Telecommunication Industry in India is growing fast. The performance Indicators released by (TRAI, Nov 2009), are encouraging. In India currently there are 525.65 million telephone subscribers. The teledensity recorded ending oct 2009 was 44.87.Out of 525.65 million subscribers 488.40 million subscribers have subscribed wireless services and 37.25 million wire line services. The subscriber base for wireline is on decresing trend. The Study was conducted for wireline segment.In the study it was found out that due to various issues related to Quality, Deliverables, Time and cost over runs; there is a decreasing trend in the subscriber base. It was also found out that Competence Level of manpower has great Impact on the success of a wireline telecommunication Project. Since Telecommunication Service providers outsource network construction, Service delivery, service assurance to vendors, success mostly depends upon the competence level of the manpower working for that project. The mathematical model suggests that Skill sets of the manpower have the maximum impact on the Project deliverables, Time over runs and cost over runs. Another mathematical model suggests that for Quality, it is not only skill sets or attitude but Knowledge also has the maximum impact. Correlation analysis between Competence level of manpower and Project success has come to be 0.23 which is positive but its degree of association is very weak. It may be concluded that in addition to manpower competency other resources like Machines, Materials and Money play important role in the success story of a wire line telecommunication Project. Training and development programs for vendor manpower should be top priority for the vendors as well as the the Telecommunication service provider.