If you are not bound to a legacy SCCP-only environment, evaluate these modern options:
This article provides a definitive resource on obtaining, installing, configuring, and troubleshooting CIPC 8.6.6.1. Whether you are preserving a legacy system, setting up a home lab for CCNP Collaboration studies, or supporting a business that has not yet migrated to Jabber or Webex, this guide is for you. Cisco Ip Communicator 8.6.6.1 Download