After installing the whole system, now is time to start a stress test to check your configuration. We will use the SIPp utility to test our system. Before we use SIPp it is important to recognize helpful tools such as openserctl moni, openserctl online, and the SipTrace module. Packet capturing tools are used on a daily basis in a voice provider, so we will need to learn how to use Wireshark, Tshark, and ngrep. Later we will check sipsak, which calls itself a Swiss army knife for SIP. We can use it along with Nagios and Monit to monitor OpenSER.