角色

我用中国大陆地区的中国联通3G卡，拨打VoIP电话，再加上P，然后再拨打extension，那么可以一个access number，可以转达很多不同的extension，而不用人手2次拨号，非常方便。

谢谢bubblestar兄的启蒙。


角色

角色

刚才在用GSM 3G手机，拨打我深圳的access number，用p字，然后extension，正串数字为

0755 22123456 p 8888，那么就可以接到我的Asterisk Server extension 8888，Nokia的手机可以这样，估计其他手机也可以。

这样的话，打起电话就非常方便了！


角色

角色

这次再用过载8年前买的Nokia的旧手机，但是p要用按*号键三次（快速），然后再按extension 8888，那么在拨打时，手机先拨p前面的access number，接通后再等大约3秒，手机再播出后面的extension number 8888，然后我的extension 8888就能接通。

角色

角色

For mobile phones like Nokia, which will detect if the call is connected. If the call is picked up, Nokia phone starts to make a pause of around few seconds before sending the rest of digits which may represent for PIN or extensions numbers.

However, in my old Siemens DECT phone, it does not detect if the call is picked up or not. After the last digit sent before the pause, it starts to count the pause time. Once the pause time reaches to a predefined value, it starts to send the rest of digits. This is total different from Nokia mobile phone.

YH

角色

Mobile phones like Nokia with the pause function, it may let the user store their iNum access number into their mobile phone book with the pause fucntion and followed by the iNum number that he wants to reach.

YH