Thanks Patrick this helps, I was having some firewall blocking issues, but it still not working yet. AQL technical support is limited in this area, so if I can solve this I will try to do a how-to for them and me.
I have guessed the registration string is username:
password@sip.aql.com
I guess also that the field user context is my account username however it could also be the id number I am not sure, I will try both.
Regarding the second part of the instructions below is this necessary and where in the GUI would I attend to this?
Also, you'd need to place the following in your extensions.conf file (where nnnnnn is the VoIP ID for the particular inbound number you want to use):
[outbound]
exten => _X!,1,Set(CALLERID(num)=nnnnnn)
exten => _X!,2,Dial(IAX2/aql-outbound/${EXTEN})
[iax-inbound]
exten => nnnnnn,1,Dial(SIP/100)