si 2415 modem使用中的问题。

wuyusiwei

si 2415 modem使用中的问题。 [复制链接]

使用si 2415 拨打电话。
I find that modem dial the first telephone number slowly to be responsed .

for exmple:

Tel number is "4403".

I send the first number "ATDT4",  I can not hear the response sound util passing about 3 seconds.  why it delay 3 seconds? but response sound can be heared immediately when I send the last number (403).

请问此问题应该如何解决呢？谢谢。