For billing we are developing our own software. actually we are working on a prepaid calling card solution also for one of our client in UK.
anyways for gatekeeper i’am considering Quintum. what do you suggest? and what is the real advantage of hardware device over a software gatekeep like openH323 gatekeper?
About Codec do u think G.723.1 or G.729 are ok for low bandwidth users? any further suggestions are welcome ..