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This is the support site for Andrews & Arnold Ltd, a UK Internet provider. Information on these pages is generally for our customers but may be useful to others, enjoy!
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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, eg to call AAISP support you'd use: sip:+443333400999@aa.org.uk▼
▲The format of your number should be in +44 format,
You do need to use the hostname ''aa.org.uk'' as we use SRV records to direct the call, so using an IP address is not supported.▼
sip:+443333400999@aa.org.uk
▲*You do need to use the hostname ''aa.org.uk'' as we use SRV records to direct the call, so using an IP address is not supported.
*The CLI is not trusted for such calls, so are sent to your SIP handset with a ? on the front, and not passed on if the call is diverted.
*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==
▲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.
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===
▲As mentioned, this does require the client to support SRV records.
* 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]]
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