Patent ID: 6233237
Filing Date: 2001-05-15
Classification: H04Q

Abstract:
A computer readable medium having stored therein a set of routines for implementing a R2 data connection protocol for R2-MFC short cycling and for R2-MFC spoofing without a tone detection apparatus to detect forward register signals, the R2 data connection protocol providing a data connection between a first network node and a second network node in a computer network over a telecommunications connection, the telecommunications connection including a plurality of data bits sampled at a sampling interval T, the plurality of data bits sent in a plurality of time slots, the plurality of time slots having at least one signaling time slot and a plurality of data time slots, the computer readable medium comprising:seizure signal, having a first-bit=0 and a second-bit=0 in a signaling time slot;seizure acknowledgment signal, having a first-bit=1 and a second-bit=1 in a signaling time slot;answer signal, having an first-bit=0 and a second-bit=1 in a signaling time slot;clear forward signal, having an first-bit=1 and a second-bit=0 in a signaling time slot;A-3 backward signal, having a signal of (1020 Hz+900 Hz) as data bits in a data time slot;A-4 backward signal, having a signal of (1140 Hz+780 Hz) as data bits in a data time slot;B-4 backward signal, having a signal of (1140 Hz+780 Hz) as data bits in a data time slot;A-6 backward signal, having a signal of (900 Hz+780 Hz) as data bits in a data time slot;B-6 backward signal, having a signal of (900 Hz+780 Hz) as data bits in a data time slot; andplurality of forward signals, including a pair of signals from any of 1380 Hz, 1500 Hz, 1620 Hz or 1980 Hz signals as a two-signal combination as data bits in a data time slot.