Can't get higher than 256 kbps upstream

[dgcarter]

Here are my modem stats:

Cable Modem Information
Cable Modem : DOCSIS 1.0/1.1/2.0 Compliant
MAC Address : [Mod Edit -MAC address removed]
Serial Number : ***********
Boot Code Version : 1.1.2c
Software Version : 2.111.1002
Hardware Version : 1.9


Cable Modem Operation Configuration

Network Access : Allowed
Maximum Downstream Data Rate : 10240000
Maximum Upstream Data Rate : 1072000
Maximum Upstream Channel Burst : 8160
Maximum Number of CPEs : 1
Modem Capability : Concatenation Enabled, Fragametation Enabled, PHS Enabled


Cable Modem Upstream
Upstream Lock : Locked
Upstream Channel ID : 3
Upstream Frequency : 34000000 Hz
Upstream Modulation : QAM16
Upstream Symbol Rate : 2560 Ksym/sec
Upstream transmit Power Level : 36.5 dBmV
Upstream Mini-Slot Size : 2

Cable Modem Downstream
Downstream Lock : Locked
Downstream Channel Id : 7
Downstream Frequency : 339000000 Hz
Downstream Modulation : QAM256
Downstream Symbol Rate : 5360.537 Ksym/sec
Downstream Interleave Depth : taps32Increment4
Downstream Receive Power Level : 1.9 dBmV
Downstream SNR : 38.5 dB

Despite the upstream saying Maximum Upstream Data Rate : 1072000 , I can't get more than 256K on any speed test. n I've tried wired, wireless and plugged direct into the modem. Anyone got any ideas what the problem is?

[Mick Fisher]

AV can skew speed test results. Temporarily disable your AV and see if you see any improvement.