To provide level-1 Active O&M services like fault monitoring & management. Managed Network services include Troubleshooting of BTS using OMT, Fault localization, replace faulty hardware units, test calls, test external alarms and antenna system test,Troubleshooting of T1/E1 link to bring site on air, Periodic drive testing of BTS Site, Verification, up-gradation / replacement of cards / devices, Firmware / hardware modification for cards / devices locally, Oversee replaced units, Logistics and documentation support for repair & return of faulty hardware units.