Two Dial Plans... Sometimes Less is (not) More
Some PBX professionals familiar with Cisco or Avaya phone systems are under the impression that if you add Lync voice to the environment, the administrative complexities could outweigh the benefits. "You'd have to create and maintain two dial plans," they often say. Less is more, oftentimes, but before dismissing the notion, consider the benefits of adding Lync to an existing PBX environment.
Lync is connected to existing PBXs for two reasons: