NormanSI gave her time to steal my mind awayPremium,MVMReviews:
San Jose, CA
|reply to JV |
Re: Need Info and Advice - Considering Switching to AT&T U-verse
said by JV:The majority of U-verse is hybrid; probably no more "bastardized" than HFC.
So is this real fiber optic service or some bastardized hybrid that sucks, is it any good, and should I give it a try?
This would indicate service is likely from an RT, or VRAD. I believe the up speed depends upon the technology; 1 Mbps for ADSL2+, 1.5 Mbps for VDSL.
I just went back and looked, and there is no TV offered at my address, and the highest internet speed is the Max Plus 18 Mbps plan for $53/month + equipment fees.
Their legacy ADSL service uses an ATM circuit between the DSLAM and the aggregation router (first IP hop to the Internet) and PPPoE authentication. The ATM link incurs a 15% speed penalty for encapsulation, and the PPPoE adds another layer of encapsulation requiring an MTU setting of 1492 to avoid packet fragmentation.
Their U-verse HSI, either ADSL2+ or VDSL, uses a PTM circuit between the DSLAM and the aggregation router. This does away with the 15% speed penalty (no ATM encapsulation), and brings the IP traffic to the DSLAM (hence "IPDSLAM", or "IPDSL" service). Authentication is accomplished via 802.1x, instead of PPPoE. No PPPoE means MTU can be 1500; appropriate for TCP/IP traffic.
The main issue with any form of DSL, as with DOCSIS, is the condition of the plant. When it works, it is very stable and reliable. But when it doesn't work, it can lead to the same support circus you are enduring now.
~Oh Lord, why have you come
~To Konnyu, with the Lion and the Drum