CCI-001548

A Call Center or Computer Telephony Integration (CTI) system using soft clients must be segregated into a protected enclave and limit traffic traversing the boundary.

The local Enterprise Voice, Video, and Messaging system must have the capability to place intrasite and local phone calls when network connectivity is severed from the remote centrally located session controller.

The enclave must be dual homed to two geographically diverse DISN SDNs and DISN WAN Service (NIPRNet or SIPRNet) Aggregation Routers (AR) or DISN Provider Edge (PE) routers.

The dual homed DISN core access circuits must be implemented so that each one can support the full bandwidth engineered for the enclave plus additional bandwidth to support surge conditions in time of crisis.

The required dua- homed DISN Core or NIPRNet access circuits must follow geographically diverse paths from the CER(s) along the entire route to the geographically diverse SDNs.

Eight hours of backup power must be provided for LAN Infrastructure, WAN boundary, VVoIP infrastructure, and VVoIP endpoints to support Special-C2 users.

The Session Border Controller (SBC) must filter inbound SIP and AS-SIP traffic based on the IP addresses of the internal Enterprise Session Controller (ESC), Local Session Controller (LSC), or Multifunction Soft Switch (MFSS).

The Session Border Controller (SBC) must be configured to terminate and decrypt inbound and outbound SIP and AS-SIP sessions to ensure proper management for the transition of the SRTP/SRTCP streams.

The Session Border Controller (SBC) must be configured to only process packets authenticated from an authorized source within the DISN IPVS network.

The Session Border Controller (SBC) must be configured to only process signaling packets whose integrity is validated.

The Session Border Controller (SBC) must be configured to validate the structure and validity of SIP and AS-SIP messages so that malformed messages or messages containing errors are dropped before action is taken on the contents.

The Session Border Controller (SBC) must drop all SIP and AS-SIP packets except those secured with TLS.

The Session Border Controller (SBC) must be configured to manage IP port pinholes for the SRTP/SRTCP bearer streams based on the information in the SIP and AS-SIP messages.

The Session Border Controller (SBC) (or similar firewall type device) must perform stateful inspection and packet authentication for all VVoIP traffic (inbound and outbound) and deny all other packets.

The Session Border Controller (SBC) (or similar firewall type device) must deny all packets traversing the enclave boundary (inbound or outbound) through the IP port pinholes opened for VVoIP sessions, except RTP/RTCP, SRTP/SRTCP, or other protocol/flow established by signaling messages.

The Session Border Controller (SBC) must be configured to notify system administrators and the information system security officer (ISSO) when attempts to cause a denial of service (DoS) or other suspicious events are detected.

The Enterprise Voice, Video, and Messaging system connecting with a DISN IPVS must be configured to signal with a backup Multifunction Soft Switch (MFSS) (or SS) if the primary cannot be reached.

The Multifunction Soft Switch (MFSS) must be configured to synchronize with at minimum a paired MFSS and/or others so that each may serve as a backup for the other when signaling with its assigned Local Session Controller (LSC), thus improving the reliability and survivability of the DISN IPVS network.

A MAC Authentication Bypass policy must be implemented for 802.1x unsupported devices that connect to the Enterprise Voice, Video, and Messaging system.