We have an account with multiple branch offices and a corporate HQ. We have an IVR set up for one location with a list of key prompts to route calls to different departments. We are running in to a problem when a customer gets in to an individual user's voicemail platform and attempts to dial "0" to get the operator. Right now, if the caller dials "0" they get the main operator at Corporate HQ, not the Operator at the local branch office. Is there a way to prevent callers from dialing any extension and being routed while in voicemail, or more specifically, is there a way to segment their options so that they cannot pick an extension outside of the branch office they are calling?