• Part of the Cisco IP Voice Streaming Application
• Streams spoken messages and various call progress tones. A set of predefined tones and announcement.
• Receiving devices such as IP phones or gateway must be capable of SCCP to utilize this feature

<note important>Annunciator only work with SCCP. Not SIP, MGCP or H.323 so this pretty much rule out all the voice gateways and SIP phones</note>

• Support G.711, G.729 and wideband codecs
• The following feature require an annunciator. To explain why.
  • Cisco Multilevel Precedence Preemption (call failure)
  • Integration via a SIP trunk (call progress and DTMF tones)
  • Cisco IOS gateways and intercluster trunks (ringback)
  • System messages (call failure)
  • Conferencing (Barge tone)

• A standalone server with a single CPU and without CallManager service can support up to 255 streams
• High performance server with dual CPUs can support up to 400 streams
• Default is 48 streams and recommended for co-resident

• Under Media Resources > Annunicator