Function: Operator/Auto-attendant Mode Operator setting Auto-Attendant (DISA:20s three paragraphs) (TS series) Auto-Attendant (DISA-12s one paragraph) (TS series) External line caller ID Transfer Caller ID (TS series) Intercom Caller ID (TS series) Call transfer Outgoing call transfer C.O. Line Transfer to C.O. Line Call pickup Call forwarding Call all extensions Three way conference Auto IP Dialing (TS series) Call Switch (call pick during conversation) Specific CO line dialing CO line booking CO line reservation Do not disturb Multiple dial-out modes     Features: Exts. Groups External Line Group Door Phone Interface (optional for TS series) Door Opener (optional for TS series) Internal music on holding External Music Input on Holding 11 Chord Melody Music Selectable (TS series) System CRBT Call duration control Call restriction Ring identify Ringing assignment Outgoing Message Recording C.O. Line & Exts Monitor Flexible coding (change ext.No.) Automatic Ext. reporting Flash time choice Remote programming Day/Night Mode (Auto/Manual) ?? Wireless Terminal Board (optional) System Password Multiple communication lines Power failure transfer Memory protect while power off Normal transform power Switch Power (optional) Backup Battery Interface (optional) Lightning Protection   Packing Details:   Weight: 2.8~3.4kgs/pc Quantity: 5pc in one carton Giftbox size:39×29×8.5cm Carton size: 43.5×42×31.5cm