23 Apr
2014
23 Apr
'14
12:45 p.m.
But far from being required. If you're putting the services in obvious
locations there is no need to discover anything.
For example, if the SIP services for ke4rap.ampr.org were hosted at
ke4rappbx.ampr.org, and we're working off the
callsign(a)callsign.ampr.org schema, a SRV record (and lookup) is
necessary, obviously, for the call to be delivered. But, I don't
need a SRV record to tell the world I am hosting SIP at
ke4rap.ampr.org when that's the de facto destination for a call for
ke4rap.
Sent from my iPhone
> On Apr 23, 2014, at 1:07 AM, K7VE - John <k7ve(a)k7ve.org> wrote:
>
> (Please trim inclusions from previous messages)
> _______________________________________________
> 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
>>>>