The IL2411 is a bipolar integrated circuit designed for telephone bell replacement.

• Designed for Telephone Bell Replacement
• Low Current Drain
• Adjustable 2-frequency Tone
• Adjustable Warbling Rate
• Extension Tone Ringer Modules
• Alarms or Other Alerting Devices
• Adjustable for Reduced Supply Initiation Current.
• Built-in hysteresis prevents false triggering and rotary dial ‘Chirps’