INTRODUCTION
The CH2100 is a full function, fully approved V.22bis 2400bps modem module. It is hermetically encapsulated and has a footprint that is less than one square inch. This makes the CH2100 unique in size, performance and reliability. The CH2100 interfaces directly to the telephone line utilizing its built in PSTN line interface. The modem is completely intelligent and is controlled by and will communicate via the five volt serial transmit and receive data pins exclusively. The CH2100 uses the standard AT commands and status words for command and control. No additional external pin connections are required.

GENERAL DESCRIPTION
The CH2100 has very few external pins (when compared to conventional modems) making the CH2100 extremely easy to interface to the user’s application hardware. Unique to the CH2100 archeitecture is the assumption that an intelligent host is processing the transmit and receive data, providing the AT commands for control and interpretting the status information supplied by the CH2100.

FEATURES
• Supports Standards CCITT V.22bis, V.22, Bell 212, and Bell 103
• FCC Part 68 approved and CSA CS-03 Part I approvable
• AT Command structure - with extensions
• 1500VAC RMS isolation barrier, 2122V peak surge protection
• Single 5 volt operation
• Low power operation with automatic reduced power standby mode
• Automatic adaptive and fixed compromise equalization
• Test modes and diagnostics
• Size: 0.86”x1.10”x0.53” (nominal)
• Fully encapsulated
• UL1950 and CS22.2 950 compliant approval pending
• Extended Temperature: -40°C to 85°C