Products Customer Service Support What's New How to Buy About Us Job Opportunities Clearance Items ©2008 Cortelco, Inc. Home > Products > Conference Telephone Conference Telephone Model: CONF410PAK CONF410MIC (Optional External Microphone) Downloads Conference Phone Specification Sheet Conference Phone Manual Features: Full-Duplex Speaker Phone On/Off with LED Mute with LED Ringer - Hi/Lo/Off Seven-Step Volume Control Redial Flash Tone/Pulse External Microphone (Optional) - Provides Two-Color LED (In-Use & Mute Indication) One External Microphone Connection (for Optional Microphone)