Sabir Ahmed Khan is a Technical Lead with over 7 years of experience in testing protocols like SIP, ISUP, and Diameter. He has expertise in technologies such as IMS, VoIP, NGN, and PSTN. Some of his responsibilities include setting up test environments, performing feature testing, regression testing, identifying defects, and performing root cause analysis. He is currently working with Mitel in Bangalore, India as a Technical Lead performing RMS testing.