TMC 4-Line Intercom Speakerphone - Replaces the ET4000 (4300 adds built-in features that had to be modules on the 4000 and a few cosmetic differences) - AND YES IT IS COMPATIBLE WITH THE ET4000- 4 Lines and up to 16 extensions- Caller ID, call waiting caller ID (on all 4 lines)- 50# Caller ID history- Caller ID display dial- 3-Way conferencing- Call timer- 5# Redial- Do not disturb- Toll restriction- Call privacy on/off- Automatic line selection- 28# Memory dial in each phone- 10# Private directory- Memory retained during power loss- Separate volume controls (handset, speakerphone, and headset)- Line reserve- Intercom- Paging- Call transfer- Speakerphone- Telco visual message indicator for all four lines- Backlit large LCD - Three softkeys for easy display-guided programming- Headset jack - Built-in headset amplifier and dedicated headset button- Data/fax jack- Shared directory holds 40 names and numbers- Advanced intercom - Off-hook voice announce- Busy lamp field- Dual color line status indication- Distinctive ringing for each line- 2 Year limited manufacturer's warranty- Customer support line: 1-800-TMC-1638TMCET4300
