Dialing rules question!!

[Speedy2k]

I want to know if it is possible to make a dialing rules that will dial a numer wait for the connection and after that dial the complete contact number?? because i have a ip pbx at home and i want to lower down the charges on my cell phone, so i have make my home number nation wide free, and when my pbx see my cell phone number it answer without a ring and wait for a phone number to be dialed out. I have tried with the + option and set the international code to my home number with a , at the end for a pause like this "18888888888,"
this is not working perfectly, because when it dial the contact number, this is in this format 1(88888-8888 and when it get the ( it stop dialing, so my pbx only receive the 1, so if it is possible to change the dialing rules to remove the ( and the ) and the - from my phone number before dialing it, it would be really cool thanx a lot!