Translating U-Verse Speed

Errrr. I mean Mbps, not Gbps. But you probably already knew that.

-sw

That's the highest speed your modem can do and still maintain a resonable BER (bit error rate).

That's what the line is capable of doing, if you pay AT&T enough.

That's your signal to noise ratio. Bigger is better.

That's your signal loss between the AT&T DSLAM and your modem. Smaller is better.

That's line drive (tx) level in both directions. Smaller is better.

That's the most that AT&T will allow (rate cap).

Max user rate is best you could do as limited by hardware under perfect conditions. User rate is the best you can do considering line conditions and BER (bit error rate).

Speed tiers are for marketing. The number you see here are a tangled mess which includes IP-DSL overhead, retransmissions, lost packets, etc.

Yep. 8909 kbit/sec if your speed test had that level of resolution.

Thanks for the explanation. When I had regular AT&T DSL the rates in the modem config were as published for that speed tier.

So 13215 and 31920 are not supposed to translate into numbers proportionate to your actual speed tier?

Anyway - I'm not complaining. I'm paying $15/month for 8Kbps which is almost twice as much as I was getting for $51/month. Hopefully when that 12-month contract is up Google Fiber will be ready here.

-sw