/mcpDescription Restriction The CMC and FAC features do not support overlap sending because Cisco Unified Communications Manager cannot determine when to prompt the user for the code. If you check the Require Forced Authorization Code or the Require Client Matter Code check box in the Route Pattern Configuration window, the Allow Overlap Sending check box is automatically unchecked and vice-versa. Overlap sending You cannot configure CMCs or FACs for speed-dial buttons. You must enter the code when the system prompts you to do so. Speed-dial buttons Feature Configuration Guide for Cisco Unified Communications Manager, Release 15 and SUs 605 Custom Features Client Matter Codes and Forced Authorization Codes Restrictions