Abstract The remote control arrangement permits switched audio access to the existing interoffice facilities of a customer owned private automatic branch exchange (PABX), for example, WATS trunks, Foreign Exchange (FX) trunks, and tie lines as well as various intra-office facilities that may exist such as dialed dictation, voice answering and recording, voice paging and other miscellaneous internal services that may be available within the existing PABX. A switched connection from any remote telephone station may be established to any switchable route within the PABX by dialing a specified seven digit code. The seven digit code establishes the connection to the PABX switching system over one of the existing PABX local exchange trunks. Next, an enable code is keyed from the telephone set and transmitted to a receiver decoder and translator attached to the switching machine. In response thereto, the switching machine generates output signals which are applied to the translator and if a valid enable code has been keyed, the machine will switch the connection and submit a dial tone connection to the telephone set, following which any code that presently exists within the PABX communication system can be dialed, thus obtaining access to that particular inter-office or intra-office facility.
In a telephone communication system having a central switching exchange and subscriber stations equipped with telephone instruments for multi-frequency tone signaling representative of digits displayed on the instrument, the combination therewith of an automatic private branch exchange, a communication channel to said branch exchange from said central exchange, a tone signal receiver associated with said branch exchange and operable to translate tones keyed from said subscriber instruments to a plurality of output pulse patterns corresponding to and indicative of the discrete tones generated at said subscriber instruments, and control means connected with said channel and said receiver and operable upon reception of a preselected combination of output pulse patterns from said receiver to switch said channel into said branch exchange to enable route switching within the branch exchange under the control of the tone signals keyed at said subscriber instrument.
Claim 2
Dependent Claim
140 words
In a telephone communication system having a central switching exchange and subscriber stations equipped with telephone instruments for multi-frequency tone signaling representative of digits displayed on the instrument, the combination therewith of an automatic private branch exchange, a communication channel to said branch exchange from said central exchange, a tone signal receiver associated with said branch exchange and operable to translate tones keyed from said subscriber instruments to a plurality of output pulse patterns corresponding to and indicative of the discrete tones generated at said subscriber instruments, and control means connected with said channel and said receiver and operable upon reception of a preselected combination of output pulse patterns from said receiver to switch said channel into said branch exchange to enable route switching within the branch exchange under the control of the tone signals keyed at said subscriber instrument.
Claim 3
Dependent Claim
31 words
The combination as in claim 1, said control means including selector means permitting selective variation of the combination of pulse patterns on which said switching in said branch exchange takes place.
Claim 4
Dependent Claim
21 words
The combination as in claim 2, said selector means including manually operated selector switches having a plurality of positions representing digits.
Claim 5
Dependent Claim
27 words
The combination as in claim 1, said control means including detector means operable to sense and respond to pre-selected, sequentially related patterns of pulses from said receiver.
Claim 6
Dependent Claim
25 words
The combination as in claim 4, said detector means so arranged as to lock out and be nonresponsive to any pattern succeeding an incorrect pattern.