In this document, the term non-SIP Communication Manager refers to a Communication Manager supporting no SIP signaling groups. A non-SIP Communication Manager supports TDM stations (for example, DCP, analog, BRI) and H.323 stations. TDM stations can be administered to port networks and branch (H.248) gateways. H.323 stations can register to Communication Manager through Processor Ethernet. Since no SIP signaling groups are supported on non-SIP-enabled Communication Manager (by definition), such systems do not support SIP stations.

Note that the only way endpoints administered to a non-SIP-enabled Communication Manager can talk to endpoints elsewhere in the enterprise is through non-SIP trunks to a Communication Manager administered as either a feature server or evolution server.