Analog subscriber internal line test function.. Subscriber line test function.. Analog terminal test function.
Trang 11 ?
a) 0 b) 2 c) 3 d) 5 2 ?
a) Redial b) Pause c) Lower d) Hold 3 ?
a)
b) dây c)
d)
4
:
a) Speaker phone b) Hands-free c) Hold d) Mute 5 ?
a)
b) 3
c)
d)
Trang 26 ?
a)
b)
c)
d)
7 ?
a) Cordlessphone b)
c)
d)
8 ?
a)
b)
c) Thay IC hold d)
9 ?
a)
b)
c) DTMF d)
10 ?
a) Extension
b) CO line
c) Keyphone
d) RS-232-C
Trang 311 ?
a)
b) - -
c)
d)
12 ?
a) Extension b) CO line c) RS-232-C d) Door phone 13 ?
a) CO b) DISA c) Keyphone
d)
14 ?
a)
b)
c)
d)
15 2 dây, 4 dây? a)
b)
c)
d)
16 ?
a) 5V
Trang 4b) 220V
c) 48V
d) -48V
17 ?
a)
b)
c)
d)
18 ?
A Analog subscriber internal line test function B Subscriber line test function C Analog terminal test function
19 ử ụ : A ỉ 1 F
F
F
D Cà a,b,c sai 20 W z VAC/ mA)? A 20Hz( 70VAC/300 mA) B 25Hz( 50VAC/ 400mA) C 20Hz( 75VAC,300mA) D 25Hz( 75VAC,400mA) 21 ụ ụ ?
A 1
B 2
C 3
Trang 5
22 W :
A ỉ ±5V
±5V 75VA
23 A " " ?
A
C Báo chuông
ậ / ã
24 A ?
A
C Báo chuông
D Báo