随着通信建设的飞速发展,许多中小企业拆掉了本单位的电话交换机,集体加入了市公网电话,享受虚拟网特殊待遇,即用户可拨双重号码,对公网使用7位(或8位)大号,对本单位内部通话则使用4位小号(大号的后4位),并享受内部通话不计费的优惠政策。一般企业 With the rapid development of communications construction, many small and medium-sized enterprises have demolished the telephone exchanges of their own units and have collectively joined the public telephone network of the public and enjoyed the special treatment of the virtual network. That is, the users can dial a dual number and use 7 (or 8 Bit) large, the internal use of this unit calls 4 trumpet (queen of 4), and enjoy the internal calls without preferential policies. General business