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A method, system, and program for controlling advertising output during hold periods are provided. A context for a call on hold is detected. An advertisement is selected for output during a hold space a hold period of the call according to the context. Output of the advertisement during the hold spa

A method, system, and program for controlling advertising output during hold periods are provided. A context for a call on hold is detected. An advertisement is selected for output during a hold space a hold period of the call according to the context. Output of the advertisement during the hold space is controlled, wherein the advertisement is specified according to the context. The advertisement may include text messages, audio messages, video messages, for advertising a product or service or making an announcement.

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A method, system, and program for controlling advertising output during hold periods are provided. A context for a call on hold is detected. An advertisement is selected for output during a hold space a hold period of the call according to the context. Output of the advertisement during the hold spa

A method, system, and program for controlling advertising output during hold periods are provided. A context for a call on hold is detected. An advertisement is selected for output during a hold space a hold period of the call according to the context. Output of the advertisement during the hold space is controlled, wherein the advertisement is specified according to the context. The advertisement may include text messages, audio messages, video messages, for advertising a product or service or making an announcement. on sums over the true path. 9. The method as recited in claim 1, wherein the ending phase of the signal is determined by the formula: IP+(π/2)×PDI1, where IP is an initial phase of the signal, and PDI1 is the PDI from a last time subinterval of the true path. 10. The method as recited in claim 1, wherein the step of estimating the true path of the signal, further comprises determining a best estimate of an initial phase (IP) of the signal, using the formula: π-arcsin (SQ1/(SI1+SQ12)1/2) when SI1 is less than zero, wherein SI1 and SQ1 are the in-phase and quadrature correlation sums over the true path. 11. An apparatus for detecting and tracking a coded signal within a noisy background environment, comprising: (a) correlator means for correlating a signal over subintervals of time, wherein the signal is correlated in-phase and assigned an in-phase correlated signal value for each time subinterval and correlated in quadrature and assigned a quadrature correlated signal value for each time subinterval; (b) first memory means for storing the in-phase correlated signal values and the quadrature correlated signal values from said correlator means, said first memory means coupled to said correlator means; (c) second memory means for storing path phase displacement indices (PDI), wherein path phase displacement indices represent all possible phase paths for the signal; (d) correlation sums incrementor means for forming in-phase correlation sums (SI) and quadrature correlation sums (SQ), wherein the in-phase correlation sums are formed by adding the in-phase correlated signal value from a first time subinterval and subsequent in-phase or quadrature correlated signal values determined by iteratively comparing a PDI retrieved data from said second memory, wherein the quadrature correlation sums are formed by adding the quadrature correlated signal value from the first time subinterval and subsequent in-phase or quadrature correlated signal values determined by iteratively comparing the PDI retrieved data from said second memory, said correlation sums incrementor means coupled to said first memory means and said second memory means; and (e) estimating means for determining a true phase path of the signal, said estimating means coupled to said correlation sums incrementor means and said second memory means. 12. An apparatus as recited in claim 11, wherein said correlation sums incrementor means further comprises an in-phase correlation sums incrementor and a quadrature correlation sums incrementor. 13. An apparatus as recited in claim 11, further comprising a means for generating PDI. 14. An apparatus as recited in claim 13, wherein said means for generating PDI further comprises: (a) a phase path generator; and (b) a path phase displacement index generator, said path phase displacement index generator coupled to said phase path generator and said second memory means. 15. An apparatus as recited in claim 11, wherein said correlator means comprises: (a) an antenna for receiving the coded signal; (b) a preamp assembly coupled to said antenna, said preamp assembly including a signal output; (c) means for mixing the signal output from the preamp assembly with a first locally generated signal and a second locally generated signal which is displaced 90° in phase from the first locally generated signal, thereby resulting in an in-phase signal and a quadrature signal from said signal output; (d) a first low pass filter which receives said in-phase signal and a second low pass filter which receives said quadrature signal; (e) a first A/D convertor coupled to said first low pass filter and a second A/D convertor coupled to said second low pass filter; and (f) an in-phase signal correlator coupled to said first A/D convertor and a quadrature signal correlator coupled to said second A/D convertor. 16. A method for detecting and tracking a coded signal within a noisy background environment, comprising the steps of: (a) correlating a signal over subintervals of time, wherein the signal is correlated in-phase and assigned an in-phase correlated signal value for each time subinterval and correlated in quadrature and assigned a quadrature correlated signal value for each time subinterval; (b) storing in-phase correlated signal values and quadrature correlated signal values into a first memory; (c) retrieving stored data representing path phase displacement indices (PDI) from a second memory; (d) forming in-phase correlation sums (SI) of the in-phase correlated signal values, wherein each in-phase correlation sum has as its first term the in-phase correlated signal value from a first time subinterval and successive partial sums are determined by iteratively comparing the retrieved PDI from said second memory and applying an appropriate in-phase or quadrature correlated signal value from said first memory; (e) forming quadrature correlation sums (SQ) of the quadrature correlated signal values, wherein each quadrature correlation sum has as its first term the quadrature correlated signal value from the first time subinterval and successive partial sums are determined by iteratively comparing the retrieved PDI from said second memory and applying an appropriate in-phase or quadrature correlated signal value from said first memory; and (f) estimating the true phase path of the signal by determining the correlation sums, in-phase or quadrature, having a maximum absolute value, wherein the estimate of the true phase path of the signal includes an ending phase. 17. The method as recited in claim 16, wherein comparing the retrieved PDI from said second memory and applying the appropriate in-phase or quadrature correlated signal value from said first memory during the step of forming the in-phase correlation sums, further comprises the steps of: (a) determining the value of the PDI retrieved from said second memory, wherein the PDI consists of an integer between (-3) to 3, inclusive; (b) adding the in-phase correlated signal value from a subsequent time subinterval as a subsequent partial sum, if the value of the PDI retrieved from said second memory equals zero; (c) adding an additive inverse of the in-phase correlated signal value from the subsequent time subinterval as the subsequent partial sum, if the value of the PDI retrieved from said second memory equals 2 or (-2); (d) adding the quadrature correlated signal value from the subsequent time subinterval signal value as the subsequent partial sum, if the value of the PDI retrieved from said second memory equals 1 or (-3); and (e) adding an additive inverse of the quadrature correlated signal value from the subsequent time subinterval as the subsequent partial sum, if the value of the PDI retrieved from said second memory equals (-1) or 3. 18. The method as recited in claim 16, wherein comparing the retrieved PDI from said second memory and applying the appropriate in-phase or quadrature correlated signal value from said first memory during the step of forming the quadrature correlation sums, further comprises the steps of: (a) determining the value of the PDI retrieved from said second memory, wherein the PDI may consist of an integer between (-3) to 3, inclusive; (b) adding the quadrature correlated signal value from a subsequent time subinterval as a subsequent partial sum, if the value of the PDI retrieved from said second memory equals zero; (c) adding an additive inverse of the quadrature correlated signal value from the subsequent time subinterval as the subsequent partial sum, if the value of the PDI retrieved from said second memory equals 2 or (-2); (d) adding the in-phase correlated signal value from the subsequent time subinterval as the subsequent partial sum, if the value of the PDI retrieved from said second memory equals 1 or (-3); and (e) adding an additive inverse of the in-phase correlated signal value from the subsequent time subinterval