Comdial Executech XE 616 Key Service Unit (Refurbished)The Comdial Executech XE 616 KSU is equipped to handle 6 lines and 16 telephone capacity. More Information Access Denied Add On Conference (2 Internal, 1 External Parties) All Call Paging (via Station Speakers) AlUntercom Links Busy Indication Autodial Auto Save Feature Automatic Abandoned Hold Release Automatic Hold Transfer To Intercom Automatic Pause Insertlon Handsfree Answer inhibit Headset interface Idle Line Preference Industry Standard