Patent US5195131A successfully refreshed from Google Patents.
US5195131A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Private branch exchange system
Assignee: Toshiba Corp
•
Filing: 1991-02-04
•
Granted: 1993-03-16
•
Expires: 2011-02-04
Abstract
Abstract A private branch exchange system having a call forward busy function wherein, when a busy incoming-call destination terminal receives a further incoming call, the further incoming call is informed to both of the busy incoming-call destination terminal and a forwarding destination terminal previously set for the busy incoming-call destination terminal. Since a response opportunity to the further incoming call is provided even when the initially-intended incoming-call destination terminal is busy, the response opportunity of the busy incoming-call destination terminal and the forwarding destination terminal to the incoming call can be increased and therefore an incoming-call response rate of the entire system based on the call forward busy function can be increased.
Inventors
- 👤 Toshiyuki Sano
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 14:17
CPC Classifications
H; H04; H04Q; H04Q3/00; H04Q3/58; H04Q3/62; H04Q3/625; H04M; H04M3/00; H04M3/42; H04M3/46; H04M3/465; H04M3/54; H04M3/546; H04M3/428
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
240 words
A private branch exchange system having a private branch exchange, the exchange comprising: an incoming call destination terminal for receiving a new incoming call; memory means for storing data identifying at least one forwarding destination terminal to which a new incoming call for a busy incoming-call destination terminal is to be forwarded; judgement means for judging whether or not at least one forwarding destination terminal is set for the busy incoming-call destination terminal when the busy incoming-call destination terminal receives the new incoming call; forwarding means for forwarding the new incoming call for the busy incoming-call designation terminal to the forwarding destination terminal when the forwarding destination terminal is previously set for the busy incoming-call destination terminal; alarming means for generating an alarm at the busy incoming-call destination terminal to indicate the presence of the new incoming call simultaneously with the forwarding of the new incoming call to the forwarding designation terminal by the forwarding means; response recognition means for recognizing a response of the incoming-call destination terminal or the forwarding destination terminal to the alarm issued from the alarming means or the call forwarded to the forwarding destination terminal; and response control means for connecting the terminal responding to the forwarded call or the alarm to an extension line or a central office line associated with the incoming call and for immediately stopping forwarding of the incoming call to or generating the alarm from the terminal not responding thereto.
Claim 2
Dependent Claim
240 words
A private branch exchange system having a private branch exchange, the exchange comprising: an incoming call destination terminal for receiving a new incoming call; memory means for storing data identifying at least one forwarding destination terminal to which a new incoming call for a busy incoming-call destination terminal is to be forwarded; judgement means for judging whether or not at least one forwarding destination terminal is set for the busy incoming-call destination terminal when the busy incoming-call destination terminal receives the new incoming call; forwarding means for forwarding the new incoming call for the busy incoming-call designation terminal to the forwarding destination terminal when the forwarding destination terminal is previously set for the busy incoming-call destination terminal; alarming means for generating an alarm at the busy incoming-call destination terminal to indicate the presence of the new incoming call simultaneously with the forwarding of the new incoming call to the forwarding designation terminal by the forwarding means; response recognition means for recognizing a response of the incoming-call destination terminal or the forwarding destination terminal to the alarm issued from the alarming means or the call forwarded to the forwarding destination terminal; and response control means for connecting the terminal responding to the forwarded call or the alarm to an extension line or a central office line associated with the incoming call and for immediately stopping forwarding of the incoming call to or generating the alarm from the terminal not responding thereto.
Claim 3
Dependent Claim
45 words
A private branch exchange system as set forth in claim 1, wherein the incoming-call destination terminal is a multi-function telephone set and the alarm issued when the incoming-call destination terminal is busy is indicated by means of a lamp, alarm tone sounding or both thereof.
Claim 4
Dependent Claim
46 words
A private branch exchange system as set forth in claim 1 or 2, wherein, when a plurality of forwarding destination terminals are set for the busy incoming-call destination terminal, the new incoming call is forwarded to the plurality of forwarding destination terminals at the same time.
Claim 5
Dependent Claim
51 words
A private branch exchange system as set forth in claim 1 or 2, wherein, when a plurality of forwarding destination terminals are set for the busy incoming-call destination terminal, the forwarding of the new incoming call is carried out sequentially with time with respect to the plurality of forwarding destination terminals.
Claim 6
Dependent Claim
62 words
A private branch exchange system as set forth in claim 1 or 2, wherein, when the forwarding destination terminal is set in such a chain manner that another forwarding destination terminal is repetitively set for the already-set forwarding destination terminal, the forwarding of the new incoming call is carried out with respect to the respective forwarding destination terminals at the same time.
Claim 7
Dependent Claim
61 words
A private branch exchange system as set forth in claim 1 or 2, wherein, when the forwarding destination terminal is set in such a chain manner that another forwarding destination terminal is repetitively set for the already-set forwarding destination terminal, the forwarding of the new incoming call is carried out sequentially with time with respect to the respective forwarding destination terminals.
Claim 8
Dependent Claim
57 words
A private branch exchange system as set forth in claim 1 or 2, wherein control of the judgement means, the forwarding means, the alarming means, the response recognition means and the response control means is activated either for an incoming call received from an extension line or for an incoming call received from a central office line.
Claim 9
Dependent Claim
177 words
A private branch exchange system having a private branch exchange, the exchange comprising: an incoming-call destination terminal for receiving a new incoming call; memory means for storing data identifying at least one forwarding destination terminal to which a new incoming call for busy incoming-call destination terminal is to be forwarded; judgement means for judging whether or not at least one forwarding destination terminal is set for the busy incoming-call destination terminal when the busy incoming-call destination terminal receives the new incoming call; calling means for issuing an incoming-call forwarding call to both of the incoming-call destination terminal and the forwarding destination terminal when the forwarding destination terminal is previously set for the busy incoming-call destination terminal; response recognition means for recognizing a response of the incoming-call destination terminal or the forwarding destination terminal to the incoming-call forwarding call; and response control means for connecting the terminal responding to the incoming-call forwarding call to an extension line or a central office line and for immediately stopping operation of the incoming-call forwarding call to the terminal not responding thereto.
Claim 10
Dependent Claim
177 words
A private branch exchange system having a private branch exchange, the exchange comprising: an incoming-call destination terminal for receiving a new incoming call; memory means for storing data identifying at least one forwarding destination terminal to which a new incoming call for busy incoming-call destination terminal is to be forwarded; judgement means for judging whether or not at least one forwarding destination terminal is set for the busy incoming-call destination terminal when the busy incoming-call destination terminal receives the new incoming call; calling means for issuing an incoming-call forwarding call to both of the incoming-call destination terminal and the forwarding destination terminal when the forwarding destination terminal is previously set for the busy incoming-call destination terminal; response recognition means for recognizing a response of the incoming-call destination terminal or the forwarding destination terminal to the incoming-call forwarding call; and response control means for connecting the terminal responding to the incoming-call forwarding call to an extension line or a central office line and for immediately stopping operation of the incoming-call forwarding call to the terminal not responding thereto.
Claim 11
Dependent Claim
49 words
A private branch exchange system as set forth in claim 8, wherein, when a plurality of forwarding destination terminals are set for the busy incoming-call destination terminal, the incoming-call forwarding call is issued to the incoming-call destination terminal and the plurality of forwarding destination terminals at the same time.
Claim 12
Dependent Claim
58 words
A private branch exchange system as set forth in claim 8, wherein, when a plurality of forwarding destination terminals are set for the busy incoming-call destination terminal, the incoming-call forwarding call is issued to the busy incoming-call destination terminal while the incoming-call forwarding call is issued sequentially with time with respect to the plurality of forwarding destination terminals.
Claim 13
Dependent Claim
65 words
A private branch exchange system as set forth in claim 8, wherein, when the forwarding destination terminal is set in such a chain manner that another forwarding destination terminal is repetitively set for the already-set forwarding destination terminal, the incoming-call forwarding call is issued to the respective forwarding destination terminals at the same time and also to the incoming-call destination terminal, at the same time.
Claim 14
Dependent Claim
66 words
A private branch exchange system as set forth in claim 8, wherein, when the forwarding destination terminal is set in such a chain manner that another forwarding destination terminal is repetitively set for the already-set forwarding destination terminal, the incoming-call forwarding call is issued to the busy incoming-call destination terminal while the incoming-call forwarding call is issued sequentially with time to the respective forwarding destination terminals.
Claim 15
Dependent Claim
52 words
A private branch exchange system as set forth in claim 8, wherein control of the judgement means, the calling means, the response recognition means and the response control means is activated either for an incoming call received from an extension line or for an incoming call received from a central office line.
Claim 16
Dependent Claim
167 words
A private branch exchange system having a private branch exchange, the exchange comprising: an incoming call destination terminal for receiving an incoming call; forwarding means for forwarding the incoming call to a forwarding destination terminal previously set for a busy incoming-call destination terminal when the busy incoming-call destination terminal receives an incoming call; and incoming-call informing means for informing the busy incoming-call destination terminal of the presence of the incoming call simultaneously with the issuing of an incoming-call forwarding call to the forwarding destination terminal from the forwarding means, wherein, when a busy incoming-call destination terminal belonging to the exchange receives an incoming call, the incoming call is informed to both the busy incoming-call destination terminal and a forwarding destination terminal previously set for the busy incoming-call destination terminal, the terminal responding to the incoming-call information is connected to an extension line or a central office line associated with the incoming-call, and the issuing of the incoming-call information to the terminal not responding thereto is immediately stopped.
Claim 17
Dependent Claim
167 words
A private branch exchange system having a private branch exchange, the exchange comprising: an incoming call destination terminal for receiving an incoming call; forwarding means for forwarding the incoming call to a forwarding destination terminal previously set for a busy incoming-call destination terminal when the busy incoming-call destination terminal receives an incoming call; and incoming-call informing means for informing the busy incoming-call destination terminal of the presence of the incoming call simultaneously with the issuing of an incoming-call forwarding call to the forwarding destination terminal from the forwarding means, wherein, when a busy incoming-call destination terminal belonging to the exchange receives an incoming call, the incoming call is informed to both the busy incoming-call destination terminal and a forwarding destination terminal previously set for the busy incoming-call destination terminal, the terminal responding to the incoming-call information is connected to an extension line or a central office line associated with the incoming-call, and the issuing of the incoming-call information to the terminal not responding thereto is immediately stopped.
Claim 18
Dependent Claim
48 words
A private branch exchange system as set forth in claim 14, wherein the incoming-call destination terminal is a multi-function telephone set, and the incoming-call information issued when the incoming-call destination terminal is busy is indicated by means of a lamp, ringing for the incoming-call information, or both thereof.
Claim 19
Dependent Claim
45 words
A private branch exchange system as set forth in claim 14 or 15, wherein, when a plurality of forwarding destination terminals are set for the busy incoming-call destination terminal, the incoming-call information is issued to the plurality of forwarding destination terminals at the same time.
Claim 20
Dependent Claim
47 words
A private branch exchange system as set forth in claim 14 or 15, wherein, when a plurality of forwarding destination terminals are set for the busy incoming-call destination terminal, the incoming call information is issued sequentially with time with respect to the plurality of forwarding destination terminals.
Claim 21
Dependent Claim
55 words
A private branch exchange system as set forth in claim 14 or 15, wherein, when the forwarding destination terminal is set in such a chain manner that another forwarding destination terminal is repetitively set for the already-set forwarding destination terminal, the incoming-call information is issued to the respective forwarding destination terminals at the same time.
Claim 22
Dependent Claim
56 words
A private branch exchange system as set forth in claim 14 or 15, wherein, when the forwarding destination terminal is set in such a chain manner that another forwarding destination terminal is repetitively set for the already-set forwarding destination terminal, the incoming-call information is issued sequentially with time with respect to the respective forwarding destination terminals.
Claim 23
Dependent Claim
64 words
A private branch exchange system as set forth in claim 14 or 15, wherein, when the busy incoming-call destination terminal receives an incoming call, control of informing both of the busy incoming-call destination terminal and the forwarding destination terminal set therefor is activated either for an incoming call received from an extension line or for an incoming call received from a central office line.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1996-03-15 | 1996-09-14 | 1997-03-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-03-15 | 2000-09-14 | 2001-03-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-03-15 | 2004-09-14 | 2005-03-16 | $7700.00 | Window Closed / Lapsed |