RE: RE: Securing Other URI (Tel URI) scheme

>IMO you may use the domain of any provider that will be 
>willing to route the call to the proper destination. E.g. you 
>could use your own provider if you have one and it does this. 
>(I realize this is a bit controversial
>- not all agree this is a proper usage.)
> 
>However this will not guarantee you will get a secure call to 
>a destination on the PSTN. Once the call leaves the sip 
>network all bets are off.
> 
>IMO a key value of TEL is that it does not dictate the 
>protocol used to reach the destination, whereas a sip/sips 
>URI does.

I am not sure I understand correctly, but if you use sip/sips and reach
a PSTN gateway you will not have SIP all the way (it is nowhere said
that you can't send sip to a PSTN gateway).

So, from that perspective I don't see a difference between sip and tel.
Both are only schemes, and if they are used with SIP it's quite obvious
that SIP is going to be the protocol. If they reach a gateway something
else will be used - no matter whether the scheme is sip or tel.

Regards,

Christer

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