The system returns several different call progress signals to the CO in the interval after it receives address
signalling and before it answers. It does this within 1.5 seconds after completion of address signalling.
Line Busy Tone: This tone indicates called station is busy or already being alerted by another call.
Reorder Tone: This tone indicates that the call cannot be completed due to:
blocking or lack of equipment,
an incomplete (partial dial) address is received.
Audible Ringing Tone: This tone indicates that the station is being alerted or that a recorded announcement will
follow. The ring back will precede the actual alerting of the station to assure that the caller always hears some
portion of the ring back tone.
When a called station answers, the DXP Plus sends answer supervision to the CO by applying reverse polarity to
the line. This polarity reversal is maintained until either the station goes on-hook or the CO opens the loop. The
DXP Plus establishes a communication path between the line and station when it detects station answer.
The CO signals a line disconnect condition to the DXP Plus by opening the loop. When the DXP Plus detects the
CO disconnect, it returns the line to idle polarity and changes the line from busy to idle.
The DXP Plus signals a line disconnect condition to the CO by returning the supervision battery polarity to the
on-hook state. Wink and delay start lines maintain the busy status until the DXP Plus detects CO release. After
disconnect, the DXP Plus returns to the idle state and is ready to process the next call.
With the Wink Start line, the DXP Plus acknowledges that is ready to receive addressing digits from the CO by
giving a momentary reversal of polarity after it has successfully allocated the resources.
With the Delay Start line, the DXP Plus reverses polarity upon notification from the CO of the pending
incoming call, then acknowledges that is ready to receive addressing digits by returning the polarity back to the
idle state after it has successfully allocated the resources.
With the Immediate Start line, there is no acknowledgment from the DXP Plus that it is ready. It is best to
only use this method if the system is set for pulse (rotary) dialing on the line.
Installing The DID Line Board
IMI89–191
Installing The DID Line Board – 3
Содержание DXP Plus Series
Страница 1: ...Digital Communications System R ...
Страница 363: ...Automatic Call Distributor Technical Manual R QuickQ DXP ...
Страница 424: ...Automatic Call Distributor System Manager s Guide R QuickQ DXP ...
Страница 500: ...Wrap up Time 1 6 Wrapping Up A Call 4 3 Z Zoom Box A 2 GCA70 271 Index I 3 ...
Страница 628: ...Interconnecting The VMI X Installing And Programming For ExecuMail IMI89 206 Installing And Programming For ExecuMail 5 ...
Страница 677: ...Connecting The Equipment Installing And Programming The OPX X IMI89 209 Installing The OPX X 7 ...
Страница 728: ...DP I I I I and FX Series Digital Communications Systems Understanding The Visual Man Machine Interface COMDlA ...
Страница 1112: ...9 08 8 90 1 13 4 78 3 94 UNIS029 TAB003 PLS page 6 GCA40 130 DXP Plus General Description 11B Telephone Features ...