INTRODUCTION
The CH1804/A and CH1809/A are line status detectors that are used to detect/monitor a device off-hook condition or servered or cut telephone lines on a telephone line shared by multiple devices.

FEATURES
• FCC Part 68 approved with conveyed registration.
• Usable on public switched telephone lines and wet leased lines.
• Detects a severed telephone cable. Does not require polling.
• The "A" version detects an off-hook condition of one or more devices.
• Single in line package (SIP) requires minimum PCB area.
• Low power operation. Single 5V operation.