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For "IP1" (Or whatever you call the AAISP account) remove all codecs except "G.711 a law". This setting will generally give the best audio quality.
▲=== Other optonal settings ===
If there are problems with recognition of DTMF tones by other systems consider setting "RFC2833" and avoid using "Audio". in the setting:
Features -> General Information -> Call Waiting - set to Disabled
Settings -> TelephonyTime&Date -> AdvancedTime SettingsZone -> RFC28330 GMT
Settings -> Time&Date -> Primary Server -> time.aa.net.uk
Settings -> Time&Date -> Date Format -> YYYY-MM-DD
Check that the Number Plan/Assignment is set to use the VoIP rather than the fixed (pstn) line:
Settings - Number Assignment Set the VoIP for outgoing, and set the others to suit...
It may not say the above and Automatic negotiation of DTMF transmission will need to be Yes
Set the Tone Pattern to be UK:
Settings -> Management -> Local Settings -> Tone Pattern=United Kingdom
You may want to remove, or edit, the 'Info Services' - this is the information such as weather and so in that can be displayed on the screen:
Settings - Info Services
== Quirks ==
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