the invention is implemented using software the software may be stored in a computer program product and loaded into the computer system 1000 using the removable storage drive 1014 the hard drive 1012 or the communications interface 1024 fig1 is simplified block diagram illustration of a control signal scheme in accordance with an embodiment of the present invention in fig1 a conventional current cell device 1100 is shown the conventional current cell device 1100 is configured to receive a control signal 1102 as an input to a signal control device 1104 the signal control device 1104 provides an output to a differential pair arrangement 1106 and to a current source 1108 which provides a transmitting current the conventional current cell device 1100 however is problematic in that it represents a source of transient distortion residual echo to local receivers in an embodiment of the present invention an improved current cell device 1109 is provided that reduces the transient distortion and reduces the residual echo back to the local receiver in the current cell device 1109 the control signal 1102 is provided as an input to a logic module 1111 the logic module 1111 includes a predictive device 1112 and a logic device 1114 the logic device 1114 can be implemented for example as a logical or device the predictive device 1112 receives the control signal 1102 and provides a look ahead signal 1110 as an output predictive devices such as the device 1112 are well known.