The ZL30462 has been designed around Zarlink's Digital and Analog Phase Locked Loop (DPLL and APLL) technology and can lock to one of two inputs that can be derived from two independent sources. The inputs automatically detect if one of four frequencies is present, 8kHz, 1.544MHz, 2.048MHz or 19.44MHz. The module has three jitter attenuated output clocks one 19.44MHz (CMOS) and two 155.52MHz (LVPECL). In addition to these outputs the module also supplies an 8kHz frame pulse plus 2.048MHz, 8.192MHz and 16.384MHz clocks.