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</o:shapelayout></xml><![endif]--></head><body bgcolor=white lang=EN-US link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif"'>Dear Aniruddha Da,<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif"'>I’m NOT clear about “</span><b><span style='font-size:11.0pt;font-family:"Calibri","sans-serif"'>SLA with the SP</span></b><span style='font-size:11.0pt;font-family:"Calibri","sans-serif"'>”. Please help understand this.<o:p></o:p></span></p><div><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif"'>And what will be basic parameters of this types of SLA. SP can provide the best route to any customer based on destination and lowest latency and it is suitable when destination is fixed or known.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif"'>But, as I assume, for call canter, calling destination and call originating source is ANY. In that case, how SP can provide suitable solution.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif"'>But I believe, there might be others technique. Please share for our understanding.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#002060'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#002060'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#0000CC'>Regards, </span><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif";color:#0070C0'>Farid</span><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#002060'><o:p></o:p></span></p></div><div><div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in'><p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'> nog-bounces@bdnog.org [mailto:nog-bounces@bdnog.org] <b>On Behalf Of </b>Aniruddha Barua<br><b>Sent:</b> 21-Nov-2013 12:16 AM<br><b>To:</b> Simon Sohel Baroi / IIG-ITC / Sr.Manager / 01678618243 /; Nurul Islam Roman<br><b>Cc:</b> nog@bdnog.org<br><b>Subject:</b> Re: [bdNOG] Call Center Voice quality improve in public internet and call center security<o:p></o:p></span></p></div></div><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><span style='font-size:10.0pt'>Dear Simon bhai, Roman bhai and other members, <br><br>Thanks for your emails. I kind of predicted it right. The more we go towards the core of global Internet, the less (or none as you've confirmed) bandwidth management & traffic shaping we see. <br><br>Actually I am not asking anything for our network. Our current total bandwidth is 300 Mbps (through 4 IIGs) and we are doing fine with our current bandwidth management mechanism. Besides we do not have any Call Center as our customer at the moment. Some of our corporate customers use International Video Conferencing (BTRC authorized of course) among multiple countries simultaneously. They never reported any performance issue. <br><br>I was looking at the original issue posted by Mr. Suvro Dev in a larger view. Let's see this, <br><br>OrigSite----ISP----UpstreamISP----TransitProv----TransitProv----TransitProv-----UpstreamISP----ISP----TermSite <br><br>A typical end-to-end path looks more or less like above where traffic shaping is taking place at ISP and/or UpstreamISP. If there is any bottleneck in any of the TransitProvs, then ISPs and UpstreamISPs will have to escalate the issue to concerned TransitProv. My experience tells that unless there is a DoS/DDoS attack, most of the time the bottleneck will go away on its own by the time (or even long before) the TransitProvs get the message. <br><br>As far as ISP/UpstreamISP of TermSite (i.e. Hello World Comm. Ltd. here) is concerned, Mr. Suvro can take the advices of the experts and seniors earlier in this mailing list, esp. Palash Da's advices. Go for an SLA with the SP. <br><br>Regarding Simon bhai's experience with Juniper device, I just remembered a quote by Sir W. Churchill, "If you place over 10,000 regulations, you ultimately destroy all respect for the law." The packets rebelled against the thousands of featured regulations of Juniper and destroyed it. ;-) <br><br>Best regards, <br><br><br>ANIRUDDHA BARUA <br>Email: <a href="mailto:aniruddha.barua@colbd.com">aniruddha.barua@colbd.com</a>, <a href="mailto:cto@colbd.com">cto@colbd.com</a> <br><br><br><b>---------- Original Message -----------</b> <br>From: "Simon Sohel Baroi / IIG-ITC / Sr.Manager / 01678618243 /" <<a href="mailto:simon.baroi@fiberathome.net">simon.baroi@fiberathome.net</a>> <br>To: Nurul Islam Roman <<a href="mailto:nurul@apnic.net">nurul@apnic.net</a>> <br>Cc: Aniruddha Barua <<a href="mailto:aniruddha.barua@colbd.com">aniruddha.barua@colbd.com</a>>, "<a href="mailto:nog@bdnog.org">nog@bdnog.org</a>" <<a href="mailto:nog@bdnog.org">nog@bdnog.org</a>> <br>Sent: Wed, 20 Nov 2013 23:02:07 +0600 <br>Subject: Re: [bdNOG] Call Center Voice quality improve in public internet and call center security <br><br>> Dear Anirudda Da, <br>> <br>> Thanks for your mail. If I'm wrong I think you are asking how bandwidth can be controlled in large level. <br>> <br>> I have a very small experience in IIG. We do the bandwidth shaping in physical level as port basis. We don't do anything on Packet level as like Roman Vai said. But, all our cards are QUE cards. These QUE cards are very expensive, but it will give you a very good result on shaping bandwidth at the port. If you have more than 1gbps of Bandwidth to serve, I think you can use Aggregated Ethernet (AE). Better to use 80% efficiency for each port. <br>> <br>> For Packet Shaping, I have a very worst experience on JUNIPER IDP 8200, which is a 10GE transparent DPI. It should give us so many options to control the packets, like blocking, passing etc. But, truly speaking your browsing experience will be too much worst and when we crossed 1 gbps of bandwidth it crashed and JUNIPER send a new one. <br>> <br>> - SIMON. <br>> <br>> On Wed, Nov 20, 2013 at 7:15 PM, Nurul Islam Roman <<a href="mailto:nurul@apnic.net" target="_blank">nurul@apnic.net</a>> wrote: <br>> <o:p></o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt'><br>> <br>> Transit operators normally do not shape traffic (bandwidth control) at packet level. Except some rate limiting for ICMP etc etc destine to their origin IP only. They normally control data rate at the signal level I.e. DSL, Ethernet, STM etc. So at the packet level there is no issue as long as their interface queue (depend on hardware capacity) can handle those. <br>> <br>> Transit path main goal is clear IP packet, no shaping, their routers don't even check what QoS tag each packet is carrying. If you need any exception it need to be done case by case with your transit operator/s. <br>> <br>> Regards <br>> <br>> -R <br>> <br>> <br>> <b>From: </b>Aniruddha Barua <<a href="mailto:aniruddha.barua@colbd.com" target="_blank">aniruddha.barua@colbd.com</a>> <br>> <b>Date: </b>Wednesday, 20 November 2013 10:31 PM <br>> <b>To: </b>"Simon Sohel Baroi / IIG-ITC / Sr.Manager / <a href="tel:01678618243" target="_blank">01678618243</a> /" <<a href="mailto:simon.baroi@fiberathome.net" target="_blank">simon.baroi@fiberathome.net</a>> <br>> <b>Cc: </b>"<a href="mailto:nog@bdnog.org" target="_blank">nog@bdnog.org</a>" <<a href="mailto:nog@bdnog.org" target="_blank">nog@bdnog.org</a>> <br>> <br>> <b>Subject: </b>Re: [bdNOG] Call Center Voice quality improve in public internet and call center security <br>> <br>> Dear Simon bhai, <br>> <br>> I am not asking for our network. I am asking from learning point of view. ISPs like us use Allot, Packeteer, ET, MikroTik etc. I was wondering what the carriers/transit providers might use to shape up QoS for IP traffic (VoIP, IP Telephony, Video etc.). International calls pass through one or more of these transit networks. If end to end QoS has to be ensured along the path, transit providers will have to use such an equipment at IP level. I feel, at Gigabit speeds, shaping up traffic without compromising performance should be extremely difficult. I think, from transit providers' point of view, IPLC is the best option for best QoS but I might be wrong. Inputs from the experts in this list are welcome. <br>> <br>> Regards, <br>> <br>> <br>> <br>> <br>> ANIRUDDHA BARUA <br>> Email: <a href="mailto:aniruddha.barua@colbd.com" target="_blank">aniruddha.barua@colbd.com</a>, <a href="mailto:cto@colbd.com" target="_blank">cto@colbd.com</a> <br>> <br>> On Nov 20, 2013, at 2:22 PM, "Simon Sohel Baroi / IIG-ITC / Sr.Manager / <a href="tel:01678618243" target="_blank">01678618243</a> /" <<a href="mailto:simon.baroi@fiberathome.net" target="_blank">simon.baroi@fiberathome.net</a>> wrote: <br>> <br>> <o:p></o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt'><br>> <br>> Dear Aniruddha Da, <br>> <br>> Can you please explain where you want to use this equipment. Are you want to use it in your ISP to serve client and control them from a central point. <br>> <br>> Please let us know a bit of details about it. <br>> <br>> - with regards <br>> <br>> SIMON <br>> <br>> FiBER@HOME. <br>> <br>> On Wed, Nov 20, 2013 at 2:06 PM, Aniruddha Barua <<a href="mailto:aniruddha.barua@colbd.com" target="_blank">aniruddha.barua@colbd.com</a>> wrote: <br>> <o:p></o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt'><br>> Hello everyone, <br>> <br>> Relating to this thread, I'd like to know if there is any equipment that can shape up QoS traffic without affecting Non-QoS traffic at carrier networks where bandwidth is in hundreds of Mbps to tens of Gbps. <br>> <br>> Regards, <br>> <br>> ANIRUDDHA BARUA <br>> Email: <a href="mailto:aniruddha.barua@colbd.com" target="_blank">aniruddha.barua@colbd.com</a>, <a href="mailto:cto@colbd.com" target="_blank">cto@colbd.com</a> <br>> <br>> <b>---------- Original Message -----------</b> <br>> From: Suvra Dev Kar <<a href="mailto:eng.suvra@gmail.com" target="_blank">eng.suvra@gmail.com</a>> <br>> To: Palash Kanti Barua <<a href="mailto:palash@bol-online.com" target="_blank">palash@bol-online.com</a>> <br>> Cc: <a href="mailto:nog@bdnog.org" target="_blank">nog@bdnog.org</a> <br>> <br>> Sent: Mon, 18 Nov 2013 18:11:31 +0600 <br>> Subject: Re: [bdNOG] Call Center Voice quality improve in public internet and call center security <br>> <br>> > Dear Mr. Palash, <br>> > <br>> > Yes , you are right, Provider never can give us this stats. thats why maximum time get voice break issue. SP can not ensure QoS. <br>> > you know any good vendor. <br>> > <br>> > Best Regards <br>> > Suvro. <br>> > <br>> > On Mon, Nov 18, 2013 at 6:00 PM, Palash Kanti Barua <<a href="mailto:palash@bol-online.com" target="_blank">palash@bol-online.com</a>> wrote: <br>> > <o:p></o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt'><br>> > <br>> > Dear Mr. Shuvro, <br>> > <br>> > You can ask your SP to ensure the following requirements for good voice quality. <br>> > <br>> > 1) Packet <b>Loss</b> should be no more than <b>1%</b> between source and destination <br>> > 2) One-way <b>Latency</b> (mouth-to-ear) should be no more than <b>150</b> ms <br>> > 3) Average one-way <b>Jitter</b> should be targeted under <b>30</b> ms <br>> > <br>> > If you use Ethernet connection and G.729 at 50 pps with 20 ms sampling rate, you need at least 37 kbps bandwidth for each call. Please correct me if I am wrong. <br>> > <br>> > <br>> > Regards, <br>> > Palash <br>> > BOL <br>> > <br>> > <b>From:</b> Suvra Dev Kar [mailto:<a href="mailto:eng.suvra@gmail.com" target="_blank">eng.suvra@gmail.com</a>] <br>> > <b>Sent:</b> Monday, November 18, 2013 3:51 PM <br>> > <b>To:</b> Md Zahidul Haque <br>> > <b>Cc:</b> Jahangir Hossain; Palash Kanti Barua; <a href="mailto:nog@bdnog.org" target="_blank">nog@bdnog.org</a> <br>> > <br>> > <b>Subject:</b> Re: [bdNOG] Call Center Voice quality improve in public internet and call center security <br>> > <br>> > <br>> > <br>> > Dear Team Member, <br>> > Thanks For your Suggestion. I know voice quality can not improve using any firewall. firewall and voice quality is both are different. i saw if network any firewall have which is create problem for voice termination. but firewall is important to secure the network. i want to know any device which can support voice termination. <br>> > and for voice quality issue i am not interest to get IPLC, without IPLC how i can get good voice quality from public internet in Bangladesh. any one have any Band width which can defer voice traffic and data traffic when it is going through any pipe link. coz voice traffic will be priority in public internet, how i can do this, or who can give this type of service., <br>> > <br>> > <br>> > and thanks to roman bhai, that for voice termination workshop agenda,. It is very important for Bangladesh. <br>> > <br>> > FOr routing we are using Tier 1 provider. for compression we are using 20 ms payload size for g729 call. <br>> > <br>> > <br>> > <br>> > <br>> > Best Regards <br>> > Suvro <br>> > Helloworld Communication Ltd. <br>> > <br>> > <br>> > <br>> > On Mon, Nov 18, 2013 at 11:35 AM, Md Zahidul Haque <<a href="mailto:zahid@zhaque.net" target="_blank">zahid@zhaque.net</a>> wrote: <br>> > <br>> > Palash vai is absolutely right. <br>> > There are lots of other factor like BW, Compression mechanism, routing mechanism etc. that can cause the poor quality of voice. <br>> > <br>> > Zahidul Haque <br>> > HRC IGW <br>> > <br>> > <b>From:</b> <a href="mailto:nog-bounces@bdnog.org" target="_blank">nog-bounces@bdnog.org</a> [mailto:<a href="mailto:nog-bounces@bdnog.org" target="_blank">nog-bounces@bdnog.org</a>] <b>On Behalf Of </b>Jahangir Hossain <br>> > <b>Sent:</b> Monday, November 18, 2013 11:13 AM <br>> > <b>To:</b> Palash Kanti Barua <br>> > <b>Cc:</b> <a href="mailto:nog@bdnog.org" target="_blank">nog@bdnog.org</a> <br>> > <b>Subject:</b> Re: [bdNOG] Call Center Voice quality improve in public internet and call center security <br>> > <br>> > <br>> > <br>> > 1+ palash bhai. <br>> > <br>> > <br>> > <br>> > Regards // Jahangir Hossain <br>> > <br>> > Open Communication <br>> > <br>> > <br>> > On Mon, Nov 18, 2013 at 11:08 AM, Palash Kanti Barua <<a href="mailto:palash@bol-online.com" target="_blank">palash@bol-online.com</a>> wrote: <br>> > Dear Mr. Suvro, <br>> > <br>> > Your voice traffic is passing from source to destination and vice versa <br>> > using different carriers' network. So, it would be really difficult to <br>> > ensure End-to-End voice quality over the Internet. No one will guarantee for <br>> > it. Still IPLC is the best solution for it though it is quite costly. There <br>> > is one alternative solution is to get international MPLS connectivity if any <br>> > SP can provide you the same in BD. As far as I know, there is no firewall <br>> > device or software which can improve the voice quality over the internet. <br>> > <br>> > Regards, <br>> > Palash Kanti Barua <br>> > BOL <br>> > <br>> > -----Original Message----- <br>> > From: <a href="mailto:nog-bounces@bdnog.org" target="_blank">nog-bounces@bdnog.org</a> [mailto:<a href="mailto:nog-bounces@bdnog.org" target="_blank">nog-bounces@bdnog.org</a>] On Behalf Of <br>> > Suvra Dev Kar <br>> > <br>> > Sent: Monday, November 18, 2013 12:41 AM <br>> > To: <a href="mailto:nog@bdnog.org" target="_blank">nog@bdnog.org</a> <br>> > Subject: [bdNOG] Call Center Voice quality improve in public internet and <br>> > call center security <br>> > <br>> > Dear BD nog Team member, <br>> > <br>> > I am suvro from Hello world communications ltd. we are international <br>> > call center, we are using voice termination through public internet, <br>> > maximum time we face voice quality issue. Now can you tel me any one <br>> > how i can get good voice quality from public internet. we are not <br>> > using IPLC coz its costly. and tel me for call center and voice <br>> > termination which firewall device or software i can use. <br>> > <br>> > Best Regards <br>> > Suvro Dev <br>> > Hello world communications Ltd <br>> > cell- <a href="tel:%2B8801745724242" target="_blank">+8801745724242</a>. <br>> > _______________________________________________ <br>> > nog mailing list <br>> > <a href="mailto:nog@bdnog.org" target="_blank">nog@bdnog.org</a> <br>> > <a href="http://mailman.bdnog.org/mailman/listinfo/nog" target="_blank">http://mailman.bdnog.org/mailman/listinfo/nog</a> <br>> > <br>> > _______________________________________________ <br>> > nog mailing list <br>> > <a href="mailto:nog@bdnog.org" target="_blank">nog@bdnog.org</a> <br>> > <a href="http://mailman.bdnog.org/mailman/listinfo/nog" target="_blank">http://mailman.bdnog.org/mailman/listinfo/nog</a> <br>> > <br>> > <br clear=all><br>> > -- <br>> > <br>> > <br>> > <br>> > <br>> > <br>> > <br>> > <br>> > _______________________________________________ <br>> > nog mailing list <br>> > <a href="mailto:nog@bdnog.org" target="_blank">nog@bdnog.org</a> <br>> > <a href="http://mailman.bdnog.org/mailman/listinfo/nog" target="_blank">http://mailman.bdnog.org/mailman/listinfo/nog</a> <br>> > <o:p></o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt'><br>> <b>------- End of Original Message -------</b> <br>> <br>> _______________________________________________ <br>> nog mailing list <br>> <a href="mailto:nog@bdnog.org" target="_blank">nog@bdnog.org</a> <br>> <a href="http://mailman.bdnog.org/mailman/listinfo/nog" target="_blank">http://mailman.bdnog.org/mailman/listinfo/nog</a> <br>> <br>> <o:p></o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt'><br>> <br clear=all><br>> -- <br>> </span><b><span style='font-size:7.5pt;font-family:"Tahoma","sans-serif"'>Simon Sohel Baroi </span></b><span style='font-size:7.5pt;font-family:"Tahoma","sans-serif"'>| Sr. Manager, Technology | PICO | ITC - </span><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>IIG |</span><span style='font-size:7.5pt;font-family:"Tahoma","sans-serif"'> <br>> Cell : <a href="tel:%2B880-1678-618243" target="_blank">+880-1678-618243</a>, <a href="tel:%2B880-181-7022207" target="_blank">+880-181-7022207</a> | Desk : <a href="tel:%2B880-9666776677%20Ext-1031" target="_blank">+880-9666776677 Ext-1031</a> | </span><span style='font-size:10.0pt'> <br>> </span><span style='font-size:7.5pt;font-family:"Tahoma","sans-serif"'>Mail : <a href="mailto:simon.baroi@fiberathome.net" target="_blank">simon.baroi@pico.net.bd</a> | Skype : tx.fttx | <br>> <br>> <span style='color:#006600'><br>> <br>> <b><i>Reduce. Reuse. Recycle. Respect. It's the little things that really can make a difference. <br>> </i></b></span></span><span style='font-size:10.0pt'><o:p></o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt'><br>> _______________________________________________ <br>> nog mailing list <br>> <a href="mailto:nog@bdnog.org">nog@bdnog.org</a> <br>> <a href="http://mailman.bdnog.org/mailman/listinfo/nog" target="_blank">http://mailman.bdnog.org/mailman/listinfo/nog</a> <br>> <br>> <o:p></o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt'><br>> <br clear=all><br>> -- <br>> </span><b><span style='font-size:7.5pt;font-family:"Tahoma","sans-serif"'>Simon Sohel Baroi </span></b><span style='font-size:7.5pt;font-family:"Tahoma","sans-serif"'>| Sr. Manager, Technology | PICO | ITC - </span><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>IIG |</span><span style='font-size:7.5pt;font-family:"Tahoma","sans-serif"'> <br>> Cell : +880-1678-618243, +880-181-7022207 | Desk : +880-9666776677 Ext-1031 | </span><span style='font-size:10.0pt'> <br>> </span><span style='font-size:7.5pt;font-family:"Tahoma","sans-serif"'>Mail : <a href="mailto:simon.baroi@fiberathome.net" target="_blank">simon.baroi@pico.net.bd</a> | Skype : tx.fttx | <br>> <br>> <span style='color:#006600'><br>> <br>> <b><i>Reduce. Reuse. Recycle. Respect. It's the little things that really can make a difference. <br>> </i></b></span></span><span style='font-size:10.0pt'><br><b>------- End of Original Message -------</b> </span><o:p></o:p></p></div></body></html>