An inband interoffice address signal method in which ten decimal digits and five auxiliary signals are each represented by selecting two frequencies out of the following group: 700,900,1300,1500,and 1700Hz。; 一种带内局间地址信号表示方法,此方法中所用的10个十进制数字和5个辅助信号中的每 一个都由700,900,1300,1500和1700赫兹这一组频率中选出的两个频率来表示。