was registered fine. Then after two days of not working it was working this morning:

Code: Select all

at!gstatus?
!GSTATUS: 
Current Time:  46699		Temperature: 43
Reset Counter: 1		Mode:        ONLINE         
System mode:   LTE        	PS state:    Attached     
LTE band:      B4     		LTE bw:      10 MHz  
LTE Rx chan:   2000		LTE Tx chan: 20000
LTE CA state:  NOT ASSIGNED
EMM state:     Registered     	Normal Service 
RRC state:     RRC Connected  
IMS reg state: No Srv  		

PCC RxM RSSI:  -87		RSRP (dBm):  -112
PCC RxD RSSI:  -84		RSRP (dBm):  -110
Tx Power:      22		TAC:         1225 (4645)
RSRQ (dB):     -7.8		Cell ID:     011FFE17 (18873879)
SINR (dB):     11.8


OK
I don't recall setting any TTL values anyplace when I did the setup, what should those be? I noticed that LTE bw: 10Mhz now that its working. Is that normal for that to change?

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BillA
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Re: WE826 \ MC7455 \ AT&T : Stopped Connecting

Post by BillA » Sat Feb 08, 2020 10:48 am

GB.Fertig wrote:
Sat Feb 08, 2020 9:49 am
The carrier is AT&T and it an unlimited data plan.

I did try the sim in a phone and it wouldn't make calls or get data. So I thought maybe it was sim related and contacted my provider who said the sim was registered fine. Then after two days of not working it was working this morning:

I don't recall setting any TTL values anyplace when I did the setup, what should those be? I noticed that LTE bw: 10Mhz now that its working. Is that normal for that to change?

The TTL should be normally set to 65 on ATT/Tmobile, and 117 on Verizon/Visible, not sure about Sprint.
It's perfectly normal for the bands and bandwidth to change as the modem is constantly scanning for the best channel, that is when it's set to auto-scan, which is usually recommended. You can also create a list of just a few bands, so that the modem will only seek out those few bands and use it for CA whenever the tower allows it. You may also set the list to a single band, essentially forcing the modem to always lock onto that one band only (normally not recommended, but sometimes used for testing purposes).

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