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LSxShade
join:2004-07-10
Yakima, WA

LSxShade

Member

difference between modes

what's the diff between:

Multimode
T1.413
G.DMT
G.Lite

Will any of this change the performance in my speeds / latency?

And also is there a better QoS mode to use other then what's default (UBR)?

I did try to google some of this information and didn't seem to get a direct answer.

msj
Premium Member
join:2004-05-21
Fort Collins, CO

msj

Premium Member

Multimode basically says that you are OK with any of T1.413, G.DMT or G.Lite, so the DSLAM can choose whatever it prefers. If you choose one of the others then the DSLAM will refuse the connection if it doesn't support that mode.

T1.413 and G.DMT are very similar, and support up to the full ADSL speeds of 8M/1M. G.Lite tops out around 4M, at least with my experimentation. So, yes G.Lite shouldn't be used if your DSLAM supports the other protocols. I'd stick with Multimode, since the DSLAM should be configured to use the best mode that it is able to use.

The different modes won't affect latency. Turning off interleave will reduce latency by about 30 ms. But you can't control that from the modem, it is configured at the DSLAM, so the change has to be made by Qwest. There have been other long threads related to this topic.

There is no other QoS mode that would be better than UBR.

AthlGrond
Premium Member
join:2002-04-25
Aurora, CO

AthlGrond

Premium Member

Great answer msj See Profile I added your reply to the FAQ for future reference:

»US West/Qwest DSL »Which "mode" or modulation standard should I use?
LSxShade
join:2004-07-10
Yakima, WA

LSxShade

Member

thnx, very helpful.