The design comparison and current status of TWAREN

The design, comparison and current status of TWAREN voicemail systems Chia-Hung Hsu Li-Chi Ku Che-Nan Yang 2007/08/27

Outline TWAREN Vo. IP Architecture Voicemail Systems SEMS Unity Asterisk Conclusions APAN 24 2

Architecture APAN 24 3

Architecture (cont. ) APAN 24 4

Architecture (cont. ) APAN 24 5

Voicemail Systems SEMS (SIP Express Media Server) Media Server for SIP Based Vo. IP Services. Separation of Media and Control. APAN 24 6

Voicemail Systems (cont. ) Modular Design • Core and Plug-ins SER and SIP Proxy Server APAN 24 7

Voicemail Systems (cont. ) Signaling APAN 24 8

Voicemail Systems (cont. ) SEMS Services in TWAREN APAN 24 9

Voicemail Systems (cont. ) Example of Voicemail Format APAN 24 10

Voicemail Systems (cont. ) CISCO Unity One of the Cisco® Unified Communication Systems powerful unified message (e-mail, voice, and fax messages) intelligent voice messaging (full-featured voice mail providing advanced functions) Commercial systems APAN 24 11

Voicemail Systems (cont. ) Multiple required: network services integration • Dynamic Domain Name Servers • Directory Servers • Message Stores Supported message store • Microsoft Exchange • IBM Domino Standards compliance • VPIM（Voice Profile for Internet Mail，RFC-3804） • AMIS（Audio Messaging Interchange Specification） APAN 24 12

Voicemail Systems (cont. ) Signaling APAN 24 13

Voicemail Systems (cont. ) Signaling (cont. ) APAN 24 14

Voicemail Systems (cont. ) Asterisk PBX Switching Core • accept calls from interfaces and handle according to the dialplan. Application Launcher • ring phones, connect to voicemail, etc. Codec Translator • compressed with different codecs to seamlessly talk to one another. Scheduler and I/O Manager • which applications and drivers can take advantage of. Dynamic Module Loader APAN 24 15

Voicemail Systems (cont. ) Loadable Module APIs • Channel API • Application API • Codec Translator API • File Format API APAN 24 16

Voicemail Systems (cont. ) APAN 24 17

Voicemail Systems (cont. ) Signaling APAN 24 18

Conclusions APAN 24 19