![]() ![]() As long as you have the device for Voice over Internet Protocol (VOIP) or application on a computer or smartphone you are able to make calls. Internet based calling works of a high speed Internet connection which can be found almost at any location now days. The more I researched the more I was interested in Internet based phone calls. I started to research how it was possible to make phone calls over the Internet. In about 11 years Skype has transformed itself to become a user friendly product for people at home. Now in 2013 Skype can be used on smart phones, computers, and phone devices for phone built in with Skype program. The program Skype at the time when I started to use it was only for computers. What I found so interesting about using Skype was that I was able to make phone calls from computer to computer and to landlines. I first started using Skype around 2003 when I was about 16 years old. I came into interest about this topic after using programs like Skype. There is a good explanation of how to do this for a large organization in the SIP.EDU cookbook.My blog is about VOIP, in other words making phone call over your Internet connection. I achieved this by first following the instructions here in Step 7, then, since I didn’t have an IP phone, I configured the OnSIP control panel to forward all calls to my “extension” to my PSTN phone number. ![]() In other words, somebody with an IP phone could dial my email address and my regular PSTN desk phone would ring. ![]() There are detailed instructions on the OnSIP website.īefore I got my IP phone working, SIP calls addressed to my email address would come to my POTS phone. The OnSIP control panel allows you to specify the domain name for your SIP account for yourself. Second, you must configure your SIP server to service requests addressed to your domain name. HostGator customer support modified the DNS records within a day, but didn’t get it working until the second attempt. So I sent the following email to could you add the following DNS SRV record to : For the type of account I have there, HostGator does not let you administer your own DNS. The DNS server for my domain name,, is HostGator, and my VoIP service provider is, so these instructions explain how to do it for this combination of DNS and SIP servers.įirst, you must configure your DNS to forward SIP requests for your domain name to your SIP server. For example, DNS for points to Google for email, to OnSIP for SIP and to for There is an excellent explanation of this concept at, together with links for how to add SRV records to your DNS at, and. The DNS records that specify where your emails go are called MX records the DNS records that specify where your voice calls go are called SRV records. If you have your own domain name, you can do this by adding records to the DNS (Domain Name Service) for your domain. But it is more user-friendly to use the same address for both email and voice calls. A SIP address looks exactly like an email address: If you are using a hosted VoIP service like OnSIP, the domain for your SIP server would normally be that, or whatever. So if you want a wideband call you must use the SIP addressing scheme. The problem with these numbers is that the network tends to assume that calls made using them are destined for the PSTN, and consequently encodes them using a narrowband codec like G.729 or G.711. Most phones are addressed with a phone number – technically called an E.164 number after the ITU specification that defines the world-wide PSTN (Public Switched Telephone Network) numbering scheme. ![]()
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