The company I work for currently uses a ROLM CBX and it has a feature call DISA or Direct Inward System Access. for those not familiar with Rolm or this software feature, it in short, answers a call on a specific trunk, the caller then enters a numeric code if entered correctly will then provide dial tone from the switch allowing the caller to make internal and external calls. My question is this, can CCM be configured to do such a thing? Is it feature and if so what does Cisco call it? Does it have to be a separate trunk?