there are so many factors in your setting that can affect your bandwith. for example if you are using G723r63 for one channel without AVD and I frame per packet this is what you will consume: Codec payload = 6.3K codec payload + RTP =9.6K Codec payload + RTP + UDP = 11K codec payload + RTP +UDP + IP = 17K. Total per channel. if you set your codec to 2 frames per packet the total bandwith will go down to 11K from 17K. and when you add AVD then bandwith can go down to an avarage of 4K per channell but you still need the maximum bandwidth 11K or 17K per channel depending on the number frames per packet. the advantage of AVD is that you will be able to sequeeze in more channels oan the same bandwidth. thanks Mohamed omar Nyamul Hassaan <nyamul(a)gmail.com> wrote: Hi All, Mohammed, which IP Phones are you using? There is something also I'm confused about all this Codec and bandwidth issue. I've seen that when I'm talking using my computer via a softphone, G.723 and G.729 takes approximately 24kbps and 32kbps respectively of bandwidth. But, in my terminating dedicated boxes (Quintum in my case), I see that I need to allocate only 14-15 kbps and 17-18 kbps respectively. Sometimes, total bandwidth is even less. I've a 768kbps connection from my ISP under which I'm running around 50 lines. Still, the consumption doesn't go over 600kbps even during peak hours. All my customers are using G.723r63. Any ideas on why this is happening? Regards HASSAAN On 5/27/05, Mohamed Omar <amatek2004(a)yahoo.ca> wrote:I use dialup connection with my IPPhones which has a buildin modem without any issue on both codec G723 and G729. I sometime get better quality on the some phone if I use dialup then when I was braodband. this happens when I call most aftrican country where the termination is not good. This is because when I use broadband the media has to through some kinds of NAT transval while the dialup normally gets public IP so no NAT transval and the media gets the shorts path. thanks Mohamed Jorge Crichigno <jcrichigno(a)conexion.com.py> wrote: I think the data rates with overhead are as follow: ---------------------------------------------------------------- iLBC - 30 ms (a packet each 30 ms) RTP payload: 50 bytes --> Rate: 13.3 Kbps RTP: 62 bytes UDP: 70 bytes IP: 90 bytes --> total rate: 24 Kbps ------------------------------------------------------------------- iLBC - 20 ms (a packet each 20 ms) RTP payload: 38 bytes --> Rate: 15.2 Kbps RTP: 50 bytes UDP: 58 bytes IP: 78 bytes --> total rate: 31.2 Kbps ------------------------------------------------------------------- G.729 - 2 voice frame per packet RTP payload: 20 bytes --> Rate: 8 Kbps RTP: 32 bytes UDP: 40 bytes IP: 60 bytes --> Total rate: 24 Kbps ------------------------------------------------------------------- G.729 - 4 voice frame per packet RTP payload: 40 bytes --> Rate: 8 Kbps RTP: 52 bytes UDP: 60 bytes IP: 80 bytes --> Total rate: 16 Kbps ------------------------------------------------------------------- G.711 - 20 ms (a packet each 20 ms) RTP payload: 160 bytes --> Rate: 64 Kbps RTP: 172 bytes UDP: 180 bytes IP: 200 bytes --> Total rate: 80 Kbps El vie, 27-05-2005 a las 10:36, Iqbal escribi�: _______________________________________________ Serusers mailing list serusers(a)lists.iptel.org http://lists.iptel.org/mailman/listinfo/serusers --------------------------------- Post your free ad now! Yahoo! Canada Personals _______________________________________________ Serusers mailing list serusers(a)lists.iptel.org http://lists.iptel.org/mailman/listinfo/serusers _______________________________________________ Serusers mailing list serusers(a)lists.iptel.org http://lists.iptel.org/mailman/listinfo/serusers --------------------------------- Post your free ad now! Yahoo! Canada Personals