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AssigneeBellSouth Corporation
InventorsThomas J. Moquin, David G. Kelley, Jr., Evan Kraus, Eric R. Quinn, Raymond J. Smets, Terry Durand
Estimating the term…
In connection with enhanced telephone service, such as personal number service, the detection of whether an incoming telephone call is a facsimile transmission or an ordinary voice call is improved by a utilizing a modified ring back signal during the time in which the service circuit node of the telephone system is attempting to detect the presence of the calling tone (CNG signal) of the sending facsimile machine. Particularly, the ring back signal is modified to increase the off time of the ring back signal to be greater than the period of the CNG signal. Where the CNG signal is a periodic signal with a period of 4 seconds with a 0.5 on time and a 3.5 off time, the modified ring back signal has a period of 7 seconds with a 2 second on time and a 5 second off time.
In an advanced intelligent network for a telephone system for routing a call from a calling party's equipment to a called party, wherein prior to completion of the call to the called party, the call from the calling party's equipment is connected via a line to a service circuit node for the purpose of determining whether a CNG signal, having a CNG period consisting of an on time and an off time, is present in the call from the calling party's equipment, the improvement comprising a detector in the service circuit node connected to the line and a file in the service circuit node for generating a modified ring back tone on the line wherein the modified ring back tone has a period with an on time and an off time wherein the off time is greater than the period of the CNG signal.
A method for routing a telephone call in an advance intelligent network, including a service circuit node, comprising the steps of:
Dependencies are inferred from the claim text.