SG-2100 dropping LAN connections with EM7305 Cellular WAN

why

I think CA is allocated by tower based on bands you allow on the client. I believe that if your modem is set to band group 09 (LTE ALL), then the tower cell should enable carrier aggregation based on other metrics that are dynamic and ISP dependent. (...... but would welcome being corrected if this is not correct).

with AT!GSTATUS? command I see that my LTE CA state is "NOT ASSIGNED" I also see a bunch of signal quality and power measurements which might be useful to share.

I suspect mine are worse that yours and would be interested to note what you see.

RSRP = -118 dBm [ (-44dBm = good) <=> (-140dBm=Bad)]
RSRQ = -14.5 dB [ (-3dB=good) <=> (-19.5dB=Bad)]
SINR = 2 dB

RSRP = average received power from ref signal
RSRQ = indication of received signal quality
SINR = Signal to Noise Ratio

Overall I have felt that I am on outer edge of cell coverage and it is reflected in signal metrics above (UL/DL speeds and link metrics leaning to "Bad" end of scale). Given your higher data rates from EM7305 tests, I would be interested to know what your power figures are when seeing performance similar to what you reported in thread above ( 21.5Mbps DL / 26.3Mbps UL).

If your wireless performance is much better than mine reported above, it hints that "maybe" there is some correlation between quality of wireless link and stability of SoC firmware controlling embedded switch. ..... yeah a stretch I know, but thats where I am at the moment as I cannot use SG2100 with an integrated modem like I bought it for.

Thoughts?

Is it worth trying to switch it out for a 3100 to test it?

stephenw10

I'm in London so signal strength is usually good. I've made no real effort to position it for better signal and it's surrounded by other firewalls etc. I see (last week):

!GSTATUS: 
Current Time:  1550848		Temperature: 44
Bootup Time:   0		Mode:        ONLINE         
System mode:   LTE        	PS state:    Attached     
LTE band:      B3     		LTE bw:      15 MHz  
LTE Rx chan:   1392		LTE Tx chan: 19392
EMM state:     Registered     	Normal Service 
RRC state:     RRC Connected  
IMS reg state: No Srv  		
RSSI (dBm):    -71		Tx Power:    0
RSRP (dBm):    -95		TAC:         048C (1164)
RSRQ (dB):     -7		Cell ID:     000E1F02 (925442)
SINR (dB):     14.2

That's the EM7305 in an SG-2100 with random antennas!

I don't see anything listing CA state.

Steve