WS824(8D)-8U Product Description Capacity:Basic capacity is 8 Lines 16 Ext.can be up to 124 Lines 352 Ext or 0 Lines 480 Ext at most. Size:530*450*430(mm)&530*450*650(mm) Concrete function： 1、Full Digital Exchange and No Blocking Conversation; 2、Multi Mode of Routing Out(Can set 8 Modes of routing out at most); 3、2M(PRI)Function Board:System can Provide 120 routes with four 2M board at most; 4、Can be connected with 80 Key Phone at most; 5、Four/twelve Routes Six Sections 78s Outgoing Message; 6、Call Forwarding to Mobile Phone from Extension; 7、Built-in Caller ID for Extension Line and Outside Line; 8、Busy Tone of Co.Line Detection; 9、Co.Line Gain Adjustment(Co.Line Gain can be reached to 3dB.);