6. The method of claim 1 , further comprising: with a second device other than the application server, selectively providing input from a text exchange client interface and a voice interface to the text input channel and the voice input channel, respectively.
6. The method of claim 1 , further comprising: with a second device other than the application server, selectively providing input from a text exchange client interface and a voice interface to the text input channel and the voice input channel, respectively. 7. The method of claim 6 , further comprising: with the second device, in response to detecting a potential problem with communications from one of the text exchange client interface and the voice interface, providing input from the other of the text exchange client interface and the voice interface to the corresponding one of the text input channel and the voice input channel.