WIRELESS TRANSACTION COMMUNICATION

1 . A system for indicating a request, comprising:

a communication interface configured to

receive from a first communication party a transaction party identifier determined using an identification signal received via a first communication channel, and

receive a request from a second communication party identified by the transaction party identifier; and

a processor coupled with the communication interface and configured to

identify that the first communication party provided the transaction party identifier associated with request, and

indicate via a second communication channel to the first communication party the request.

2 . The system of claim 1 , wherein the request includes a request for an electronic financial payment.

3 . The system of claim 1 , wherein the first communication channel includes an acoustic communication channel.

4 . The system of claim 1 , wherein the identification signal is an ultrasonic signal.

5 . The system of claim 1 , wherein the first communication party includes a mobile device.

6 . The system of claim 1 , wherein the second communication party includes a point of sale device.

7 . A system for receiving a request, comprising:

a microphone configured to receive via a first communication channel an identification signal;

a processor coupled with the microphone and configured to determine an identifier encoded in the identification signal; and

a communication interface coupled with the processor and configured to

provide via a second communication channel the identifier, and

receive via the second communication channel a request originated by a party identified by the identifier.

8 . The system of claim 7 , wherein the identification signal is an ultrasonic signal.

9 . The system of claim 7 , wherein the request include a request to authorize an electronic financial payment.

10 . The system of claim 7 , wherein the communication interface is further configured to provide via the second communication channel an authorization responsive to the request.

11 . A system for initiating a request, comprising:

a first communication interface configured to provide via a first communication channel an identification signal; and

a second communication interface configured to

provide via a second communication channel a request to be indicated to a receiver of the identification signal, and

receive via the second communication channel an authorization confirmation of the request.

12 . The system of claim 11 , wherein the identification signal is an ultrasonic signal.

13 . The system of claim 11 , wherein the request include a request for an electronic financial payment.

14 . The system of claim 11 , wherein the first communication interface is connected to a sonic device configured to transmit the identification signal using a speaker.

15 . A method for indicating a request, comprising:

receiving from a first communication party a transaction party identifier determined using an identification signal received via a first communication channel;

receive a request from a second communication party identified by the transaction party identifier;

using a processor to identify that the first communication party provided the transaction party identifier associated with request; and

indicating via a second communication channel to the first communication party the request.

16 . A method for receiving a request, comprising:

receiving via a first communication channel an identification signal;

using a processor to determine an identifier encoded in the identification signal;

providing via a second communication channel the identifier; and

receiving via the second communication channel a request originated by a party identified by the identifier.

17 . A method for initiating a request, comprising:

providing via a first communication channel an identification signal;

using a communication interface to provide via a second communication channel a request to be indicated to a receiver of the identification signal; and

receiving via the second communication channel an authorization confirmation of the request.

18 . A computer program product for indicating a request, the computer program product being embodied in a tangible computer readable storage medium and comprising computer instructions for:

receiving from a first communication party a transaction party identifier determined using an identification signal received via a first communication channel;

receive a request from a second communication party identified by the transaction party identifier;

identifying that the first communication party provided the transaction party identifier associated with request; and

indicating via a second communication channel to the first communication party the request.

19 . A computer program product for receiving a request, the computer program product being embodied in a tangible computer readable storage medium and comprising computer instructions for:

receiving via a first communication channel an identification signal;

determining an identifier encoded in the identification signal;

providing via a second communication channel the identifier; and

receiving via the second communication channel a request originated by a party identified by the identifier.

20 . A computer program product for initiating a request, the computer program product being embodied in a tangible computer readable storage medium and comprising computer instructions for:

providing via a first communication channel an identification signal;

providing via a second communication channel a request to be indicated to a receiver of the identification signal; and

receiving via the second communication channel an authorization confirmation of the request.