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)
Содержание SX-200 EL
Страница 1: ...TECHNICIAN S HANDBOOK LIGHTWARE 19 RELEASE 3 0 ...
Страница 11: ...Chapter 1 Introduction ...
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Страница 32: ...Technician s Handbook 22 ...
Страница 33: ...Chapter 2 Routine Maintenance ...
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Страница 55: ...Chapter 3 Troubleshooting and Repair ...
Страница 56: ...Technician s Handbook 46 ...
Страница 88: ...Technician s Handbook 78 Figure 16 E M Trunk Type I 2 wire ...
Страница 110: ...Technician s Handbook 100 ...
Страница 111: ...Chapter 4 Programming ...
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Страница 169: ...Chapter 5 Installation ...
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Страница 175: ...Installation 165 Installation SX 200 ML FD Cabinet Card Assignment Figure 24 SX 200 ML FD Cabinet Card Assignment ...
Страница 176: ...Technician s Handbook 166 SX 200 LIGHT Cabinet Card Assignment Figure 25 SX 200 LIGHT Cabinet Card Assignment ...
Страница 239: ...Chapter 6 Maintenance Commands ...
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Страница 258: ...Technician s Handbook 248 ...
Страница 261: ...Notes ...
Страница 262: ...Technician s Handbook Notes ...