Switching systems and Call Centers
SIB - Wake up service system

Call Centers
Since 1990-ties IRITEL produced systems for PSTN subscribers special services – call centers.
Several types of systems were produced, depending on technical and technological factors, user demands, etc. These systems are: NIPS (universal services), SIT (directory services), SIB (wake up service), and FPC (flexible universal system).
SIB basic features