TN2182B Tone Clock

Integrates the tone generator, tone detection, system clock, and synchronization functions onto one circuit pack for use in standard, high, and critical reliability systems. Supports 8 ports for tone detection and allows gain or loss to be applied to Pulse Code Modulated (PCM) signals received from the bus. Provides Stratum 4 enhanced clock accuracy on any of the 256 time slots of the system’s Time Division Multiplexing (TDM) bus. Provides continuous, cadenced, and mixed tones. Allows administrable setting of tone frequency and level. Detects 2025 Hz, 2100 Hz, 2225 Hz modem answer back tones, and provides normal and wide broadband dial tone detection.