We have an Asterisk 1.6 configured and working. SIP as the authentication, and no major modification… Our users use Aastra 6757i phones as phone hardware. There is firewall setup in our network and NATted.
We are interested in implementing a VoIP for our external employees (remote). How can I go about this? I research and we can either do HTTP or VPN (any other)? Since we are using SIP, can we use IAX2 for remote users, or using both will not work?
What’s the best way of going about connecting our remote users? If possible, we want to be able to shipp the remote users our Aastra 6757i, and with a simple authentication (username and password)… they will be able to make internal and external using our VoIP. I know it offers a lot of security risk… but I did find a lot of websites on how to tie down our Asterisk for SIP. However, any help would be very helpful to me.