EM7411 WG3526 router troubleshooting needed

[vborstel]

Good Afternoon,
Looking for troubleshooting advise please.

I have (below) installed since May 2021. purchased from Wireless Joint
Sierra Wireless EM7411 CAT-7 LTE
WG3526-P 4G LTE WiFi PoE Router Dual Band (2.4GHz-5GHz) WiFi
(2) External directional Antennas

Worked very well up until last week. I was getting 15 mbs down consistently.
Today I am getting less than 2 mbs.
Troubleshooting steps I have performed:
Looked at antennas and connections, no damage, no movement, no moisture in connections.
I have reset modem and router to factory defaults and reconfigured.
unknowns: If something changed at T-Mobile tower.


This was recorded in May 2021
at!gstatus?
!GSTATUS:
Current Time: 1274 Temperature: 65
Reset Counter: 2 Mode: ONLINE
System mode: LTE PS state: Attached
LTE band: B2 LTE bw: 10 MHz
LTE Rx chan: 925 LTE Tx chan: 18925
LTE SCC1 state:ACTIVE LTE SCC1 band: B12
LTE SCC1 bw : 5 MHz LTE SCC1 chan: 5035
LTE SCC2 state:NOT ASSIGNED
LTE SCC3 state:NOT ASSIGNED
LTE SCC4 state:NOT ASSIGNED
EMM state: Registered Normal Service
RRC state: RRC Connected
IMS reg state: No Srv

PCC RxM RSSI: -85 PCC RxM RSRP: -104
PCC RxD RSSI: -85 PCC RxD RSRP: -113
SCC1 RxM RSSI: -76 SCC1 RxM RSRP: -101
SCC1 RxD RSSI: -76 SCC1 RxD RSRP: -101
Tx Power: 22 TAC: 77e8 (30696)
RSRQ (dB): -11.7 Cell ID: 0123010c (19071244)
SINR (dB): 12.8


This was recorded today:
OK
AT+RSCP?
+RSCP:
OK
AT!UMTSCHAN?
!UMTSCHAN: NOT IMPLEMENTED
OK
AT!LTEINFO?
!LTEINFO:
Serving: EARFCN MCC MNC TAC CID Bd D U SNR PCI RSRQ RSRP RSSI RXLV
68886 310 260 30696 0123333F 71 3 3 2 284 -15.8 -119.2 -86.1 --
IntraFreq: PCI RSRQ RSRP RSSI RXLV
284 -15.8 -119.2 -86.1 --
450 -16.1 -119.3 -94.7 --
InterFreq: EARFCN ThresholdLow ThresholdHi Priority PCI RSRQ RSRP RSSI RXLV
925 0 0 0 58 -16.8 -124.2 -98.5 0
5035 0 0 0 31 -10.4 -109.7 -90.7 0
8665 0 0 0 51 -13.9 -117.5 -99.4 0
WCDMA: UARFCN ThreshL ThreshH Prio PSC RSCP ECN0 RXLV
OK
AT!GSTATUS?
!GSTATUS:
Current Time: 149 Temperature: 56
Reset Counter: 9 Mode: ONLINE
System mode: LTE PS state: Attached
LTE band: B71 LTE bw: 10 MHz
LTE Rx chan: 0 LTE Tx chan: 133422
LTE SCC1 state:NOT ASSIGNED
LTE SCC2 state:NOT ASSIGNED
LTE SCC3 state:NOT ASSIGNED
LTE SCC4 state:NOT ASSIGNED
EMM state: Registered Normal Service
RRC state: RRC Connected
IMS reg state: No Srv
PCC RxM RSSI: -87 PCC RxM RSRP: -119
PCC RxD RSSI: -85 PCC RxD RSRP: -119
Tx Power: -- TAC: 77e8 (30696)
RSRQ (dB): -15.8 Cell ID: 0123333f (19084095)
SINR (dB): 3.6
OK
AT!PCTEMP?
Temp state: Normal
Temperature: 57.00 C
OK

Mon Nov 8 14:19:38 2021 : /dev/ttyUSB2 AT+CPMS="SM"
+CPMS: 30,30,30,30,30,30
OK

Mon Nov 8 14:19:59 2021 : /dev/ttyUSB2 AT+CPMS="SM"
+CPMS: 30,30,30,30,30,30
OK


Thank you in advance
Michael

[toddw]

Band 12 can often be saturated, so I typically avoid it. I see it is on 71 but that db looks high for 71. I would be trying these band combinations, in this order....

71, 2, 4, 66
2,4,66
2,4, 12, 66

Being T-mobile, you can also try sprint...

25, 26 and 41

It can be trial and error when finding the right combo when a particular band is saturated.

Also depends on the band implementation on your tower and how wide they are. Good luck.

[Didneywhorl]

Different bands. You were getting CA B2 and B12, the new one shows B71 only. Could be tower changes. Definitely using different bands than before.

Your signal to noise ratio is also terrible now.