Forum Discussion

thet naing's avatar
thet naing
Iron Contributor
May 13, 2017

SFB Bandwidth Calculation Made Easy

We have always been asked "how much WAN bandwidth is required for SFB based on X numbers of users" ? If we didn't set required and expected bandwidth right for customers, I am very sure you will persistently hear "poor Audio/Video quality and performance" from them. 


It's critical that we have a base bandwidth requirement stipulated and aligned customer's expection from the very beginning to ensure that customer is fully aware of how much bandwidth SFB will potentially consume based on a number of combined scenarios and to determine if a customer's current network meets calculated SFB bandwidth requirement. 


I devised a very concrete and verifiable bandwidth requirement calculator for that. I don't mean this to be a laser-like-precision or military-grade-precision, but I did design this calculator to have a micro-torch-like-precision with continuous improvements along the way.

 
Whenever we meet with customers, we would be able to calculate SFB bandwidth requirement confidently and comfortably using this excel-based calculator.  Please stress to customers that this calculation is "only and strictly for SFB" - No other traffics are considered.


I made this calculator extremely simple and easy to use while maintaining accuracy. All you need to do is just "select number of concurrent users in respective scenarios" and you are done - nothing could be simpler than that. 

SFB Bandwidth Calculator Download link: 

https://gallery.technet.microsoft.com/SFB-Bandwidth-Calculation-32f7f6e3 

 

PS: You should always recommend customer to implement QoS in their network for better A/V quality as well. I wrote a guide on "QoS in SFB Made Easy" here  https://gallery.technet.microsoft.com/QoS-in-SFB-Made-Easy-and-d7ffa783 


Any feedbacks, please contact me at thetnaing@thetnaing.com.

Cloud PBX
PSTN Calling
Skype for Business Adoption
Skype Operations Framework
Voice

7 Replies

  • Martin Goth's avatar
    Martin Goth
    Copper Contributor
    Oct 02, 2018

    Hi, just wondering if bandwidth with ip/ethernet overhead is calculated? Is ask because in the SFB Calculator is see 65 kbits as assumed bandwidth for G 711. But including overhead this should be 90?

  • Genga_Mani's avatar
    Genga_Mani
    Copper Contributor
    May 14, 2017

    This is really great!

    thet naing wrote:

    SFB Bandwidth Calculation Made Easy

    We have always been asked "how much bandwidth is required for SFB based on X numbers of users"?
    If we didn't set required and expected bandwidth right for customers, I am very sure you will consistently hear "poor Audio/Video quality and performance" from them. 

     

    It's critical that we have a base bandwidth requirement stipulated and aligned customer's expection from the very beginning, to ensure that customer is fully aware of how much bandwidth SFB will potentially consume based on a number of combined scenarios and to determine if a customer's current network meets SFB bandwidth requirement. 

     

    I devised a very concrete and verifiable bandwidth requirement calculator for that. I don't mean this to be a laser-like-precision or military-grade-precision, but I do design this to have a micro-torch-like-precision with continuous improvements along the way.

     
    Whenever we meet with customers, we would be able to calculate SFB bandwidth requirement confidently and comfortably using this excel-based calculator.  Just don't forget to stress that this calculation is "only and strictly for SFB" - NOT all other traffics are considered.

     

    I made this calculator extremely simple and easy to use while mainting accuracy. All you need to do is just "select number of concurrent users in respective scenarios" and you are done - nonthing could be simpler than that.

    Bandwidth Calculator Download link 

    https://gallery.technet.microsoft.com/SFB-Bandwidth-Calculation-32f7f6e3  

     

    PS: You should always recommend customer to implete QoS in their network for better A/V quality as well. I wrote a guide on "QoS in SFB Made Easy" here  https://gallery.technet.microsoft.com/QoS-in-SFB-Made-Easy-and-d7ffa783 

     

Resources