1 / 10

VoIP Basics

VoIP Basics. -Created by VoIP-Support Team YOU Telecom India Pvt. Ltd. 1) What is VoIP ?. Voice Over Internet Protocol converts voice signals from your telephone into a digital signal that travels over internet then converts it back to voice signals at the other end so

archibald-richter
Download Presentation

VoIP Basics

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. VoIP Basics -Created by VoIP-Support Team YOU Telecom India Pvt. Ltd.

  2. 1) What is VoIP ? Voice Over Internet Protocol converts voice signals from your telephone into a digital signal that travels over internet then converts it back to voice signals at the other end so that you can speak to anyone having a regular phone no. 2) How does VoIP work? Customer will dial any no. using the phone connected to VoIP device & that call will be forwarded to our soft-switch using our network. Our soft-switch will forward the call to termination-partner using internet. Termination-partner will divert the call to PSTN in turn & the call will get connected 3) Who can provide VoIP service ? VoIP services can be provided by an ISP who had upgraded their ISP license with ITSP (Internet Telephony Service Provider) license 4) Major VoIP termination partners -Net2Phone -Vonage -Net4India

  3. 5) Protocols used in VoIP -H.323 -SIP (Session Initiation Protocol) 6) Codecs used in VoIP -Codes are mainly used for analog to digital & digital to analog conversion. We usually Support G.723.1,G.729,G.711 7) Different Types of Calling in VoIP a) PC to PC YOU Network VoIP Switch Cable Modem PC Internet PC

  4. b) PC to Phone YOU Network VoIP Switch Cable Modem PC Internet Termination Partner PSTN Phone c) Phone to Phone YOU Network VoIP Switch VoIP Device Cable Modem Phone Internet PSTN Termination Partner Phone 8) Entities involved in VoIP calling -ISP -VoIP Service Provider

  5. 9) Requirements for PC to Phone Calling(using softphone) -PC with windows based operating system -Internet on PC -Full duplex sound card -Speakers or headphone and Microphone -YOU Softphone dialer -YOU VoIP account details (User ID or Password) 10) Requirements for Phone to Phone Calling -Analog Phone Instrument -VoIP Device or IP phone -Internet connection -YOU VoIP account -Currently we are supporting SIP for VoIP services so VoIP device should be SIP based 11) VoIP Devices we are using • -Grandstream • -Cisco ATA 186 • -Linksys PAP2 • -Dlink DGP-202SP • -Audio codes 4,8 & 24 ports device • -Any industry standard device which can support SIP

  6. 12) Block Diagram

  7. 13) Basic Call Flow

  8. We need to connect the IP phone behind cable modem • IP Phone will establish a PPPoE/Static connection using cable modem with CMTS • After the connectivity device will send register request to proxy • Proxy will send back 200OK in response • After successful registration, you will get dial tone • Once you get the dial tone you can start making calls • Whenever you make any call, IP Phone will send an invite to proxy & proxy will check in its database that the sufficient balance is available in the account or not. If balance is there then call will be allowed. Proxy will reply back with 200OK • After above step proxy will forward trying to IP phone • Proxy will forward the invite for our carrier • Carrier will provide ringing • Then proxy will forward ringing to IP phone • If remote peaks up then carrier will provide 200OK • Proxy will forward 200OK to IP phone • IP phone will send ACK to proxy & proxy will forward ACK to carrier • At this step 2 two way media channel will be established between IP phone & carrier • Finally IP phone will disconnect the call & will send BYE message to proxy • Proxy will reply back with trying & forward the BYE message to carrier • Carrier will reply back with 200OK to proxy which will be forwarded to IP phone

  9. 13) Troubleshooting 1) Device based troubleshooting -No dial tone- Check for connectivity between modem & IP phone - Check for CPE behind modem - Modem is online or not - IP phone configuration -Engage tone - Check if the no. dialed is correct - Try changing the telephone instrument - Destination end problem -Voice clarity - Check for latency form CMTS to IP phone & CMTS to carrier - Check for SNR 2) Softphone based troubleshooting -Invalid UID/Password- Check if the UID/Password is correct -Call snaped/ Insufficient Fund – User doesn't have sufficient fund -Number not accessible - Check whether the no. dialed is proper or not -Call authorization failed - Check the validity of user’s account -Unable to initialize - Check if the user connected to internet & no firewall is installed on his pc. Also his ISP is not blocking TCP port 4343 & 4321 in case if he is using third party net connection -Fatal error – OS related issue, try to reinstall the dialer

  10. 14) In case of any problem you can always contact us at • E-Mail ID: voip-support@youtelecom.com • Land-line No.: +91-261-2789500 Extn.: 1650,1651,1652 • Mobile No.: +91-98790-00854 or +91-98251-00189 • VoIP No.: 9-261-16500

More Related