When digits are passed from the switch to the VRU, the first VRU script commands executed are answer phone, prompt and collect. No announcement is programmed for the prompt and collect command, and the pound sign (#) is programmed as the end-of-string sign. If two sets of digits, that is, <data_1> and <data_2>, are passed by the switch, there will be two prompt and collect commands on the VRU.

If the first digit string, that is, <data_1>, passed to the VRU is for application selection, the Avaya Interactive Response Script Builder exec command invokes the appropriate script. If a second digit string, that is, <data_2>, is also used to pass an argument to this selected application, the first command in the executed script is a prompt and collect command with no announcement prompt programmed and with the pound sign (#) programmed as the end-of-string character.

Converse second data delay is used to give the VRU time to invoke the selected application before the <data_2> digit string is outpulsed.

The application developer must ensure the administered converse first data delay and converse second data delay timers allow time for the VRU to successfully collect all outpulsed digits, even during periods of heavy call volume. Loss of digits from <data_2> is an indication the converse second data delay timer needs to be increased or the VRU timing values require tuning as appropriate to resolve issues.