2. SG2001_VIP.ppt Page 1 PLANET Technology Corp. Product Guide 2001 VoIP Products Your Voice over Internet By Product Department

3. SG2001_VIP.ppt Page 2 The VoIP Products Product Range Product Position About the Telephony Gateway Deeper Look at the how it works

4. SG2001_VIP.ppt Page 3 Product Range Enterprise Solutions Choice for SOHO Users

5. SG2001_VIP.ppt Page 4 Enterprise Solution VIP-000 –2-slot Internet Telephony Gateway –Modules VIP-FXO: Foreign Exchange Office VIP-FXS: Foreign Exchange Station ISDN Line Module VIP-SGK –Remote Authentication System –Handle up to 48 Internet Telephony Gateway

6. SG2001_VIP.ppt Page 5 VIP-000 2-slot Internet Telephony Gateway 2-slot for module connectivity –Up to 8 channel simultaneously –Choice of modules, flexible in installation Management –Telnet/ Web manageable –Local Dial phone book –Hunt Group Support –Hot line support

7. SG2001_VIP.ppt Page 6 SOHO Solutions VIP-200 –2-port Internet Telephony Gateway –2-port FXS interface for direct analog devices VIP-400 –4-port Internet Telephony Gateway –2-port FXS interface for analog devices –2-port FXO interface for PBX/ PSTN

8. SG2001_VIP.ppt Page 7 Product Positioning VIP-000 is suitable for Small to Middle sized enterprise –8 lines can direct connect to local PBX sharing all your phone users VIP-200 is suitable for Small Home Users or Remote Branches –One phone set/ One Fax machine VIP-400 is suitable for Small offices & branches –Phone set and Fax machine –PBX and PSTN

9. SG2001_VIP.ppt Page 8 About the Telephony Gateway Concept about VIP-xxx Benefits Key Features About FXO and FXS Applications –Installation –How to make calls –How to receive calls

10. SG2001_VIP.ppt Page 9 Concepts of the Gateway The VIP-xxx is a device that convert/revert your analog voice into/from digital data Transfer you voice data through Internet Requirements –The Internet Telephony Gateway –Ethernet Networks and Router(s) to the Internet –Your existing telephone system Standards, H.323 –The standard provides a foundation for audio, video, and data communications across IP-based networks, including the Internet

11. SG2001_VIP.ppt Page 10 The Benefits Lower the PSTN cost, especially the International call Plug and Call Cooperate with existing phone system Cooperate with the TCP/IP networks and widely used OS, the Windows System Do not have to change the behavior of having a call

12. SG2001_VIP.ppt Page 11 Key Features Up to 8 Analog port for up to 8- channel in one time Choice of FXO or FXS modules for flexible installation 10/100Mbps UTP port for LAN installation Support ITU 729A/B, G723.1 G.711 for most popular ITG services in the market H.323 protocol stack compliant for Internet Telephony Applications like NetMeeting, Web Phone, etc.

13. SG2001_VIP.ppt Page 12 Key Features –ctd. GateKeeper Support for advanced management HTTP engine for web-browser management Flexible Dial Plan for speed dialing Voice Processing –Voice Activity Detection (VAD) –Comfort Noise Generation (CNG) –Hybrid Echo Cancellation (HEC) –Voice /FAX detection (T.38 fax support)

14. SG2001_VIP.ppt Page 13 About the two Interface FXO & FXS About the two –FXO: Foreign eXchange Office –FXS: Foreign eXchange Station FXO accepted connections –PBX internal line –PSTN line FXS accepted connections –PBX external line –KTS Like analog phone set / Fax machine FXO FXS

15. SG2001_VIP.ppt Page 14 Application –1 (FXS to KTS) Topic: Pure Internet Phone System for Small Office With FXS installed, up to 8 KTS (Key Telephone System) come to 8 Internet Phones FXS Internet Phone Service provider VIP-200/400

16. SG2001_VIP.ppt Page 15 Application –2 (FXS to PBX) Topic: Pure Internet Phone System for Mid-Sized Office With FXS installed, up to 8 lines can connect to the existing PBX external line for pure Internet Call Internet Phone Service provider FXS

17. SG2001_VIP.ppt Page 16 Application –3 (FXO to PBX) Topic: Pure Internet Phone System for Mid-Sized Office With FXO installed, up to 8 lines can connect to the existing PBX internal line for pure Internet Call Internet Phone Service provider FXO

18. SG2001_VIP.ppt Page 17 Application –4 (FXO to PSTN) Topic: Pure Internet Phone System for Mid-Sized Office With FXO installed, up to 8 PSTN lines can connect to the Telephony Gateway for pure Internet Call Internet Phone Service provider FXO

19. SG2001_VIP.ppt Page 18 How it works to call out - 1 Example to have a Dial base on Application 1 –Store the IP Address of Branch 1 to VIP-000, say Region 1 with number “1” –Setup the Phone number of each phone number in this branch, say from 1 to 8. –Pick up any phone in Headquarter and press “11” –The VIP-000 will find and contact with the ITG in branch and check the number “1” –Phone 1 in branch then “Rings” FXS HQ Branch 1

20. SG2001_VIP.ppt Page 19 How it works to call out - 2 Example to have a Dial base on Application 3 –Store the IP Address of Branch 1 to VIP-000, say Region 1 with number “1” –Setup the Phone number of each phone number in this branch, say from 1 to 8. –Pick up any phone in Headquarter and press, extension number for ITG, then press “11” –The VIP-000 will find and contact with the ITG in branch and check the number “1” –Phone 1 in branch then “Rings” HQ Branch 1 FXO

21. SG2001_VIP.ppt Page 20 How it works to accept a call - 1 Example to receive a call base on Application 2 –Store HQ’s IP to Branch’s IGT say Region 1 –Prefix the Region 1 with number “0”, I.e. record phone 1 to 8 in HQ with “01”, “02”... –In HQ, setup a port 1 accept “1”, 2 for “2”, etc. –Pick up the phone in branch and dial number “0106” or “0206” –Extension 106/206 in HQ then rings to indicate a call. HQ Branch 1 FXS

22. SG2001_VIP.ppt Page 21 How it works to accept a call - 2 Example to have a Dial base on Application 4 –Store HQ’s IP to Branch’s IGT say Region 1 –Prefix the Region 1 with number “0”, I.e. record phone 1 to 8 in HQ with “01”, “02”... –In HQ, setup a port 1 accept “1”, 2 for “2”, etc. –Or setup the phone number according to the area. For example, port 1, set as area code 1, and/or the accepted number 1- 8574195 –Pick up the phone in branch and dial number “018574195” –ITG will call out use number 8574195 HQ Branch 1 FXO

23. SG2001_VIP.ppt Page 22 How it works to accept a call - 3 Example to have a Dial from H.323 Application –Store the number in HQ’s ITG. –In a H.323 application like Microsoft NetMeeting, set up the H.323 gateway to the IP of the ITG in HQ. –Have a call through the gateway base on the phone number stored in the ITG –The recipient's phone should rings after the PC connect to the ITG through Internet. HQ FXO

24. SG2001_VIP.ppt Page 23 Have a deeper look Some Information for understanding the Gateway Voice Construction and transmission Voice quality Issue –Voice Codec –Delay –Jitter –Echo –Packet loss Some advanced setting for VIP- xxx

25. SG2001_VIP.ppt Page 24 Voice construction / Transmission Analog Voice to PCM –Analog voice record from the MIC of the phone set –The analog converted PCM digital stream PCM Processing –Echo remove –VAD remove silence –Forward to CODEC PCM Transfer to Frames –PCM stream fed into CODEC and frames created –Also compress PCM stream follow algorithm G.729a/b: 8Kbit per second, G.723: 5.3/6.3Kbps Frames to Packets Packet addressing and forwarding

26. SG2001_VIP.ppt Page 25 Voice Quality Issue Voice Codec Codec MIPS Frame time G.723.1* 17 30 ms G.729A 12 10 ms G.711 2 125 us 0.5 0 1.5 1.0 2.5 2.0 3.5 3.0 4.5 4.0 Mean Opinion Score kps 5.36.3864 G.723.1 (5.3 kbps) G.723.1 (6.3 kbps) G.729A G.711 * IEEE Comm. 9/97

27. SG2001_VIP.ppt Page 26 Voice Quality Issue Delay Gateway 90 ms One-WayVoice Accumulation Accumulation Voice & Protocol Processing TransmissionQueueing Jitter Remove Voice Processing 5 ms Propagation IP Network PSTN

28. SG2001_VIP.ppt Page 27 Voice Quality Issue Jitter ITG implements adaptable play-out buffer: Dynamic buffer size Large jitter buffer for fax 1 IP Network 234 1324 Variations in packet inter-arrival rate Changes in IP network load Variation in routing paths Variable queuing delays 1234

29. SG2001_VIP.ppt Page 28 Voice Quality Issue ECHO Cancelation In telephony systems line echo heard by the speaker is caused by the reflections from hybrids which convert 4 wire circuits to 2 wire circuits. PSTN requires echo cancellation when round trip delay exceeds 50 ms. Echo Hello Central Office Switch 2 wire local loop 4 wire trunks PBX 4 wire trunks

30. SG2001_VIP.ppt Page 29 Voice Quality Issue Packet Loss ITG compensate the lost packet by replaying once or twice the last frame received during the interval when the lost packet was supposed to be played out. 1 IP Network 234 5 6 1 2 34 5 6 1 1 3 4 4 6

31. SG2001_VIP.ppt Page 30 Some Advanced Setting of VIP-xxx PLAR (Private Line Auto-Ring down) –Set tcid n dial_in plar Destination Ring Frequency –Tel set ring_freq n –Tel show ring_freq Coding –Show coding n –Set coding n parameters Future Product enhancement –Impendance adjustable –Dynamic DNS

32. SG2001_VIP.ppt Page 31 Thank you!