Sigma has cultivated over 30 partnerships with leading vendors in the broadband IP and wireless sectors. Two of Sigma’s most strategic relationships are with industry giants Nortel and Cisco. To ensure the broadest interoperability, Sigma also works with other leading equipment vendors, including Lucent, Motorola, Arris, Broadsoft, Siemens and BigBand.

To deliver powerful joint solutions, Sigma has partnered with software vendors like Radialpoint, Synacor, Camiant, RIM, Mpathix, and OpenWave. Sigma also works with CSG Systems, AMDOCS and Convergys for tight interoperability with major billing and customer care systems.

To enhance its professional services, Sigma occasionally taps firms like Accenture, CGI, Computaris, and BearingPoint.