After getting the speed upgrade a few days ago, my upload also seems to be hitting a wall at 3.7Mb. I don't have a Superhub though. Here are my modem stats if anyone wants to have a look:
Code:
able Modem Downstream
DS-1 DS-2 DS-3 DS-4
Frequency 299000000 307000000 315000000 N/A
Lock Status
(QAM Lock/FEC Sync/MPEG Lock) Y/Y/Y Y/Y/Y Y/Y/Y N/N/N
Channel Id 27 28 29 N/A
Modulation 256QAM 256QAM 256QAM N/A
Symbol Rate
(Msym/sec) 6.952 6.952 6.952 N/A
Interleave Depth I=12
J=17 I=12
J=17 I=12
J=17 N/A
Power Level
(dBmV) 16.99 16.78 17.35 N/A
RxMER
(dB) 38.61 38.26 38.61 N/A
Correctable
Codewords 1 3 6 N/A
Uncorrectable
Codewords 910 1037 960 N/A
Cable Modem Upstream
US-1 US-2 US-3 US-4
Channel Type 2.0 N/A N/A N/A
Channel ID 3 N/A N/A N/A
Frequency
(Hz) 35800000 N/A N/A N/A
Ranging Status Success N/A N/A N/A
Modulation 16QAM N/A N/A N/A
Symbol Rate
(KSym/sec) 5120 N/A N/A N/A
Mini-Slot Size 1 N/A N/A N/A
Power Level
(dBmV) 38.75 N/A N/A N/A
T1 Timeouts 0 0 0 0
T2 Timeouts 0 0 0 0
T3 Timeouts 0 0 0 0
T4 Timeouts 0 0 0 0
Cable Modem Upstream Burst
US-1
Req
Init Maint
Per Maint
Adv Short
Adv Long
Adv UGS
(1)
(3)
(4)
(9)
(10)
(11)
Modulation Type QPSK QPSK QPSK 16QAM 16QAM 16QAM
Differential Encoding OFF OFF OFF OFF OFF OFF
Preamble Length 38 384 384 64 64 64
Preamble Value Offset 396 6 6 396 396 396
FEC Error Correction (T) 0 5 5 4 9 9
FEC Codeword Information Bytes (k) 16 34 34 76 232 232
Maximum Burst Size 0 0 0 7 0 105
Guard Time Size 22 48 48 22 22 22
Last Codeword Length FIX FIX FIX SHORT SHORT SHORT
Scrambler on/off ON ON ON ON ON ON
Cable Modem Operation Configuration
General Configuration
Network Access : Allowed
Maximum Number of CPEs : 1
Baseline Privacy : Enabled
DOCSIS Mode : DOCSIS 3.0
Config File : dsfd;kfoA,.iyewrkldJ
Primary Downstream Service Flow
SFID : 8051
Max Traffic Rate : 53000000 bps
Max Traffic Burst : 3044 bytes
Min Traffic Rate : 0 bps
Primary Upstream Service Flow
SFID : 8050
Max Traffic Rate : 5140000 bps
Max Traffic Burst : 8160 bytes
Min Traffic Rate : 0 bps
Max Concatenated Burst : 8160 bytes
Scheduling Type : Best Effort
