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Mention voipfone's softphone app - probably the easiest to get going

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__NOTOC__<indicator name="Configuring">[[File:Menu-cog.svg\|link=:Category:VoIP Features\|30px\|Back up to the VoIP Features Category]]</indicator> [[File:VOIP-sipURIcall.png\|thumb\|Calling a SIP URI with the 'Ekiga' softphone ]] Incoming calls can be made from the internet to your number by using a SIP URI such as: sip:number@aa.org.uk A call to a URI like this will be delivered just like a normal incoming call. Except the caller won't incur any call charges. The format of your number should be in +44 format, ege.g. to call AAISP support you'd use: sip:+443333400999@aa.org.uk So, for example, without any configuration or account details a softphone may call your A&A provided VoIP number, as shown in the image here. As mentioned, this does require the client (the phone you're calling from) to support SRV records. ==Known working clients== You may need to tell some of your contacts how to call you using a sip: URI. To help, the following SIP clients are known to work: ===Softphones=== * Ekiga (Linux) * Linphone 4.0.1 (Android) * Twinkle (Linux) - although currently (Dec 2018) there's a problem with SRV records when using systemd-resolved (on Ubuntu and Debian at least) * Voipfone Softphone (Android) deserves a mention. It needs an account with voipfone.co.uk, but you can signup and try for free. Their softphone app just works out of the box for calling SIP URIs ==Known not-working clients== * Linphone 3.6.1 (Linux) - doesn't use SRV DNS records * CSipSimple, GS Wave - need a SIP account to be enabled * Zoiper (Android) - appears at first to work, but closer examination shows that it uses the SIP account to place calls (even when that account is disabled) [[Category:VoIP Features]] [[Category:VoIP How to\|Calling over the internet]]