CPF134F is a single-line universal splitter module that has been specifically designed to implement the functionality of low pass filter in POTS/ISDN over ADSL, ADSL2 & ADSL2+ applications.

CPF134F integrates low pass filter that blocks the high frequency energy from reaching either the ISDN or the POTS device and provides isolation from impedance effects of the POTS/ISDN device on ADSL. Because the POTS/ISDN splitter connects directly to the subscriber loop media, it must also provide some protection for externally induced line hits or faults which could damage any attached equipment or endanger humans interacting with the installed equipment. The circuit protection will be provided mostly by standard customer premise line protection means and additional protection measures built into splitter to protect against line overstress which could damage the splitter itself. This splitter mainly consists of one low pass filter which provides both ISDN and POTS solution respectively. The electrical and transmission specifications are based on both ETSI TS 101 952-1-4 V1.1.1, and Telenor specification Requirements for splitter ( PSTN/ISDN basic access )