Hello group, I am configuring VoIP over FR, from A (E&M) to B (E&M) and C (FXO) with (two sub interfaces).. the dial plan is, user from every location must press dial plan TO GET THE TONE from opposite PABX and then it's up to user whether they want to call extension or off-premises call. The problem is, user from A can always get the tone from B and C with 100 % success rate, but when user B and C want to call A, they can only get succes rate 70 % to get the tone. I have ensure that all of the config is same. I'm thinking that may be ,the router in A can not wait for the ACK from PABX in A too long, so the tone sometimes cannot be heard from opposite. Any idea..? Grad _________________________________________________________________________ Get Your Private, Free E-mail from MSN Hotmail at http://www.hotmail.com. _________________________________ FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]