[Serusers] Managing callerid for incoming PSTN

Dear All I am new to SER and wanted to figure out how to manage callerid when displayed on a end phone. I have a E1 line terminating on a Cisco Router which we use for inbound/outbound calls. We dial 9 to make a outbound call via this e1. When a incoming call comes, it displays the callerd as presented by my operator. Now, if the user wants to call back, he cant do by the menu of callback since dialing out from pstn needs a digit 9 prefix. I would like to know if I can prefix 9 before forwarding call to PSTN so that the callback from the extension works smoothly. Thanks in advance. Vish __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com