[Sipping-emergency] Re: Emergency-req: remarks 1-4

> There are several installations that use HFC as primary line. They are 

We're still not connecting. HFC might well be used for regular 
telecommunications subscribers, but the 'last-mile' model is constrained 
to the case that the PSAP uses IP access, while the emergency callers 
only use regular PSTN, however they get there.

> installed in most of the largest cities in the US. The products are from 
> Arris (co-owned by Nortel at one time, I use to work on the Nortel team 
> of that partnership several years ago). Dallas/Fort Worth (where I am) 
> has had the opportunity to convert over to HFC and off wire-pairs for 
> more than a year for my primary phone service. The provider is a little 
> company called AT&T. The business goal of AT&T is to penetrate all the 
> 32 NFL cities (their term).
> 
> At the MSO Headend, there is connectivity to a Class 5 switch (either 
> co-located, or feed to it). Thus, this MSO might be quite a ways outside 
> of the PSAP jurisdiction (likely not 100 miles in AT&T's case in the 
> near term - but we are talking about years from now also)

That's all true and important for the end-to-end model, but completely 
irrelevant to the last-mile model.

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