When handed a URL type address for telephony, is there a DNS "TX" record (like MX but for telephone/Video) that could be looked up for an address to use to connect the call? I would like to have a "gateway server" (probably *) that anyone who knows the email address of a member of staff can use to connect to them with. If the details of this server were in my DNS then anyone trying to call someone at cybericom.co.uk could find the server to make the connection with. Regards Chris.
Chris Lee wrote:> If the details of this server were in my DNS then anyone trying to call > someone at cybericom.co.uk could find the server to make the connection > with.Yes DNS has a TXT field, but in this case I think you're after ENUM.164, See the following URLs for details about ENUM: http://www.voip-info.org/wiki-ENUM http://www.voip-info.org/wiki-Asterisk+E164+Call+Routing however the problem with enum is the lack of wide spread deployment... Which has annoyed myself and others to try and think of a solution to deploy our own enum zone, but without conflicting with existing numbers, as using pots numbering would have 1 or 2 side effects, firstly people lie and abuse systems. Technically you could get people singing up with phone numbers for the white house. Using pots numbers could lead to serious privacy issues for individuals, businesses want people to find them, individuals might not want their phone number linked with their email, web address and so on and so forth and easily handed over to any and all that do a DNS lookup on their phone number. So what do you do? Well myself and a few friends bashed our heads together then started reading through a ton of ITU information about international direct dialling prefixes and found +882 is set aside for international bodies (companies) that provide communications such as satellite phones and the like. From that range ITU allocates sub prefixes 00 to 99 so far they're up to 34. Long story short this is the area most likely to be given to any sort of parallel system trying to get an enum service running. We've hacked up a few webpages to inject dns entries into mysql which power dns then spits out on request. To try this or even just to have a curious look go to: http://e164.freenetworks.org A lot of the work on this is for the benefit of community wireless groups, but is also useful for the wider internet community as well. -- Best regards, Duane http://www.cacert.org - Free Security Certificates http://www.nodedb.com - Think globally, network locally http://www.sydneywireless.com - Telecommunications Freedom http://happysnapper.com.au - Sell your photos over the net!
In your DNS zone file for the domain you are using, put: _sip._udp SRV 0 0 5060 sipproxy.yourdomain.com. sipproxy 300 IN A 1.2.3.4 John Chris Lee wrote:> When handed a URL type address for telephony, is there a DNS "TX" record > (like MX but for telephone/Video) that could be looked up for an address > to use to connect the call? > I would like to have a "gateway server" (probably *) that anyone who > knows the email address of a member of staff can use to connect to them > with. > If the details of this server were in my DNS then anyone trying to call > someone at cybericom.co.uk could find the server to make the connection > with. > > Regards > Chris. > > _______________________________________________ > Asterisk-Users mailing list > Asterisk-Users@lists.digium.com > http://lists.digium.com/mailman/listinfo/asterisk-users > To UNSUBSCRIBE or update options visit: > http://lists.digium.com/mailman/listinfo/asterisk-users
----- Original Message ----- From: "Chris Lee" <cslee-list@cybericom.co.uk> To: <asterisk-users@lists.digium.com> Sent: Tuesday, March 02, 2004 6:42 AM Subject: [Asterisk-Users] Does it exist - DNS "TX" record?> When handed a URL type address for telephony, is there a DNS "TX" record > (like MX but for telephone/Video) that could be looked up for an address > to use to connect the call? > I would like to have a "gateway server" (probably *) that anyone who > knows the email address of a member of staff can use to connect to them > with. > If the details of this server were in my DNS then anyone trying to call > someone at cybericom.co.uk could find the server to make the connection > with.Look here: http://www.voip-info.org/wiki-DNS+SRV