No subject

and it's SIP protocol extensions - so, seems restricted to me ...

Dan.


On Mon, Jan 28, 2013 at 8:21 AM, John Lange <john at johnlange.ca> wrote:
> I didn't mean to imply that Microsoft invented the solution, just that they
> "solved" the problem by adopting the correct solution. However I do think
> Microsoft does deserve a bit of additional credit because to date they are
> the only ones to incorporate a direct sip-to-sip calling solution into the
> core of a commercial product.
>
> In the case of Lync, it's becomes more viable because it's part of the
> standard implementation. If you setup Lync the standard way it's supposed to
> be installed, you get this extra bonus of being able to do sip-to-sip calls.
>
> One thing I have not had any time to explore is how compatible it is with
> non-Lync deployments. Could I call someone on sip.edu for example? As things
> stand, probably not but maybe with some work?
>
> John
>
>
> On Fri, Jan 25, 2013 at 4:18 PM, Ron Dallmeier <rondallmeier at fiber.ca>
> wrote:
>>
>> What you are describing wasn't created by MS (so far as I know)? But I
>> am happy to see that they adopted the correct solution.
>> It sounds identical to sip.edu.
>> We had an project at MRnet (winter of 2004/2005). Bill had set this up
>> on a MRnet server (asterisk and SER). We could direct sip2sip call
>> people at the big universities in the US by their email address.
>> You attempt to make the call using the email address. The sip proxy
>> does a DNS-SRV record lookup to see if there is a sip gateway for that
>> domain, if so the call setup request to sent that way.
>> The sip gateway would know if the target user had a active sip
>> registration or the participating universities would map the email to
>> the respective campus phone using existing database lookups.
>> Funny thing the biggest problem with our project was getting it to
>> work with the UofM's PBX via PRI (we weren't getting the dialed
>> number).
>>
>> ...Ron
>>
>> On Fri, Jan 25, 2013 at 8:21 AM, John Lange <john at johnlange.ca> wrote:
>> > That article about the ** thing is just a gimmick. Basically it's a
>> > speed-dial-by-name. If you a contact list you can already dial-by-name.
>> >
>> > But Ron's comment about email addresses reminded me of something...
>> >
>> > A few years back we talked about the challenge direct "dialing" people
>> > with
>> > the keypad who don't have a phone number. There have been a few
>> > proposals in
>> > this area specifically things like ENUM.
>> >
>> > What I've come to realize in the intervening time is that this problem
>> > is
>> > already well on it's way to solving itself and it's actually not that
>> > complicated.
>> >
>> > Step 1. Forget about the numeric keypad as the problem. With the
>> > proliferation of smartphones, just about everyone effectively dials by
>> > name.
>> > They lookup a contact and then press "call". On my smartphone, when I
>> > touch
>> > the "phone" button, it doesn't come up with a keypad, it comes up with a
>> > list of searchable contacts. I can't even remember the last time I
>> > called
>> > someone by punching in numbers using the keypad. So while I may not be
>> > typical, it does prove that it's possible to get rid of they keypad as
>> > the
>> > primary input device.
>> >
>> > With deskphones it's the same thing. If you look at Microsoft Lync, even
>> > the
>> > desk phone is integrated with your address book. I just start spelling
>> > the
>> > name with the keypad and typically within 3 key presses it's narrowed
>> > the
>> > list down to my intended contact (It automatically matches the name or
>> > the
>> > phone number as I type it in).
>> >
>> > Step 2. Adopt a standard for direct sip-to-sip calling. Microsoft (yes
>> > Microsoft!) has already solved this problem with an elegant and simple
>> > solution; DNS SRV. It works like this: take an email address and look up
>> > the
>> > sip service for my domain using DNS SRV, then call that destination
>> > directly
>> > bypassing the PSTN.
>> >
>> > So lets take this as a practical example. Lets say I have a contact in
>> > my
>> > address book "Mike Smith". I probably have his name, email and phone
>> > number.
>> > If I want to call Mike, I look up his contact and touch "call". In the
>> > background my voice application (my "phone") does DNS SRV lookup for SIP
>> > using his email address. If it returns a result, I "dial" that and talk
>> > to
>> > Mike. If it fails, I fall-back to a traditional PSTN/Cell call.
>> >
>> > John
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>
>
>
>
> --
> John Lange
> www.johnlange.ca
>
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