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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. Efficient use of infrastructure Cost effective (but not yet…) Ease of management

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Presentation Transcript
agenda
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
why convergence
Efficient use of infrastructure

Cost effective (but not yet…)

Ease of management

Eventual obsolescence of voice switches

Future proofing

Why Convergence?
siemens implementation of ip telephony siemens xpress

IP Telephony

Server

100mb Ethernet

IP

IP Handsets

Voice Mail

Server

Siemens implementationofIP telephony (Siemens Xpress)
how we have used ip telephony
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
lessons learned
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
future plans 1
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
future plans 2
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
lessons for it support staff
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