Table 8: Direct Inward Dial/Loop Trunk Summary - Mitel SX-200 EL Technician's Handbook

Technician's Handbook

Table 8: Direct Inward Dial/Loop Trunk Summary

Signal
Seize
Seize
Acknowledgment
Digits
Stop Dial
Receipt of Digits
Answer
Supervision
Disconnect
Supervision
76
DID/Loop Trunk PBX
Outgoing
Tip-Ring leads are activated
(shorted); Loop Current flows
in line
Immediate Dial - Tip-Ring
leads stay active
Outgoing Wink - Tip-Ring
leads toggle
Loop Current direction Delay
Dial - Tip-Ring leads reverse
Loop Current following
seizure; reverse again when
ready to go
Loop Current toggled
(Rotary) or DTMF
Tip-Ring leads reverse Loop
Current direction; forward
again when ready
Audible Tones - Busy,
Reorder, Ringback
dependent upon digits dialed
and called party condition
Current flow in Tip-Ring is
reversed
Near or Far-end termination:
Loop Current broken
DID/Loop Trunk PBX
Incoming
Tip-Ring leads are
activated (shorted); Loop
Current flows in line
Immediate Dial - Tip-Ring
leads stay active.
Incoming Wink - Tip-Ring
leads toggle Loop Current
direction
Loop Current toggled
(Rotary) or DTMF
-
Audible Tones - Busy,
Reorder, Ringback
generated and sent to
calling party dependent
upon digits received and
state of called party
Current flow in Tip-Ring is
reversed
Near or Far-end
termination: Loop Current
is broken