23 Apr
2014
23 Apr
'14
12:07 p.m.
SRV records help with discovery.
________________________________
John D. Hays
K7VE
PO Box 1223, Edmonds, WA 98020-1223
On Tue, Apr 22, 2014 at 9:49 PM, Danny Messano <drmessano(a)gmail.com> wrote:
> (Please trim inclusions from previous messages)
> _______________________________________________
> There really is no need to get ENUM or DNS SRV records involved.
>
> ENUM is a useless shim that redirects landline numbers to SIP (or IAX)
> addresses. DNS SRV records are only really necessary for failover or
> if your services are hosted at another location. (I know, thats a bit
> over-simplified. Keep going..)
>
> Any softphone could dial a URI such as sip://ke4rap@ke4rap.ampr.org.
> I can easily build an extension on my PBX to place a call to
> sip://ke4rap@ke4rap.ampr.org when I dial any numeric string I desire
> from a numeric-only endpoint (269 for example). This numeric-to-URI
> translation for numeric endpoints easily takes place in the dialplan
> on the sending end, and should not rely on some new set of numeric
> addresses to further complicate things.
>
> On the receive end, a call to ke4rap@ on my PBX (ke4rap.ampr.org)
> could be routed to any sort of endpoint, numeric or otherwise.
>
> Now supposed AA4AA would rather not run a PBX? Well, if some nice guy
> wants to set up a shared system, we only need to know AA4AA is hosted
> on KB3AAs PBX or some shared AMPR PBX and can be reached at
> SIP://AA4AA@KB3AA.ampr.org or sip://AA4AA@asterisk1.ampr.org.
>
> This is the very basis of peer-to-peer URI calling. All you really
> need is a standard DNS lookup and some idea who you are calling.
>
> This also exists RIGHT NOW. If i know CALLSIGN has a PBX on here and
> is set up in DNS, I could call him right now at
> CALLSIGN(a)CALLSIGN.ampr.org and the call will route. No other acronyms
> other than DNS need to be harmed for this to take place. :)
>
> Danny Messano
> KE4RAP
>
> Sent from my iPhone
>
>> On Apr 22, 2014, at 10:32 PM, Don Fanning <don(a)00100100.net> wrote:
>>
>> (Please trim inclusions from previous messages)
>> _______________________________________________
>> Should be quite doable provided there isn't lots of firewalling or natting
>> involved. If not this protocol, IAX2 within Asterisk for which there are
>> already ham radio adaptations made to it (ie: app_rpt and other pieces) can
>> easily make the connection. Some sort of e164/enum lookup based on
>> callsigns would also be beneficial but that also requires DNS hackery
>> [something to be added along with SRV records?]
>>
>>
>>> On Tue, Apr 22, 2014 at 3:51 PM, Eric Fort <eric.fort(a)gmail.com>
wrote:
>>>
>>> (Please trim inclusions from previous messages)
>>> _______________________________________________
>>> actually making SIP work really well over amprnet would be cool.
>>>
>>>
>>>> On Tue, Apr 22, 2014 at 2:49 PM, Tom Hayward <esarfl(a)gmail.com>
wrote:
>>>>
>>>> (Please trim inclusions from previous messages)
>>>> _______________________________________________
>>>>> On Tue, Apr 22, 2014 at 2:26 PM, Don Fanning <don(a)00100100.net>
wrote:
>>>>> (Please trim inclusions from previous messages)
>>>>> _______________________________________________
>>>>> ZeroConf depends on Multicast which doesn't work well over
>>> tunnels/VPN's
>>>>> unless specifically configured for such.
>>>>
>>>> How about DNS SRV records? Does the AMPR DNS robot support that record
>>>> type?
>>>>
>>>> http://en.wikipedia.org/wiki/SRV_record
>>>>
>>>> Tom KD7LXL
>>>> _________________________________________
>>>> 44Net mailing list
>>>> 44Net(a)hamradio.ucsd.edu
>>>> http://hamradio.ucsd.edu/mailman/listinfo/44net
>>>