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Phone
1
Ring /
Dial tone
--
Call waiting tone
--
Phone
2
--
Ring /
Dial tone
--
Call waiting tone
2.
Two data connections up
Two data connections could be to the same destination or to different destination. Therefore, we
discuss two different cases here.
(1)
Both channels are connected to user’s ISP. When a voice incoming call to any DN, one data
connect will be bumped, and the corresponding phone will ring. After user answer the call, if
another voice incoming call to that DN, user will hear call waiting tone and able to flash to
answer the 2
nd
incoming call.
CASE 1: Call to DN1 first.
Action 1
Action 2
Action 3
Call to DN1 /
Offhook phone 1
Call to DN2 /
Offhook phone2
call to DN1
Phone
1
Ring /
Dial tone
--
Call waiting tone
Phone
2
--
Caller get busy tone
/ Busy tone
--
CASE2: Call to DN2 first
Action 1
Action 2
Action 3
Call to DN2 /
Offhook phone 2
Call to DN1 /
Offhook phone1
call to DN2
Phone
1
--
Caller get busy tone
/ Busy tone
--
Phone
2
Ring /
Dial tone
--
Call waiting tone
(2)
Two channels are connected to different Remote Nodes, such as one to ISP and one to user’s
office network. A voice incoming call to any DN will get busy tone.