CMX612
Calling Line Identifier
with VMWI
D/612/3 February 2002
Advance Information
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
Applications
•
CLI and CIDCW Adjunct Boxes
•
CLI and CIDCW Feature Phones
•
Computer Telephone Integration
•
Call Logging Systems
•
Voice-Mail Equipment
1.1
Brief 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, it 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. The device 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
µController.
It is suitable for use in systems to BT specifications SIN227 and SIN242, Bellcore GR-30-CORE and SR-
TSV-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.
©
2002 Consumer Microcircuits Limited
CMLMICRO [ CML MICROCIRCUITS ]
