CMX612

Features:

CLI, CIDCW and VMWI System Operation
CLASS (FSK) and SDT (Stuttered Dial Tone)
Low Power Operation 0.5mA at 2.7V
Zero-Power Detector for Ring or Line Reversal
Low CAS Tone Falsing in CIDCW Mode
Bellcore, ETSI, BT and Mercury Compatible




Application

CLI and CIDCW Adjunct Boxes
CLI and CIDCW Feature Phones
Computer Telephone Integration
Call Logging Systems
Voice-Mail Equipment




Specifications






Description

The CMX612 is a low power CMOS integrated circuit for the reception of physical layer signals used in British Telecom's Calling Line Identification Service (CLIP), Bellcore's Calling Identity Delivery system (CID), the Cable Communications Association's Caller Display Services (CDS) and similar evolving systems. It also meets the requirements of emerging Caller Identity with Call Waiting services (CIDCW).
In addition, CMX612 provides Visual Message Waiting Indicator (VMWI) detection in both CLASS (FSK) and (SDT) Stuttered Dial Tone modes. Two different signal inputs are provided to the device, to support Tip/Ring and Hybrid connectivity. CMX612 includes a 'zero-power' ring or line reversal detector, a dual-tone (2130Hz plus 2750Hz) Tone Alert Signal detector, a dual-tone (350Hz plus 440Hz) stuttered dial tone detector and a 1200-baud FSK V23/Bell202 compatible asynchronous data demodulator with a data retiming circuit which removes the need for a UART in the associated mController.
CMX612 is suitable for use in systems to BT specifications SIN227 and SIN242, Bellcore GR-30-CORE and SRTSV-002476, CCA TW/P&E/312, ETSI ETS 300 659 parts 1 and 2, ETS 300 778 parts 1 and 2 and Mercury Communications MNR 19.