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  • 1. Voice & Data Convergence Network Services January 11, 2001
  • 2. PSTN = Public Switched Telephone Network  Although the PSTN is effective and does a good job at what it was built to do (switch voice calls), many businesses are striving to change it to a new network whereby voice rides on top of a data network.
  • 3. Drawbacks to the PSTN  Data has overtaken voice as the primary traffic on many networks built for voice.  The PSTN cannot create and deploy features quickly enough. Only the venders of the equipment could develop the applications for that equipment.  Data, Voice, & Video cannot converge on the inflexible PSTN as currently built.  Wasted bandwidth using a 64k connection.
  • 4. VoIP = Voice over IP  Provides an advanced digital communications network that bypasses the traditional public switched telephone system and uses the Internet to transmit voice communication.
  • 5. VoIP Signaling Protocol  H.323- ITU standard for transmitting audio video and data across an IP network.
  • 6. IP Telephony  IP Telephony is the technology which allows for data, voice, and video to be transmitted over a single, IP based network infrastructure.
  • 7. IP Telephony Pilot Project  In the 4th Q 2000, Network Services, in cooperation with Telecommunications and OIR have begun to implement IP Telephony on the UF campus. Cisco’s AVVID (Architecture for Voice, Video and Integrated Data) family of products were chosen because of their scalability and availability in the current market.
  • 8. UF AVVID Campus Pilot Analog Gtwy -4 MCS-7835 Call Mgr. NERDC 7960 C3524-PWR MCS-7835 Call Mgr. OIR 7960 C3524-PWR PSTN Service UF Campus Core C3524-PWR PRI (future) C3524-PWR Analog Gtwy -4 7960 DDF/CETS CI SCO V G200 V OI E GATEW C AY P OW R E RP S ACT VI Y I T MCS-7835 Call Mgr. Telecomm VG200 7960
  • 9. Key Benefits  Lower Total Cost of Ownership: – reduced PSTN circuits – reduced long distance – reduced operational costs (MAC) – unified MIS for voice & data
  • 10. Key Benefits (cont’d) Next generation business applications: Unified messaging integrated email, voice mail, fax Web-Telephony Integration / CTI push / pull technology telecommuting / tele- learning
  • 11. The Next Steps  Rollout phones to test sites  H.323 Gateway to PSTN  Call Manager Clustering  Unified Messaging
  • 12. Cisco IP Phone  Model 7960  Executive set: – 6 programmable line /feature – 4 interactive soft keys: • Messages • Directory • Help • Settings • Services – graphic capability
  • 13. Cisco Call Manager  Administration – phone / user setup – features: • caller id • call forwarding • call park / hold • DID / DOD • Distinctive ring • Call Detail Records • Etc.
  • 14. VoIP Issues  Call Management – cost accounting – cost modeling / production pricing – admin policy – dial plan
  • 15. VoIP Issues (continued)  QoS – bandwidth limitations – Traffic Shaping (control the usage) – delay – jitter – packet loss
  • 16. VoIP Issues (continued)  Wireless Applications  Open Interoperability – standards development  Security – 911, E-911 – network – policy
  • 17. Credits: • Cisco Systems, Inc. • Telecommunications, UF. • Network Services, UF