Huawei soft switch

NGN internship PTCL

Ewsd

Bearer control protocol

Ptcl call setup between different exchanges

Khalid sarwar working principle of ewsd exchange 2014

Khalid sarwar digital concepts of transmission and switching 2014

Signaling and protocol management

Dss1 signaling

Ptcl ngn rwp team travel to musa ka musalla in 2013

Khalid sarwar working principle of zte exchange 2014