 Sipura 2100 broadvoice - problems calling a cellphone
Hi guys, I'm having the following problems dialing in my sipura 2100/broadvoice calling to a cellphone:
1) When I call the cellphone, the ringing tone, can't be heard on my side, just a silence, and after a while the call is answered, but I can't hear the "calling" tone.
2) In some cases, calling to a cellphone, It calls just twice, and after that, I can see in the cellphone screen : Call not answered, then I wait just a bit more time and it calls again, and then I can Answer.
3) In other cases after dialing to a cellphone, I hear a silence, and then the prompt tone comes back, but if I wait a bit more time, the cellphone starts ringing (even with the prompt tone) - when I answer the cellphone, the prompt tone goes away and I have the voice and can talk normally.
Any help would be apreciated, thanks much.. | 
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