Programming by DTMF type station. Call on internal telephone set (no communication costs). Forwarding to external number or GSM (with communication cost). Beep of the double call from the board to the telephone during the communication. The item "Aiphone intercom JPTLI Telephone interface" is in sale since Monday, May 11, 2020.This item is in the category "Home & Garden\Home Improvement\Home Security\Door Entry Systems & Intercoms". The seller is "closingdow_91" and is located in Imriehel. This item can be shipped worldwide.