Specifications

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Unified Communications on Cisco Integrated
Services Routers
The following sections describe Unified Communications (UC) application services that are supported
on Cisco 3900 series and 2900 series integrated services routers (ISRs).
• Modules and Interface Cards, page 2
• Call Control, page 2
– Cisco Unified Communications Manager Express, page 2
– Unified Survivable Remote Site Telephony, page 3
– Cisco Unified SIP Proxy (CUSP), page 4
– Gatekeeper, page 4
• Call Control Protocols, page 4
– Trunk-side Protocols, page 4
– Line-side Protocols, page 5
• Unified Communications Gateways, page 6
– TDM Gateways, page 7
– Cisco Unified Border Element, page 8
– Unified Messaging Gateway, page 8
• IP Media Services, page 9
– Conferencing, Transcoding and Media Termination Point (MTP), page 9
– RSVP Agent, page 9
– Trusted Relay Point (TRP), page 9
– Packet Voice Data Module, page 10
• Voice Security, page 10
– UC Trusted Firewall, page 10
– Signaling and Media Authentication and Encryption, page 11
– Virtual Route Forward, page 11