INTRODUCTION
The Cermetek CH1837A/F Data Access Arrangement (DAA) is designed to meet the performance requirements of 33.6Kbps modems, such as V.34bis, for embedded applications. The CH1837A/F meets or exceeds the requirements for V.34 and can be used in lower speed applications as well. The isolation voltage and surge protection meets, as a minimum, North American UL1950 Edition 3 (USA) and CSA C22.2 950 (Canada) requirements. Further, the CH1837A/F has been tested to meet FCC Part 68 and is Canadian DOT CSA CS-03 Part I approvable.

FEATURES
• Low Profile
• Complete DAA function
• Compatible with most popular V.34bis modem chip sets
• Ring detection circuitry included
• Built-in 2-wire to 4-wire conversion circuitry (CH1837A/F only)
• UL1950 Edition 3 Listed and CSA C22.2 950 Compliant
• 1500 VAC RMS Isolation
• 2122V peak surge protection
• +5V low power operation
• Differential transmission, VoIP applications
• Compatible with V.34bis, V.32bis, V.32, V.22bis, and V.22
• FCC Part 68 (USA) and DOT CSA CS-03 Part I (Canada) Approvable