Print

Please login or register.
1 Hour 1 Day 1 Week 1 Month Forever
Login with username, password and session length

[ramstell]

My modem identifies the remote DSLAM as IFTN (Infineon). Are you likely to get better performance if your modem uses a chipset from the same manufacture?

[roseway]

Possibly, but I wouldn't bank on it. Routers which use Infineon chipsets are Netgear DGN1000 and DGN3500 (the latter definitely not recommended!).

[ramstell]

I'm currently using a ST546 (in half bridge mode) which I believe uses a Broadcom chipset. If matching the DSALM was worth it, I had noticed the Netgear DM111Pv2 uses a Infineon chipset, but I think I'll stick with ST546.

[Oranged]

That's certainly the case on O2's LLU connection.

Any router that doesn't have a Broadcom chip tends to sync lower than those routers that have it.

[Azzaka]

That's certainly the case on O2's LLU connection.

Any router that doesn't have a Broadcom chip tends to sync lower than those routers that have it.

Not in all cases. The AR7 by TI (now made by Infineon) will gain a higher sync speed on longer lines than the Broadcom chips.

[HPsauce]

That's certainly the case on O2's LLU connection.

O2 (and Be) use extensions of the INP process that are only supported (I thinkl) by modern Broadcom-based routers, which explains why.

[Azzaka]

I am sure the Infineon supports INP and some Broadcoms dont support it. It all modem based.

You will find that some Broadcom based modems will become intermittent on the 2+ lines. If th9is happens swap it for an Infineon based modem and it should become stable.

[renluop]

I am sure the Infineon supports INP Infineon based modem .

For my education, what is INP amd what modems/modem routers use Infineon?

[HPsauce]

Impulse Noise Protection.
My understanding was that Broadcom have enabled additional settings/extensions beyong those "commonly" used and that these were implemented by Be/O2 in their exchange equipment and routers.

As for other chipsets and firmware also supporting these extensions I personally have no information.
I do know that Netgear DG834(g)v4 and GT definitely DO support this.

[waltergmw]

If you look at the pictures here :--

http://forum.kitz.co.uk/index.php/topic,8246.0.html

you'll see INP is actually listed within the diagnostic data for the 2Wire 2700HGV, but is always zero on a capped speed line.

Kind regards,
Walter

[orainsear]

I am sure the Infineon supports INP and some Broadcoms dont support it. It all modem based.

The newer Infineon chips, such as the Danube used in the Draytek Vigor 2820 series, definitely do support INP.

[HPsauce]

Just out of interest, independently of this thread and following another Be customer, I've been "experimenting" with INP settings on my line (Be with DG834GT).
Changing from the default of 2 to 1 has decreased my interleaving level from 160 to 96 and increased my sync speed (and downloads) by about 9%.
Stability seems OK so far, though SFerrors are up and are now almost 2% of the overall SF figure. Not sure if that's significant or not.

(I used to run without interleaving but a new source of interference caused unpredictable line "hangs" that interleaving cured; I'm just trying to see what level works best for me.)

[Azzaka]

Impulse Noise Protection can be explained as Extended Ethernet Frames. The size of the packet is similar to a UDP packet, however it is still a TCP packet. This allows for more data to be transfered, allowing a faster connection, yet the TCP part of the packet allows for header information such as error correction.

This in turn allows the line to sit stably with vewry little difference in speed. Of course, like interleaving, when the higher INP is enabled and used, the bigger the header and the smaller the transfer of data. This will then slow the line right down.

[ramstell]

My modem identifies the remote DSLAM as IFTN (Infineon). If I connect using a ST546 (Broadcom) I sync about 3000k with a downstream SN Margin of 18 dB. If I connect using a DM111Pv2 (Infineon) I sync at the same rate, but with a downstream SN Margin of 8 dB or so. Why is there such a huge difference in reported SN Margin?

[Azzaka]

Not sure of the full answer for that, however I could make a suggestion the DM111 is not capable of using INP or the line is capped. Also I know for certian the 546 is not 2+ compatible.