Dear OzzieGeorge
thank you for the reply. we are using Dterm phone for making outgoing calls. From the frame directly we can make a calls by using analogue phones that has been tested. when we are trying from the Dterm phone at the operator, by pressing digit '0' ..getting exchange dialtone, but calling number is not taking and automatically getting exchange dialtone back after dialing second digit in mobile number. pl advise
thanks in advance