Toll diversion control arrangement

Claim 2

In a toll diversion arrangement for private branch exchanges having a dial pulse register bridged onto a network connection established between a restricted station and a central office trunk circuit, circuit means interposed between said trunk circuit and the network connection comprising, means activated by said register over said network connection for temporarily isolating said trunk circuit from dial pulses generated at said station, means monitoring said connection for repeating said pulses to said trunk circuit during the period said isolating means is activated, and means controlled in response to a signal on said network connection originated by said register upon detection of a dial restricted code for disconnecting said trunk circuit from said network connection.

Claim 3

The invention recited in claim 1 wherein said circuit further includes means under control of a different signal transmitted by said register upon detection of a valid dial coded for deactivating said isolating means thereby to permit the direct connection of said generated dial pulses to said trunk circuit.

Claim 4

A communication arrangement comprising a switching network through which calls are established on an automatic basis, a plurality of stations connected to said network, a register circuit being selectively connectable via said network to said stations for registering call destination information transmitted in the form of dial pulses by a connected one of said stations, a trunk circuit connected to a distant office over which calls are established between said stations and said distant office, means effective on calls from restricted ones of said stations to said office for establishing a bridiging connection which connects said register circuit over an established network path to said one restricted station and to said trunk circuit, circuit means interposed between said network path and said trunk circuit for cooperating with said register circuit in the screening and disconnection of calls being attempted to restricted destinations; and circuit means including (a) means for isolating a transmission path of said trunk circuit which couples said network path to said office, (b) means for forwarding received called destination information generated by said restricted station to said office while said digits are being screened by said connected register circuit, and (c) means under control of said connected register for releasing the established network path to said trunk circuit upon detection of a dial code designating a restricted destination.

Claim 5

A communication arrangement comprising a switching network through which calls are established on an automatic basis, a plurality of stations connected to said network, a register circuit being selectively connectable via said network to said stations for registering call destination information transmitted in the form of dial pulses by a connected one of said stations, a trunk circuit connected to a distant office over which calls are established between said stations and said distant office, means effective on calls from restricted ones of said stations to said office for establishing a bridiging connection which connects said register circuit over an established network path to said one restricted station and to said trunk circuit, circuit means interposed between said network path and said trunk circuit for cooperating with said register circuit in the screening and disconnection of calls being attempted to restricted destinations; and circuit means including (a) means for isolating a transmission path of said trunk circuit which couples said network path to said office, (b) means for forwarding received called destination information generated by said restricted station to said office while said digits are being screened by said connected register circuit, and (c) means under control of said connected register for releasing the established network path to said trunk circuit upon detection of a dial code designating a restricted destination.

Claim 6

The invention set forth in claim 3 further including means under control of signals from said register circuit transmitted over said network path for disabling said isolating means as well as said forwarding means in the event a non-restricted destination code is dialed.

Claim 7

The arrangement set forth in claim 3 wherein said bridged connection comprises a pair of transmission leads commonly connected to said restricted station, register circuit and said circuit means, and said isolating means comprises a relay controlled by said register circuit and having contacts connected in said transmission leads.

Claim 8

The invention set forth in claim 5 wherein said forwarding means comprises a relay having a winding connected to said leads and being operatively responsive to station generated dialed pulses, and having contacts thereof connected to transmission leads of said trunk circuit for forwarding station generated dial pulses directly to said distant office.

Claim 9

In a communication system having a trunk circuit connected to a distant office, a plurality of stations, means for establishing call connections between calling ones of said stations and said trunk circuit for completion of calls via said distant office, a toll diversion control arrangement for preventing completion of calls to toll dial areas Via said trunk circuit from restricted ones of said stations comprising a register circuit selectively bridged onto the established call connection between each restricted station and said trunk circuit for monitoring the dialed digits, means responsive to said establishing means for interposing pulse repeating means in said established connection when said restricted station is equipped with a rotary dial so that station originated digits are repeated to said distant office, means for releasing said established call connection upon the detection of a toll area dial code in said register circuit, and means for removing said repeating means and releasing said register circuit if a non-toll area dial code is detected.

Claim 10

In a communication system having a trunk circuit connected to a distant office, a plurality of stations, means for establishing call connections between calling ones of said stations and said trunk circuit for completion of calls via said distant office, a toll diversion control arrangement for preventing completion of calls to toll dial areas Via said trunk circuit from restricted ones of said stations comprising a register circuit selectively bridged onto the established call connection between each restricted station and said trunk circuit for monitoring the dialed digits, means responsive to said establishing means for interposing pulse repeating means in said established connection when said restricted station is equipped with a rotary dial so that station originated digits are repeated to said distant office, means for releasing said established call connection upon the detection of a toll area dial code in said register circuit, and means for removing said repeating means and releasing said register circuit if a non-toll area dial code is detected.

Claim 11

A communication arrangement comprising at least one station and a register circuit responsive to dial pulses generated at said station for translating a call destination code therefrom, a network responsive to a call origination for interconnecting said station to said register circuit via a plural wire path of said network, two leads of said path constituting a pulse transmission circuit over which said dial pulses are forwarded to said register circuit, first relay means in said register circuit connected to said transmission circuit and being responsive to said dial pulses, means cooperating with said register circuit for establishing a bridged connection via said network upon translation of a distant office code by said register circuit, said bridge connection comprising a parallel connection of a toll control circuit into the existing connection on said plural wire path, a central office trunk circuit connected to said distant office and to said toll control circuit, said toll control circuit comprising a second and third relay each having windings respectively connected to separate leads of said pulse transmission circuit, said second relay being operatively responsive with said first relay means to subsequently received dial pulses, contacts of said second relay connected to said trunk circuit for repeating dial pulses to said office, and a digit translator of said register circuit controlled by contacts of said first relay means for screening station dialed codes.

Claim 12

A communication arrangement comprising at least one station and a register circuit responsive to dial pulses generated at said station for translating a call destination code therefrom, a network responsive to a call origination for interconnecting said station to said register circuit via a plural wire path of said network, two leads of said path constituting a pulse transmission circuit over which said dial pulses are forwarded to said register circuit, first relay means in said register circuit connected to said transmission circuit and being responsive to said dial pulses, means cooperating with said register circuit for establishing a bridged connection via said network upon translation of a distant office code by said register circuit, said bridge connection comprising a parallel connection of a toll control circuit into the existing connection on said plural wire path, a central office trunk circuit connected to said distant office and to said toll control circuit, said toll control circuit comprising a second and third relay each having windings respectively connected to separate leads of said pulse transmission circuit, said second relay being operatively responsive with said first relay means to subsequently received dial pulses, contacts of said second relay connected to said trunk circuit for repeating dial pulses to said office, and a digit translator of said register circuit controlled by contacts of said first relay means for screening station dialed codes.

Claim 13

The arrangement set forth in claim 8 further including a fourth relay connected to an output of said digit translater and being operative upon detection of a predetermined restrictive code, and contacts of said fourth relay being operative for releasing said second relay thereby causing said bridged connection to be released.

Claim 14

The arrangement set forth in claim 8 further including a fifth relay connected to another output of said digit translator and being operative upon detection of an allowed code, contacts of said fifth relay being operative to release said first relay means as well as to operate said third relay means, and contact means of said third relay means being operative to directly connect said originating station to said trunk circuit.