Alcatel-Lucent Systems Engineer interview questions

I applied for the post by sending my CV and covering letter. After couple of weeks a phone interview was setup. Two of the hiring manager conducted the interview and it lasted for about 40 minutes. I was asked questioned solely based on my CV. I had to explain my dissertation work and why I chose to go for this topic. They asked me about my assignment work, pulse shaping filter, noisy channel. After the phone interview I was asked to come to their Swindon office for a face to face interview. A HR personnel took a 10 minutes competency based interview. She asked me about the company, my future aspirations, team-work experience etc. The same two hiring manager took the interview again and asked me similar questions from my CV along with job specific questions. Questions were asked about LTE network architecture, technological specifications and about femto cell simulation in C. They reimbursed my travel expences which was about 40 GBP. They got back to me after one and half months saying I was not successful on this occasion.

should be thorough in c c++ networks