User manual
Chapter 7, Call Guide and Digit Collection Template
Special Handling of IVS Phrases, Data, and Pauses
During call guide processing, an Aastra switch groups the following steps when they are
sequential and use the same IVS group:
• Announcement Pause step
• Goto step
• If / Else / End If steps
• Set step
• Speak IVS Data step
• Speak IVS Phrase step
A switch stops grouping steps whenever it encounters any other step or one of these steps
with a different phrase group.
To prevent possible delays between phrases, a switch collects all phrases, data, and
pauses for sequential steps that share a common phrase group before instructing an IVC
device to play them. Without grouping, an IVC device could complete the first of two
related phrases before it receives the second phrase. The switch proceeds to another call
guide step after an IVC device finishes playing all the collected phrases, data, and pauses.
If an IVC device fails to play any of the collected phrases, data, or pauses, the switch
skips to the alternate call guide step that Speak IVS Phrase and Speak IVS Data steps
define for times when an IVC device is unavailable.
Be careful when changing variables with a Set step. A Set step within a group of
sequential steps that share a common phrase group can change variables that previous
steps in the group use. For example, a Set step can change a system variable that a
preceding Speak IVS Phrase step uses to define the phrase identifier. Because the system
does not play phrases until it processes all the steps in the group, the Set step could cause
the Speak IVS Phrase step to refer to an incorrect or invalid phrase.
Digit Collection
The collection of input from callers, usually in the form of dual-tone multi-frequency
(DTMF) digits, is a primary capability of IVS. Digit collection requires a digit collection
template, a construct that defines the characteristics of the caller input to be collected.
Each Get Digits step in a call guide uses a digit collection template. Different Get Digits
steps can share the same digit collection template.
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