Thank you Mike for your Help.
Yap correct, we r getting the same problem u described them in ur reply.
regarding the pdd, we tried all options available and it’s always 20 seconds, even we connect the analogue line to a normal handset and we got 20 sec.
In the digital DX E1, is the progtone available?? if yes and we enable it, it will work? or we will have problem with the answer supervision also ?
any other solutions suggested to create a fake ring tone?