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Leveraging IP Telephony: Implementation Challenges and Future Strategies at Oxford

This document outlines the implementation of IP telephony using Siemens technology at Oxford, highlighting lessons learned, current usage, and future plans. Key insights include the cost-effectiveness of infrastructure, management ease, and eventual obsolescence of traditional voice switches. The document discusses niche locations, bandwidth usage, and user preferences. Challenges such as standards and cost issues are addressed, alongside future strategies for phased implementation. It serves as a guide for IT support staff on integrating innovative telephony solutions while preparing for upcoming technologies.

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Leveraging IP Telephony: Implementation Challenges and Future Strategies at Oxford

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  1. Why Convergence? Siemens Implementation of IP Telephony How we have used IP telephony in Oxford Lessons learned Plans for the future Lessons for IT Support staff Agenda

  2. Efficient use of infrastructure Cost effective (but not yet…) Ease of management Eventual obsolescence of voice switches Future proofing Why Convergence?

  3. IP Telephony Server 100mb Ethernet IP IP Handsets Voice Mail Server Siemens implementationofIP telephony (Siemens Xpress)

  4. Transparent usage of voice network: Full DX functionality (groups, diversions etc) Integrated numbering scheme Integrated voice mail Niche locations: New buildings (Begbroke Science Park – 48 lines, Kemp Hall Bindery - 40 lines) Remote but on data network Uncertain growth rate, 30 lines now – 400 when? How we have used IP telephony

  5. Bandwidth usage is trivial (<64k per call) Quality of transmission can be good Softphone not suitable for all users Most users want a “real” phone Expensive at the moment Lack of (or too many!) standards Lessons Learned

  6. Not yet a general strategic solution – standards? cost issues ? Check other suppliers (Cisco, Nortel, Mitel etc.) Closer cooperation between OUTN, OUCS & IT staff Future Plans 1

  7. Phased Implementation Strategy: IP Trunking to link exchanges- 2002/3? More niche installations – 2002-6? Broader implementations on greenfield sites e.g. Begbroke, Churchill Hospital – 2003-6? Replacement of telephone exchanges - 2006/7? Future Plans 2

  8. Prepare now! Cabling – flood wire with Cat 5 Quality of Service (standards!) Maintenance/Management issues Learning curve - Diffserv, 802.1D(p), 802.1Q, 802.3af, G.711, G.723.1, H323, SIP ad nauseam Lessons for ITSupport Staff

  9. Ian’s Pipe Dream

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