AT&T 75 Telephone User Manual


 
CHAPTER 3. OPERATING THE CONSOLE
8. To abandon the call attempt, press (Release).
Call progress tones stop.
• Atnd lamp and the display go dark.
• Pos Avail lamp lights.
Procedure complete.
Calls to Outside Numbers
An outside call requires an outgoing trunk as well as dialing of the distant number. You can
access a trunk in two ways:
1.
Dial an access code for a Private Network, Automatic Alternate Routing (V2, V3, and
Generic 1 systems), Automatic Route Selection, or a specific trunk group.
2. Press the Trunk Group Select button for the desired trunk.
To call an outside number:
1.
Decide whether to access an outgoing trunk by dialing a code (Steps 2 and 3) or by
using a Trunk Group Select button (Steps 4 and 5).
2.
Press
(Start).
Dial tone.
• Atnd lamp at idle call appearance button lights.
Pos Avail lamp goes dark.
3. Dial the trunk access code, and listen for call progress tone.
Second dial tone—valid code; go to Step 6.
Reorder tone—no outgoing trunk available; go to Step 8 or 9.
Intercept tone—invalid code; go to Step 8 or 9.
4. Check the status of the Trunk Group Select lamps.
No lamps lighted—trunk available; go to Step 5.
Busy lamp lighted—all trunks in the group are busy; try again later.
• Warn lamp lighted—some trunks are busy; select an alternate trunk group if
possible, or go ahead and use this group per Step 5.
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