Cp-416/832: Feature 1. Three paragraph of computer operator\'\'s voice 2. Fsk/dtmf sender chip inside, co line cid can be transferred from one extension to another freely 3. Co line monitor 4. Outgoing call restrict range 5. Trunk line transfer to trunk line,3-party conference call 6. Call splitting and call forwarding 7. Auto transfer to another when transfer to a busy extension 8. External music input 9. Day/night mode with real time clock 10. Use PC to program, compatible with cdx1000 PC manager system Cs-308/416 Feature 1. Mini fashing design 2. Transferred cid system 3. Door phone interface 4. Internal ringing identify 5. Remote programming 6. Flexible call setting 7. Keep settingdata while power off