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Detailed Call Flow for Converse—VRI Calls
H-6 Issue 4 September 1995
To ensure the robust operation of the VRU data passing operation, be sure to
implement the following recommendations:
■ Include the
prompt and collect
command in the VRU script for each data
field passed in the
converse-on
step.
■ Administer each
prompt and collect
command to recognize the ‘‘#’’
character as the end-of-string character.
■ Ensure the number of digits expected is one greater than the number of
digits passed to allow for the ‘‘#’’ character, which terminates every
converse data field.
Also, ensure no announcement is played in these
prompt and collect
steps.
■ Ensure the first digit timeout in the
prompt and collect
steps is five
seconds greater than the corresponding converse data delay. (For
example, if the
converse-on
step passes two data fields, and if the
converse first data delay is 0 secs and the converse second data delay is
4 secs, the first digit timeouts for the two
prompt and collect
commands
should be at least 5 and 9 seconds, respectively.)
■ Ensure the interdigit timeout in the
prompt and collect
steps is at least five
seconds.
■ Administer the converse first data delay to give a VRU under a heavy load
sufficient time to allocate a DTMF touch-tone receiver after answering the
call.
■ Administer the converse second data delay to give a VRU under a heavy
load sufficient time to complete any tasks between the first and second
prompt and collect
command. (For example, the VRU can invoke a new
application if the first data field passed is used to identify the application
script to be executed.)
■ In general, for
converse-on
steps pass data to the VRU, ensure the VRU
script does not execute any commands between the time the call is
answered and the time when the first
prompt and collect
command is
executed.
VRU Data Collection
When digits are passed from DEFINITY to the VRU, the first VRU script
commands executed are
answer phone
and
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 DEFINITY, there will be two
prompt
and collect
commands on the VRU to receive them.
If the first digit string (<data_1>) passed to the VRU is for application selection,
the CONVERSANT Script Builder
exec
command invokes the appropriate script.
If a second digit string (<data_2>) is also used to pass an argument to this