A small help needed :) 

We have the following configuration for our Voip calling card business.

Opensips: Handling Authentications of users / load balancing more freeswitch servers in the future 

Freeswitch : Connected with a billing software through xml_curl Handling call and media 

Codec used:

 Between user and Our server : SILK 12k

 Between Server and outbound gateway : PCMU/PCMA

All this is hosted on a XEON e3 1230@3.2Ghz 4 cores And 8GB RAM server.

We are using Silk as we found it to be of good call quality and better on bandwith compared to PCMA/U .

My query was to know is this configuration enough to handle around 150-200 conc calls ?

I know freeswitch is capable of handling a lot more than this but we have Transcoding involved here Silk-->PCMA.

Do we have ppl here having similar configuration ? Can they please share their results about concurrent calls ? 

Thanks And regards

Mayank Nakrani