[Cermetek]

INTRODUCTION

The CH1786 family of modems are a full function, FCC Part 68 approved 2400bps modem. These modems provide a fast, easy and flexible way to integrate a modem into any OEM product while utilizing the minimum amount of PCB space (1.01 ”x 1.27 ”x 0.52 ”). The CH1786 family only requires two external interfaces: a CCITT V.24 serial interface that can be routed directly to a UART, and a Tip and Ring interface which goes directly to an RJ-11 jack for the PSTN line connection. The CH1786 can be controlled with industry standard AT commands and, hence, is compatible with available industry communication software.

FEATURES

• Supports Standards CCITT V.22bis,V.22,Bell 212,and Bell 103

• FCC Part 68 approved and DOT CSA CS-03 Part I approvable

• UL 1950 and CSA C22.2 950 Listed

• UL File Number: E104957

• AT Command structure with extensions

• 1500 VAC RMS isolation barrier minimum, 2122V peak surge protection minimum

• Single 5 volt operation

• Low power operation with automatic reduced power standby mode

• Automatic adaptive and fixed compromise equalization

• Size: 1.01 ”x 1.27 ”x 0.52 ”(nominal)

• NVRAM allows storage of custom configurations and telephone numbers