Single Line Telephone-Flash - Tadiran Telecom Emerald ICE Installation & Maintenance Manual

Single Line Telephone-Flash

7.22
Description
Single Line Telephones and similar analog devices connected to analog ports of the
Emerald ICE system must use unsophisticated signaling to administer
call‐processing operations (like transfer and hold). This fundamental call control is
handled in the form of specific hook‐switch operations. These are known as
Hook‐switch Flash (or just Flash) commands.
Whenever a system feature is to be invoked at a single line telephone, the user
must operate the hook‐switch in a fashion that is distinguishable from an on‐hook
(hang up) request. This becomes essential for proper handling of calls considering
the single line telephone user may operate the hook‐switch quickly – desiring to
hang up and place a new call. Yet this fast operation of the hook‐switch might be
interpreted as a Hook‐switch Flash operation.
Considering these factors the Emerald ICE system provides for customization of the
hook‐switch command monitoring in system software. The database configuration
may be adjusted to ignore hook‐switch operations that are considered too short to
be any valid request and to limit the time allotted conditions.
If the analog device/SLT does not have a Hook‐Flash operation button, operation
of the hook‐switch must be fall within the time periods "Start" and "End" in order
to be processed as a valid hook‐flash operation.
Hook‐switch operations that are shorter than the "Start" time are ignored.
Hook‐switch operations that are longer than the "End" time are considered to be
On‐Hook (hang up) commands.
Default Settings:
SLT Hook Flash – Start is set at 200 milliseconds. (Range is 60‐1400)
SLT Hook Flash – End is set at 1000 milliseconds. (Range is 100‐1500)
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Emerald ICE Installation, Programming & Maintenance Manual