Media bypass allow the Skype for Business client leveraging on G.711 ulaw and a direct connection to the associated Session Boarder Controller with CCE.
Where is the advantage not letting the client connect to the Mediation Server component in the CCE?
This is clearly not an advantage yet for leveraging the a distributed SBC deployment, where the client will be redirected via SIP Re-Invite to a possible close PSTN connection. Saying you have a central CCE with one SBC in Munich and one in Malaysia, but in Malaysia you didn't deploy a second CCE site.
Here the client can't not reconnect to the far SBC.
But the media bypass advantage lays clearly in increasing a CCE concurrent call volume. Meaning the CCE can connect the call to the called CORE SBC and the CORE SBC handles call routing to other locations. This allows you to operate beyond the concurrent call limit of 500. If the SBC can handle more than 500 call simultaneously, the client has a direct connection to this SBC and this SBC routes the call to other SBC, which might be distributed across different locations. This will clearly save money.
Media Bypass is only available, if your SfB client is internal. External clients run through the Edge and Mediation Server, hitting the SBC. Routing on the SBC will still apply.
Example:
The advantage is clearly on the higher load a CCE an take, while the CORE SBC handles the Client Connections and reroute to the Sub-SBCs.
Important is, you must consider the network delay within your calculation.
Configuring Media Bypass on a CCE Site:
Set-CsTenantHybridConfiguration -HybridConfigServiceInternalUrl http://newname.domain/hybridconfig/hybridconfigservice.svc
$mediabypass = New-CsNetworkMediaBypassConfiguration -AlwaysBypass $true -Enabled $trueSet-CsNetworkConfiguration -MediaBypassSettings $mediabypass
Technet reference:
https://technet.microsoft.com/de-de/library/mt808734.aspx
https://technet.microsoft.com/en-us/library/mt605227.aspx
https://technet.microsoft.com/de-de/library/mt808733.aspx
Note:
Clients will receive the web address of Media bypass web service from an internal DNS server. The name of the web service will be the same across all instances and Cloud Connector PSTN sites. In complex multisite environment, we recommend using Windows 2016 DNS Policy for Geo-Location Based Traffic Management, so clients can be redirected to web service which is local for their network.
More about Windows 2016 DNS Policy for Geo-Location Based Traffic Management can be found on the following link https://docs.microsoft.com/en-us/windows-server/networking/dns/deploy/primary-geo-location