Mofi 4500 V2 with the Sierra 7455 modem
ATT network
Tower - Band 2 (20MHZ), Band 4 (10MHZ), Band 12 (10MHZ), Band 30 (10MHZ) (according to band scanning on the mofi)
Generally get 45Mb/s down wireless and 65Mb/s down wired
My tower is ~0.5 miles line of sight from my house with a small treeline between, and I currently have no external antennas.
GSTATUS REPORT:
Code: Select all
AT!gstatus?
!GSTATUS:
Current Time: 159104 Temperature: 60
Reset Counter: 3 Mode: ONLINE
System mode: LTE PS state: Attached
LTE band: B2 LTE bw: 20 MHz
LTE Rx chan: 1100 LTE Tx chan: 19100
LTE CA state: INACTIVE LTE Scell band:B12
LTE Scell bw:10 MHz LTE Scell chan:5110
EMM state: Registered Normal Service
RRC state: RRC Connected
IMS reg state: No Srv
PCC RxM RSSI: -52 RSRP (dBm): -74
PCC RxD RSSI: -58 RSRP (dBm): -81
SCC RxM RSSI: -51 RSRP (dBm): -70
SCC RxD RSSI: -48 RSRP (dBm): -67
Tx Power: -- TAC: 650C (25868)
RSRQ (dB): -9.1 Cell ID: 053FED08 (88075528)
SINR (dB): 25.2
1.) During sustained download activity (i.e. downloading a 100GB game from Steam) it will cruise along at maximum speed for some stretch of time, then nosedive to zero for up to 30 seconds, then return to full speed. The pattern stays the same for the entirety of the downloading.
My reseller emphatically swears there is no throttling or deprioritization on the sim (corporate hotspot account).
Does deprioritization equal zero data transmission, or just significantly less? I figured it would just go from like 40Mb/s to like 3 until the tower is less taxed and my rate would increase again.
Is this typical for 4G home internet, or is there possibly something with my setup? Is this a known issue that happens with the Mofi, the sierra 7455, or ATT?
2.) I know the Sierra 7455 can only carrier aggregate two bands. I found a detailed table outlining carrier aggregation possibilities that 2,4,12 and 30 can be aggregated together (caution- very large webpage table- I filtered for B2 as that appears to be my primary band) https://www.sqimway.com/lte_ca_band.php the tower nearest me does bands 2,3, and 12. Band 30 comes from another tower. Does carrier aggregation occur between more than one tower, or just on a single tower?
Is it realistic that I would see a noticeable increase in speed if I went the route of a DIY setup with a modem capable of 4 band carrier aggregation (or 3 if CA isn't between multiple towers)? Given my issues in question 1 above, is Quectel any better for the modem choice?
Sorry for the long post, I tried to be as thorough as possible. I appreciate any help you can give.
Cheers.