Mitel SX-200 EL Technician's Handbook page 90

Technician's Handbook
Table 9: E&M Trunk Summary (Continued)
Signal
Digits
Stop Dial
Receipt of Digits
Answer
Supervision
Disconnect
Supervision
Test/Verify (E&M)
Loop back to self whenever more than 1 E&M type V circuit is available.
Verify far-end circuits by activating near-end M lead and listening for far-
end dial tone.
Verify near-end circuits by activating near-end E lead and listening for
near-end dial tone.
Verify that appropriate voltages are present on E&M leads in each call
state.
80
E&M Trunk PBX
Outgoing
M toggles (Rotary) or DTMF
through audio path
E lead goes active; goes
inactive when ready to go
Audible Tones - Busy,
Reorder, Ringback
dependent upon digits
dialed and called party
condition
E lead goes active
Near-end termination: M
lead goes inactive; E follows
Far-end termination: E lead
goes inactive; M follows
E&M Trunk PBX
Incoming
E toggles (Rotary) or DTMF
through audio path
-
Audible Tones - Busy,
Reorder, Ringback
generated and sent to
calling party dependent
upon digits received and
called party condition
M lead goes active
Near-end termination: M
lead goes inactive; E follows
Far-end termination: E lead
goes inactive; M follows
(Sheet 2 of 2)