Nokia-Siemens Networks (NSN) has entered into an equipment supply contract with Serbia-based mobile operator Telekom Srbija. As per the deal, NSN will implement Telekom Srbija’s GSM network extension and 3G WCDMA network with HSPA functionality. The deal requires NSN to supply 3G-based radio and core equipment (mobile softswitching solution consisting of mobile switching centre servers and media gateways) to the Serbian operator.