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3158 条记录 (耗时 0.157 秒)

    Conference arrangement
    1.
    发明授权
    Conference arrangement 失效
    会议安排

    公开(公告)号：US3912874A

    公开(公告)日：1975-10-14

    申请号：US47641774

    申请日：1974-06-04

    申请人： AMERICAN TELEPHONE & TELEGRAPH

    发明人： BOTTERELL JOHN JOSEPH ,  DAYTON ROBERT LEWIS ,  GUYLER JAMES RAYMOND

    IPC分类号： H04M3/56 ,  H04Q3/00

    CPC分类号： H04Q3/00 ,  H04M3/56 ,  H04M2203/5063

    摘要： A conference arrangement for use with a telephone switching center is disclosed. The conference arrangement comprises a transmission bridge for interconnecting an originator''s port circuit with a plurality of conferee port circuits. A dial pulse register and a multifrequency receiver and decoder are associated with the originator''s port circuit and each conferee port is equipped with an automatic dialer that can be programmed to summon the conferees via regular and alternate telephone numbers. The originator is connected to the bridge by dialing the telephone number assigned to the bridge including a digit for establishing the precedence level of the conference call and a pattern number which selects the group of conferees to be summoned by the automatic dialers. Once connected to the conference arrangement, the originator can transmit tones to the multifrequency receiver and decoder to selectively control all ports of the bridge and any other similar bridges that are connected to the bridge via a conferee port. Among other things, the originator can transfer himself and a selected conferee to an ad-lib bus for private consultation, place the conference in a broadcast mode and insert different pattern numbers in selected ones of the automatic dialers to summon other conferees. The originator can also select a conferee port mode to directly dial the telephone number of a conferee.

    Permanent signal lockout circuit for crossbar switching systems
    2.
    发明授权
    Permanent signal lockout circuit for crossbar switching systems 失效
    用于交叉开关系统的永久信号锁定电路

    公开(公告)号：US3875342A

    公开(公告)日：1975-04-01

    申请号：US41263573

    申请日：1973-11-05

    申请人： AMERICAN TELEPHONE & TELEGRAPH

    发明人： STERN MARK CHARLES

    IPC分类号： H04M3/12 ,  H04Q3/00

    CPC分类号： H04M3/12 ,  H04Q3/0004

    摘要： A permanent signal line lockout arrangement for crossbar switching systems is disclosed in which a silicon controlled rectifier (SCR) is inserted in series with the operate path of the line relay. When a customer lifts his handset to initiate a dial tone service request, the on-hook to off-hook transition triggers the SCR into conduction by means of a capacitive coupling network, and the line relay operates through the SCR. When a permanent signal condition is detected, the line is connected to a permanent signal holding trunk that is modified to remove the holding ground from the sleeve lead. Removal of the ground releases the hold magnet which thereupon reconnects the line relay to the permanent signal line. However, because the capacitor coupling network became charged when the sleeve lead holding ground was present, the SCR is not retriggered by the onhook to off-hook transient that results when the line relay is reconnected. The line is thus held out of service for the duration of the permanent signal condition without need to maintain any switching connection to a permanent signal trunk.

    摘要翻译： 公开了一种用于交叉开关系统的永久信号线锁定装置，其中可控硅整流器（SCR）与线路继电器的操作路径串联插入。 当客户抬起手机发起拨号音服务请求时，挂机到摘机转换触发SCR通过电容耦合网络导通，线路继电器通过SCR操作。 当检测到永久信号状态时，线路被连接到永久信号保持中继线，其被修改以从套筒引线去除保持接地。 去除地面会释放保持磁铁，然后将线路继电器重新连接到永久信号线。 然而，由于电容器耦合网络在存在套筒引线保持接地时变得充电，因此当线路继电器被重新连接时，SCR不会被挂钩到摘机瞬变重新触发。 因此，线路在永久信号状态的持续期间保持不工作，而不需要保持与永久信号中继线的任何切换连接。

    Toll call denial circuit
    3.
    发明授权
    Toll call denial circuit 失效
    电话呼叫电话

    公开(公告)号：US3786196A

    公开(公告)日：1974-01-15

    申请号：US3786196D

    申请日：1972-08-28

    申请人： AMERICAN TELEPHONE & TELEGRAPH

    发明人： GRESHAM P

    IPC分类号： H04Q3/62 ,  H04M1/66

    CPC分类号： H04Q3/625

    摘要： A toll call denial circuit for allowing local calls and blocking toll calls outgoing from PBXs (Private Branch Exchanges). Following seizure of a central office line by a PBX station dialing ''''9'''', the call denial circuit distinguishes between local and toll calls by having a counter and decoder register and check the first digit dialed over the line to determine if it is a toll access digit such as ''''0'''' or ''''1''''. The denial circuit includes a pulse suppressor circuit having a resistor-capacitor filter which prevents spurious signals on the line from being detected as dial pulses. Following registration of the first dialed digit, the time characteristic of this filter is changed to prevent the counter from registering dial pulses of a subsequently dialed digit but allowing a response to an on-hook condition on the line to release the denial circuit.

    摘要翻译： 用于允许本地呼叫和阻止从PBX（私人交换机）传出的长途呼叫的长途呼叫拒绝电路。 在通过拨打“9”的集团电话中心办公室线路缉拿之后，呼叫拒绝电路通过计数器和解码器注册来区分本地和长途呼叫，并检查通过线路拨号的第一个数字，以确定它是否是收费通路 数字如“0”或“1”。 拒绝电路包括具有电阻 - 电容滤波器的脉冲抑制电路，该电阻滤波器防止线路上的杂散信号被检测为拨号脉冲。 在第一拨号数字的注册之后，改变该滤波器的时间特性，以防止计数器记录随后拨打的数字的拨号脉冲，但允许响应线上的挂机状态以释放拒绝电路。

    Busy line control for switching system
    4.
    发明授权
    Busy line control for switching system 失效
    用于切换系统的BUSY LINE CONTROL

    公开(公告)号：US3758724A

    公开(公告)日：1973-09-11

    申请号：US3758724D

    申请日：1971-12-20

    申请人： AMERICAN TELEPHONE & TELEGRAPH

    发明人： ANDERSON F ,  SIEGLINGER J ,  CERNY L ,  MURPHY J

    IPC分类号： H04Q3/42 ,  H04M3/22

    CPC分类号： H04Q3/42

    摘要： A crossbar telephone switching system wherein one of a number of markers, under the control of a called directory number registered therein, seizes a number group circuit and causes the number group circuit to translate the called number into the equipment location of the called line, the nature (class) of the called line, and the busy-idle condition of the called line. If the called line is found to be busy at a time when all markers are busy, the marker connects to a common register, registers therein the busy called number, releases from the common register, and initiates the usual busy-back switching function. All other markers having then registered therein called numbers requiring number group translation and busy-idle testing connect to the common register and compare their called numbers with the called number in the common register. Any marker having a matching called number releases from the common register and initiates a busy-back switching function without seizing a number group circuit for translation and without performing line testing. Any marker not having a matching number releases from the common register and seizes a number group circuit in the normal manner. After a suitable time delay to allow all markers to finish the comparison of called numbers, the common register clears itself of the called number registered therein and renders itself available for another such use.

    Screening of misdialed calls in step-by-step local level hunting connectors
    5.
    发明授权
    Screening of misdialed calls in step-by-step local level hunting connectors 失效
    在逐步的局部级别监视连接器中筛选错误的呼叫

    公开(公告)号：US3573387A

    公开(公告)日：1971-04-06

    申请号：US3573387D

    申请日：1969-05-06

    申请人： AMERICAN TELEPHONE & TELEGRAPH

    发明人： NEBE CARL R ,  SWITZER JAMES T

    IPC分类号： H04Q3/00 ,  H04M3/52 ,  H04Q3/38

    CPC分类号： H04Q3/00

    摘要： A circuit is disclosed for screening misdialed calls in a local level hunting connector which may have line appearances both for normal subscribers as well as for a subscriber receiving an especially high volume of calls. The normal subscribers appearing on the connector are assigned directory numbers ending in 1 while the high volume subscriber is assigned a specific ''''tens'''' digit. The connector is prevented from responding directly to any tens digit until the first pulse of the units digit is received. The connector is then ''''unlocked'''' and permitted to hunt as it normally would. However, if a subsequent pulse is received, indicating a units digit other than 1, the normally grounded commutator segment corresponding to the tens digit becomes ungrounded and a commutator segment connected to an intercept position is grounded unless the tens digit is the specific one assigned to the high volume subscriber.

    Apartment house telephone system
    6.
    发明授权
    Apartment house telephone system 失效
    公寓电话系统

    公开(公告)号：US3557318A

    公开(公告)日：1971-01-19

    申请号：US3557318D

    申请日：1966-09-29

    申请人： AMERICAN TELEPHONE & TELEGRAPH

    发明人： BUONSANTE JOHN J ,  SYVERTSEN NORMAN J

    IPC分类号： H04M11/02 ,  H04M11/00

    CPC分类号： H04M11/025

    摘要： A telephone switching arrangement for apartment houses whereby the apartment tenant telephones utilized for normal communication through the central office are also utilized for lobby-apartment conversations and control of lobby door opening mechanisms. The lobby call to a tenant''s idle telephone is identified by a distinct ringing signal separate from that normally applied on central office calls. If the tenant line is busy, the lobby call will apply an alerting tone to the busy connection and the tenant may, by means of a monitoring common line relay and holding bridge, place the prior central office call on hold and converse with the lobby. Should the tenant ''''hang up'''' after conversing with the lobby, the ''''held'''' central office call will rering the tenant''s telephone.