Tadiran Telecom EMERALD ICE, Installation & Maintenance Manual

Page: 248 / 536

Emerald ICE Installation, Programming & Maintenance Manual
7-67
Phone
Cal
l
Ha
nd
ling
Pr
ogramming
(03)
7
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)
7.22
Single Line Telephone-Flash