Brief Description
The CMX878 is a line-powered multi-standard modem for use in telephone based information and telemetry systems. It provides the building blocks for interfacing to the telephone line without the need for a transformer - this is the Data Access Arrangement (DAA) – allowing for the coupling of data signals to and from the line; it can also detect Ringing and Line Reversals.

FEATUREs
• V.22bis, V.22, Bell 212A, V.23/Bell 202, V.21/Bell 103 modulation schemes
• DTMF/Tones Transmit and Receive
• Line Reversal and Ring Detection
• Regulated Power taken from Line
• Gyrator and Impedance Matching Control
• Parallel Phone Detection
• Low Power Operation and Standby

APPLICATIONs
• Line Powered Applications
• EPOS Terminals
• Remote Utility Meter Reading
• Security Systems
• Telephone Telemetry Systems
• ATMs
• Pay-Phones
• E-mail Terminals