The VIAVI Solutions HST-3000-SIM-T1-T3 Service Interface Module is a T1/T3 service interface accessory for the HST-3000 cable tester, enabling direct T1 and T3 testing from the instrument. It adds dedicated T1 and T3 test interfaces to the HST-3000 platform, supporting telecom verification workflows. Use with the HST-3000 cable tester to perform T1 and T3 line tests in network characterization and fault isolation tasks.
