
17
Action 1
Action 2
Call to DN2 /
Offhook phone 2
Call to DN1 /
Offhook phone1
Phone
1
--
Call waiting tone /
Dial tone
Phone
2
Caller get busy tone
/ Busy tone
--
(2)
phone 2 (DN2) is used to connect to “peer”, and then a data call is triggered to ISP (DN1).
Action 1
Action 2
Call to DN1 /
Offhook phone 1
Call to DN2 /
Offhook phone2
Phone
1
Caller get busy tone
/ Busy tone
--
Phone
2
--
Call waiting tone /
Dial tone