Cisco CallManager exposes sophisticated control of the AVVID telephony platform via its Computer/Telephony Integration (CTI) APIs. These APIs allow custom applications to register interest in CallManager device call events, and take full control of those devices to make, take, transfer, end calls, etc. Applications may monitor or control Cisco IP Phones, create and register 'soft' phone ports (CTI Ports) which provide media streaming capabilities, and manage CTI Route Points to queue and distribute high-volume incoming calls.

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