Terrible Throughput on ADSL (Resolved)

[richsoft]

I have just bought a 7800N to replace my aging Homehub 1, which has taken to needing a reboot everytime I do any heavy downloading/streaming.

However, although the 7800 syncs at 15,285 down, 828 up, the throughput is only approximately 1mb/s as shown by both speedtest.net and the BT test. Changing back to the Homehub, (sync is a tiny bit higher at 15,323/828), a speed test gives results of around 10mb/s at the moment, which is about right for peak time.

I have verified these figures a couple of times, and after reboots etc, and they are consistent.

Any ideas, why the throughput is so low on the 7800? At around 10 times slower than my Homehub, it doesn't seem to be a wise investment!

Some stats:

HomeHub:
Uptime: 0 days, 0:16:01
Modulation: G.992.5 annex A
Bandwidth (Up/Down) [kbps/kbps]: 828 / 15,323
Data Transferred (Sent/Received) [MB/MB]: 3.04 / 30.00
Output Power (Up/Down) [dBm]: 12.5 / 17.0
Line Attenuation (Up/Down) [dB]: 5.0 / 17.5
SN Margin (Up/Down) [dB]: 10.5 / 17.0
Vendor ID (Local/Remote): TMMB / TSTC
Loss of Framing (Local/Remote): 0 / 0
Loss of Signal (Local/Remote): 0 / 0
Loss of Power (Local/Remote): 0 / 0
Loss of Link (Remote): 0
Error Seconds (Local/Remote): 10 / 0
FEC Errors (Up/Down): 15,188 / 0
CRC Errors (Up/Down): 16,140 / 0
HEC Errors (Up/Down): 775 / 0
Line Profile: Fast

7800N
DSP Firmware Version A2pB025f.d22k
DMT Status No Defect
Operational Mode ADSL2+
Upstream 828
Downstream 15285
SNR Margin(Upstream) 9.2
SNR Margin(Downstream) 15.9
Line Attenuation(Upstream) 6.4
Line Attenuation(Downstream) 11.0

Thanks,

Richard

[richsoft]

I've done a little more investigation, and it appears to be a problem related to the switch between the PC and the 7800.

The switch is a Netgear GS608 (Gigabit), and removing this and linking the PC directly to the router give a sustained throughput of about 13.5mb/s at the moment!
Replacing the Netgear with an ancient 10/100 switch also allows the full speed...

Its a little weird, as the switch works fine with the Homehub, but of course that is only at 100mb not gigabit speeds... Time to rewire the network!

Thanks,

Richard