We have Asterisk 1.2 and using 4E1 digium.
We just want to know if what is the best setup we can integrate with our system.
a. What is the best protocol to use?
b. Is asterisk capable of h323, sip and IAX at the same time?
c. What will be the best codec to use in order to have best quality?
d. If we will use h323. sip and IAX? What will be the best codec to use to have a good bandwidth consumption?