VoIP Phones - FritzBox

Some notes fritzbox 7530, taken (with thanks!) from: https://forums.thinkbroadband.com/voip/t/4749882-re-aa-voip-with-fritzbox-7530.html

FritzOS 7.57 with A&A VoIP, all works fine.

Settings as follows:

Under "Telephony -> Telephone Numbers" you will need an entry for A&A, which should look like:

Status Telephone Number Provider Preselection
(green dot) 01yyyxxxxxx voiceless.aa.net.uk* *123#

I obscured our phone number, under "Status" you should see a green dot if successfully registered, the *123# is put in there by the Fritzbox, no need to set that up yourself.

There is an "edit" and "delete" button to the right. Once you click "edit" you see another page "Edit Telephone Number". Here I have got:

under Account Information

Use internet telephone number checked
Telephony provider Other provider

Telephone number for registration

your number in international format, I have +441268xxxxxx
Internal telephone number in the FRITZ!Box** not really important, I have 01268xxxxx
Display name (leave blank)

under Account Information

Username, Authentication name, Password as supplied by A&A
Registrar voiceless.aa.net.uk
Proxy server (leave blank)
STUN server (leave blank)

under Telephone Number Format

Precede the number dialed with these prefix numerals:
Country code select With prefix (0044)
Area code select Without prefix (1268)
Relay outgoing emergency calls without prefixes checked
Relay special rate numbers without prefixes checked

the rest in this section is blank/unchecked

under Additional Settings for the Telephone Number

DTMF transmission RTP or Inband
Suppress outgoing Caller ID (CLIR) CLIR via display name
Caller ID disabled
Provider supports G.726 in accordance with RFC 3551 unchecked
Provider supports call-back on busy (CCBS) in accordance with RFC 4235 unchecked
Provider supports forwarding of calls during the calling phase unchecked
Packet size in milliseconds in send direction 20

under Additional Settings for the Connection

Use telephone number for registration checked
Always register via an internet connection checked

Contact internet telephony provider via

Transport protocol only via IPv4
The provider supports encrypted telephony via SRTP in accordance with RFC 3711 and RFC 4568 unchecked
Media protocol RTP/AVP
Provider supports MWI (RFC 3842) unchecked
Provider does not support REGISTER-fetch unchecked

It may also work with some of the above configured differently, but what is shown above works for me.

FRITZ!Box 7490 / FRITZ!OS:7.59 -- all works fine Philh (talk)

The Additional Settings for the Connection section seems to have been rearranged slightly, compared with the above.

under Additional Settings for the Connection

I have:

Use telephone number for registration checked
Always register via an internet connection checked
Contact internet telephony provider via only via IPv4
Transport protocol Automatic
The provider supports encrypted telephony via SRTP in accordance with RFC 3711 and RFC 4568 checked
Media protocol RTP/AVP
Provider supports MWI (RFC 3842) unchecked
Provider does not support REGISTER-fetch unchecked

The interesting difference here is that I have the encrypted telephony option checked, and it still works.

under Telephone Number Format:

I have:

Country code select none
Area code select none

because my box is globally configured to match its location in Germany, so offers me only With prefix (0049) as an option, which is unhelpful. I tend to dial UK numbers prefixed with 0044, which may be a habit that I developed in order to make sure this setting works for me.

Fritz!Box
Tested on FireBrick SIP Server	Not yet
IPv6 Support
Versions and models Tested	Fon WLAN 7390

Firewall & Security

You will also want to set up firewall rules, as per the VoIP Firewall page.
Also see the VoIP Security page for information about securing your VoIP service.