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LUẬN VĂN VIỄN THÔNG NGHIÊN CỨU CÔNG NGHỆ VOIP VÀ THIẾT KẾ CẤU TRÚC MẠNG VOIP ĐƠN GIẢN

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0
1
2
3
4
5
6
18-Oct-
99
22-Nov-
99
10-Dec-
99
12-Jan-
99
04-Apr-
00
Registered users (million)
0
50
100
150
200
250
300
350
Call minutes (million)

Users
minutes
Cumulative number of Dialpad users and call minutes
Since launch on 18 Oct. 1999

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T1519120-95
state
macro call
signal from protocol
user

signal to protocol user
local signal received
local signal sent
message received
message sent
macro definition
task
decision
text
text extension
comment

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