[bdNOG] Call Center Voice quality improve in public internet and call center security

Tue Nov 19 18:11:03 BDT 2013

Raskin 

Thanks for your explanation on Microtik Router . Specially on separation of the Voice traffic and Data Traffic.

With Thanks 
Emon Khastagir

----- Original Message -----From: raskin paul <raskin_ece at yahoo.com>To: Suvra Dev Kar <eng.suvra at gmail.com>, Palash Kanti Barua <palash at bol-online.com>Cc: nog at bdnog.orgSent: Tue, 19 Nov 2013 14:42:30 +0600 (BDT)Subject: Re: [bdNOG] Call Center Voice quality improve in public internet and call center security

Dear Suvro Bhai,

As per your requirement of  "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" you can simply use Mikrotik Routers where you can separate the Voice traffic and Data Traffic using Mikroitk Mangle and Queue Tree feature by giving priority to Voice Traffic over other types of traffic such as Data.

Regarding End to End path Voice QOS towards Internet really not feasible due to lots of dependency already mentioned by the senior members of bdNOG community.Everyone uses the VOIP QOS at his own network for VOIP priority.Regarding Firewalls Cisco Firewalls also can do the VOIP QOS using Express Forwarding feature by setting ef bits and inspecting RTP packets.But till now Mikrotik is the most cheap with great security solutions for VOIP packet QOS from my observation. 

Thanks

Raskin Paul
Network Support Specialist
IBM Bangladesh

 On Monday, 18 November 2013, 18:12, Suvra Dev Kar <eng.suvra at gmail.com> wrote:

Dear Mr. Palash,
Yes , you  are  right,  Provider  never  can  give  us  this  stats.  thats why maximum time  get  voice  break  issue.  SP can not ensure  QoS.
you know any  good  vendor.
Best RegardsSuvro.

On Mon, Nov 18, 2013 at 6:00 PM, Palash Kanti Barua <palash at bol-online.com> wrote:

Dear Mr. Shuvro,

You can ask your SP to ensure the following requirements for good voice quality.

1)     Packet Loss should be no more than 1% between source and destination  
2)     One-way Latency (mouth-to-ear) should be no more than 150 ms
3)     Average one-way Jitter should be targeted under 30 ms

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.

Regards,
Palash
BOL

From: Suvra Dev Kar [mailto:eng.suvra at gmail.com] Sent: Monday, November 18, 2013 3:51 PMTo: Md Zahidul HaqueCc: Jahangir Hossain; Palash Kanti Barua; nog at bdnog.org

Subject: Re: [bdNOG] Call Center Voice quality improve in public internet and call center security

Dear  Team  Member,

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. 

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.,

and  thanks  to  roman bhai, that  for  voice termination workshop agenda,. It is  very  important for  Bangladesh.

FOr  routing we  are  using  Tier 1 provider. for  compression we  are  using  20 ms payload size for  g729 call.  

Best Regards

Suvro

Helloworld Communication Ltd.

On Mon, Nov 18, 2013 at 11:35 AM, Md Zahidul Haque <zahid at zhaque.net> wrote:

Palash vai is absolutely right. 
There are lots of other factor like BW, Compression mechanism, routing mechanism etc. that can cause the poor quality of voice.

Zahidul Haque
HRC IGW

From:nog-bounces at bdnog.org [mailto:nog-bounces at bdnog.org] On Behalf Of Jahangir HossainSent: Monday, November 18, 2013 11:13 AMTo: Palash Kanti BaruaCc:nog at bdnog.orgSubject: Re: [bdNOG] Call Center Voice quality improve in public internet and call center security

1+ palash bhai.

Regards  //  Jahangir Hossain

                  Open Communication

On Mon, Nov 18, 2013 at 11:08 AM, Palash Kanti Barua <palash at bol-online.com> wrote:
Dear Mr. Suvro,Your voice traffic is passing from source to destination and vice versausing different carriers' network. So, it would be really difficult toensure End-to-End voice quality over the Internet. No one will guarantee forit. Still IPLC is the best solution for it though it is quite costly. Thereis one alternative solution is to get international MPLS connectivity if anySP can provide you the same in BD. As far as I know, there is no firewalldevice or software which can improve the voice quality over the internet.Regards,Palash Kanti BaruaBOL

-----Original Message-----From: nog-bounces at bdnog.org [mailto:nog-bounces at bdnog.org] On Behalf OfSuvra Dev Kar

Sent: Monday, November 18, 2013 12:41 AMTo: nog at bdnog.orgSubject: [bdNOG] Call Center Voice quality improve in public internet andcall center security

Dear BD  nog Team member,I  am suvro  from Hello world communications ltd.  we  are internationalcall center, we  are  using  voice  termination  through  public internet,maximum time we  face  voice quality issue. Now  can  you tel me  any onehow  i  can get  good  voice  quality  from public  internet. we  are  notusing  IPLC  coz  its costly. and tel me for  call center and  voicetermination  which  firewall  device or  software i can  use.Best RegardsSuvro DevHello world communications Ltdcell- +8801745724242._______________________________________________nog mailing listnog at bdnog.orghttp://mailman.bdnog.org/mailman/listinfo/nog_______________________________________________nog mailing listnog at bdnog.orghttp://mailman.bdnog.org/mailman/listinfo/nog

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