Release14 deployed our own Class 5 Softswitch with Lawful Interception feature included. At the time of deployment, the system consisted of 70.000 Active subscribers.
It was fully tested to cope with loads of 120cps and 12.000 active calls. Being well over the required performance threshold, it was a real treat knowing that single DELL R610 can provide all the needed power. The system was deployed in active/active load balancing configuration, and was proven to have no single point of failure.