A customer wants to conduct B2B video calls with a partner using an on-premises conferencing solution. Which two devices are needed to facilitate this request? (Choose two.)

Cisco Expressway-C (Callway) is the internal component that registers endpoints, handles firewall traversal for internal users, and communicates with Expressway-E to facilitate B2B calls, securely routing internal signaling and media.

An MGCP gateway is primarily used for connecting to the PSTN, not for facilitating B2B video calls with another organization's conferencing solution.

Cisco Unified Border Element (CUBE) is primarily a session border controller for SIP trunking to service providers, not directly for B2B video calls between two organizations' conferencing platforms.

Cisco TelePresence Management Suite (TMS) is used for scheduling, management, and monitoring of TelePresence deployments, but it does not directly handle the media and signaling traversal for B2B calls.

Cisco Expressway-E (Edge) is the external component that provides secure firewall traversal for external participants, including partner B2B video calls, allowing them to connect to internal conferencing resources without compromising network security.