1. Bridging Two Worlds www.citel.com Parting Is Such Sweet Sorrow: Adding IP Telephony to Existing "Big Iron" Mike Robinson CTO www.citel.com

2. Bridging Two Worlds www.citel.com Key Benefits of IP Telephony Not “one wire to the desktop.” Not 300 bells and whistles. Four Revolutionary Features: -Computer-Telephone Integration (CTI) -Unified Messaging -Telecommuter/Branch Office Support -Web Based Administration You Can Do These on a TDM PBX.

3. Bridging Two Worlds www.citel.com CTI Make your PC and Phone work together: -Click-to-Dial -Call Logging -Call Recording -Incoming Call Pop -Visual Call Control +

4. Bridging Two Worlds www.citel.com CTI on TDM PBX TDM PBX PSTN Circuit Trunks USB or RS232 CTI Adaptor CTI Adaptor Goes Between Phone and PBX, Connects to PC via USB. Also can use CTI server approach. $150 - $300 per seat.

5. Bridging Two Worlds www.citel.com CTI on IP PBX CTI is implemented via software only. TAPI driver and softphone application on PC communicate with the IP PBX over LAN. No need for TAPI adaptor hardware because the IP PBX, PC, and phone all speak IP. Trunk Gateway Trunks IP PBX PC with Softphone & TAPI PSTN LAN 1010 TAPI Interface Software within IP PBX

6. Bridging Two Worlds www.citel.com Unified Messaging Single System for Voice, Fax & E-Mail -See All Mail In One In-Box -Listen to Voice Mail via PC -Hear E-Mail via Phone -Respond to Voice Mail w/ E-mail and vice versa (reduce call-backs!) -Forward and Folder Voice Mail w/ E-Mail

7. Bridging Two Worlds www.citel.com Unified Messaging on TDM PBX External UM Server attaches via station ports. Requires station card in PBX plus voice cards in PC plus (sometimes) external adaptor and/or serial data link from PBX. Requires engineering effort for each model PBX. TDM PBX PSTN Circuit Trunks Voice Adaptors UM Server

8. Bridging Two Worlds www.citel.com Unified Messaging on IP PBX Unified Messaging is implemented in software only. IP PBX runs on standard server OS (UNIX, LINUX, Win2K) so UM can run on the same server. Or UM runs on its own server and communicates via an IP standard. No adaptors needed. Trunk Gateway Trunks IP PBX PC with UM Client PSTN LAN 1010 UM Server Software On IP PBX Server

9. Bridging Two Worlds www.citel.com Telecommuter/Branch Support (a.k.a. “Voice VPN”) Enable PBX stations to be deployed over IP WAN or Internet. -Part or Full-Time Telecommuters -Small Branch Office to Metro Hub -Distributed Call Center -Toll By-Pass -Coordinated Dialing Plan

10. Bridging Two Worlds www.citel.com Voice VPN on TDM PBX TDM PBX PSTN Circuit Trunks Remote Access Remote Access Adaptor Connects to PBX and to phone at other side of WAN. IP Trunk Adaptors Provide Toll By-Pass & Dialing Plan WAN or VPN WAN or VPN IP Remote Access IP Trunk Adaptor RAA Telecommuter IP T. A. Branch PBX/KTS

11. Bridging Two Worlds www.citel.com Voice VPN on IP PBX IP PBX and IP phones are already WAN- enabled. No need for more adaptor hardware. Trunk Gateway Trunks IP PBX PSTN LAN WAN or VPN WAN or VPN Telecommuter LAN

12. Bridging Two Worlds www.citel.com Web-Based Administration Open PBX Administration to Mere Mortals -Reduce Training For PBX Admin -Customer Self-Administration for MAC -User Self-Administration (speed dial programming, call routing capabilities) -Combined Admin of PBX, LAN, E-mail…

13. Bridging Two Worlds www.citel.com Web-Based Admin on TDM PBX Administration Server Connects to PBX via Administration Link, Provides Web Interfaces and Unified Administration TDM PBX Circuit Trunks Admin Link Admin Server PSTN

14. Bridging Two Worlds www.citel.com Web-Based Admin on IP PBX IP PBX runs on standard server OS (UNIX, LINUX, Win2K) so web server is built right in! Admin software just uses standard web application tools to control the various IP PBX settings Trunk Gateway Trunks IP PBX PC with Browser PSTN LAN 1010 Admin Server Software On IP PBX Server

15. Bridging Two Worlds www.citel.com Eventually You’ll Want All These -Computer-Telephone Integration (CTI) -Unified Messaging -Telecommuter/Branch Office Support -Web Based Administration

16. Bridging Two Worlds www.citel.com Having It All on TDM PBX TDM PBX Circuit Trunks Remote Access What’s wrong with this picture?? Who is being difficult? WAN or VPN WAN or VPN IP IP Trunk Adaptor RAA Telecommuter IP T. A. Branch PBX/KTS Admin Link Admin Server PSTN Voice Adaptors UM Server CTI Adaptor

17. Bridging Two Worlds www.citel.com The Problem is the PBX In a traditional PBX, the call control application is “locked” inside a proprietary platform, and tied to the media switching fabric. Other applications can’t communicate easily. TDM PBX Circuit Trunks Call Control PSTN

18. Bridging Two Worlds www.citel.com Having It All on an IP PBX In an IP PBX, the call control application is separated from the switching fabric and becomes a typical data application on a standard server platform. Advanced software applications like CTI, UM, Telecommuter Support, and Web Admin are built in and can run on the same server platform. All the applications communicate in an IP structure. BUT it’s a total system replacement. Expensive! Trunk Gateway Trunks IP PBX Plus Applications PSTN LAN WAN or VPN WAN or VPN LAN

19. Bridging Two Worlds www.citel.com Having It All via Handset Gateways Move to an IP PBX, Keep Your Phones Other Side Provides Power and Protocol Mapping to Existing PBX Handsets One Side of Handset Gateway Has IP Interface to the IP Call Control Device IP Centrex Service Provider SIP IP PBXs 3Com, Cisco, etc.

20. Bridging Two Worlds www.citel.com Having it All via Handset Gateways A Handset Gateway converts your existing PBX telephones into IP phones without doing a LAN upgrade or buying new phones. Can mix-and-match legacy digital phones with IP phones and migrate over time. Get the benefits of IP Telephony without the forklift upgrade. Trunk Gateway Trunks IP PBX Plus Applications PSTN LAN WAN or VPN WAN or VPN LAN

21. Bridging Two Worlds www.citel.com Summary -IP Telephony Supports Applications -These Enhance User Productivity -You Can Do The Applications on TDM -Just Surround the PBX with Adaptors -You Can Migrate to an IP PBX -Get All the Apps by Replacing Everything -Or Migrate to IP, but Keep Your Phones -Get the Apps Without Replacing Everything

22. Bridging Two Worlds www.citel.com Q & A www.citel.com