Mitel SX-200 EL, Technician'S Handbook

Page: 90 / 262

Technician’s Handbook
80
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.
Digits M toggles (Rotary) or DTMF
through audio path E toggles (Rotary) or DTMF
through audio path
Stop Dial E lead goes active; goes
inactive when ready to go -
Receipt of Digits Audible Tones - Busy,
Reorder, Ringback
dependent upon digits
dialed and called party
condition Audible Tones - Busy,
Reorder, Ringback
generated and sent to
calling party dependent
upon digits received and
called party condition
Answer
Supervision E lead goes active M lead goes active
Disconnect
Supervision Near-end termination: M
lead goes inactive; E follows
Far-end termination: E lead
goes inactive; M follows Near-end termination: M
lead goes inactive; E follows
Far-end termination: E lead
goes inactive; M follows
Table 9: E&M Trunk Summary (Continued)
Signal
E&M Trunk PBX
Outgoing
E&M Trunk PBX
Incoming
(Sheet 2 of 2)