AT&T SYSTEM 25 Manual page 26

To make an outside call, the user either dials the Automatic Route Selection (ARS) access
code or the pooled facility, then after second dial tone, the rest of the desired outside
number. If all trunks in the selected group are busy, and the calling station is administered
for automatic queuing for outside calls, queuing tone is returned to the caller. If automatic
queuing is not administered, the caller hears fast busy tone but can queue the call by the
appropriate manual method.
To be eligible for queuing when not using ARS, a trunk group must be
NOTES:
administered to allow queuing by dial access users.
Dialing the complete outside number is required, even if all trunks are busy; this
ensures that no redialing is necessary for the queued call.
Reorder tone is also returned if the busy trunks are not administered for dial-access
queuing or if all queue slots are in use. In these cases, queuing cannot take place.
Multiline
Calls originating on PERS LINE, FACILITY, FLEX DSS, or DSS buttons cannot be queued.
Requesting
Callback
1
Press
The light next to the button on which you had placed the call winks.
2
Listen for queuing tone and then hang up.
NOTE:
accepted for this call.
the Call
Completing
If you did not hang up after placing the callback request, you will hear dequeuing tone when
the call can be completed.
1
When you hear priority ringing, lift the handset.
2
Listen for dequeuing tone.
Your call will now be completed as dialed.
.
[ R E C A L L ]
If you do not hear queuing tone, your request has not been
Callback Request (Callback Queuing)
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