Hybrid key telephone systems: D848:4+16 extendable to 8+48; D168:4+56 extendable to 16+128; D288:16+56 extendable to 32+256; Main features: Account code entry... Automatical re-dial... Automatical call back... Back-up battery... Charge system& PC port... Co to co with password... Class of services... Call transfer... Call pickup... Call hold retrieve... Call hold return tone... Call waiting signal... Call forward on busy... Call forward when no-answer... Call forward directly... Call duration restriction... Call splitting... Day/night services... Disa... Direct dialing-out... Double-color light... Do not disturb... Date& time setting... External music... Exclusive line(s)... Extension password... Extendable by card... Hot dialing... IP dialing... Intercom caller id& transfer... Interrupt an existing call... Incoming ringing delay... Intercom call transfer... Music-on-hold... No-answer return tone... One-touch dialing... Ringing pattern selection... Paging... Setting operator... Trunk number integrated... Volume adjustment... Voicemail Compatible Wake-up call... 3-duration ogm... 3-minutes alarm... 3~8-parties conference call... 2,3,4-digital number coding... 1~12 pt available... Price terms: L/c, t/t Quantity: Negotiable Packaging: Export cartons