2N Helios IP User manual, 1510 v1.13 - Manual (Page 58)

Quick Configuration for Calling 3.2
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user name, date, time, identification and/or called number. These symbols are
replaced with real values before sending. Refer to the table below:
$User$
Called user name
$DateTime$ Current date and time
$DialNumber$ Called number
$HeliosId$ 2N ® Helios IP identifier
Miscellaneous subsection.
It is unnecessary to define the remaining parameters for a quick configuration. For
details on the parameters necessary for a detailed configuration, refer to the
subsections below.