The V.150 Minimum Essential Requirements feature allows you to make secure calls in a modem over IP network. The feature uses a dialup modem for large installed bases of modems and telephony devices operating on a traditional public switched telephone network (PSTN). The V.150.1 recommendation specifically defines how to relay data from modems and telephony devices on a PSTN into and out of an IP network through a modem. The V.150.1 is an ITU-T recommendation for using a modem over IP networks that support dialup modem calls.
The Cisco V.150.1 Minimum Essential Requirements feature complies with the requirements of the National Security Agency (NSA) SCIP-216 Minimum Essential Requirements (MER) for V.150.1 recommendation. The SCIP-216 recommendation has simplified the existing V.150.1 requirements.
Media Gateway Control Protocol(MGCP) T1(PRI and CAS) and E1(PRI) trunks
Session Initiation Protocol (SIP) trunks
Skinny Client Control Protocol (SCCP) for analog gateway endpoints
Secure Communication Interoperability Protocol-End Instruments (SCIP-EI)