163
Call Processing Flow Charts
PABX Trunk (Tip-Ring Loop)
PABX Trunk
(Tip-Ring Loop)
PABX draws current
on Tip-Ring wires
Turn on
Loop light
Terminal detects current,
waits programmed delay
for audio cut through
PABX
senderized?
Voice
Prompt
Send Beep
Play Overdial
Voice Prompt
No Yes
No
Accept Overdial
from caller
Reverse 48V
polarity
Turn on
Answer
light
Yes
Pulse
Digits?
DTMF?
Flash
Loop Light
Flash
Test 1, Test 2
Subscriber number
Trunk Prefix +
feed digits
Check
Subscriber
Number
End
Page
Normal Battery
on Tip-Ring
Answer &
Loop lights off
Comments to this Manuals