SBC already announced they will be delayed for at least another year. The problem is Microsoft's IPTV Software.
Swisscom has had a nightmare deploying it and has found serious flaws in it. Here is article about the trouble they are having with MIcrosoft. There are also reports of a single server now being required to support every 10 users.
http://www.theregister.co.uk/2005/06/01/ms_iptv_strategy_in_tatters/ SBC is screwed here they are betting on using FTTN architecture. SBC claims users will see 20-25Mbps using VDSL2 depending on the distance of your home and maybe 1-3 meg up, most of which will be used for their video. They've slipped a year, with 2008 now the goal. Keep in mind VDSL2 chipsets are not even ready yet.
when you need bandwidth for HD (9 meg per live encoded channel) for one TV set in a house, SBC is going to be cutting the overall bandwidth really thin in diving it up. SBC is betting that VDSL2 would have been here sooner and is betting compression would reduce the bandwidth they needed. Vendors of course promised all this. SBC's tech guys knew they were taking a risk, but management decided that was a better option than spending the money Verizon is. I think by the time SBC deploys this technology Cable will have trounced SBC in bandwidth using DOCSIS 3.0 using channel bonding and make SBC's offering look pitiful. I mean if you only get dial up speeds on your computer because
people are watching TV what kind of Competitor does SBC think it can be?
This is the reason Verizon went the way they did. It is more costly but more future proof. They are notgoing IPTV because they knew it was not ready for prime time and will eventually deploy it.
Instead they will depoly a more traditional type of system using Miscrosoft software handeling the program guide and other features on the boxes. This software has been deployed before on some Comcast systems and has been tested and Verizon has faith in it to work.