slide 7 signaling Flashcards
1
Q
where is a class 4 switch
A
tandem switch
2
Q
funciton of class 3 switch
A
switching long distance calss
3
Q
where are IMT trunk
A
between class 3 LD switches
4
Q
where feature group D trunnks created
A
allow equal access and billing without
having to dial a LD access code
5
Q
what geernates dial tone
A
class 5 switch
6
Q
loop start voltage
A
In idle state 48V is on Ring and 0V is on Tip, w
hen
phone goes off hook the loop completes and the switch detects
the current and sends the dial tone
7
Q
DTMF
A
sends digits to switch
