USB Skype adapter
"##" to enter three-way call.
"00":
1.
If there is an incoming call while a conversation is in
progress, user may press "00" to stop the alert tone
(incoming call will be rejected) and continue the current
conversation.
2.
If a conversation is progress while another call is put
on-hold, press "00" to end the call that is put on hold and
continue the current conversation.
"000":
1.
During three-way call, press "000" to end connections to
all parties.