Owl’s eXtensible Collaboration Bridge (XCB) was designed specifically to meet the needs of heterogeneous classified chat communities. With the XCB, organizations can integrate legacy chat protocols like IRC and HCL Sametime with, standards based Extensible Messaging and Presence Protocol (XMPP) chat protocol (XMPP has been selected as the chat protocol for DISA, because it enables multi-vendor interoperability). XCB systems operate on separate networks, operating at different security levels, connected via Collaboration Gateway (CG), Owl’s cross domain chat system.