AT&T MERLIN LEGEND Release 4.0 Feature Reference page 179

Feature Reference
A page is the range of extension numbers assigned to a DSS. A single DSS can
have three pages of extension numbers, with 50 extension numbers for each
page, for a total of 150 extension numbers. When two DSSs are connected,
each page's capacity is increased to 100 extension numbers. The two
connected DSSs can have three pages of extension numbers for a total of 300
extension numbers.
The beginning number for each page is assigned through system programming.
When the operator presses a Page button, the page of the DSS corresponds to
a range of 50 (for a single DSS) or 100 (for two connected DSSs) extension
numbers. The factory settings for Page buttons are as follows: the Page 1
button begins with Extension 0; the Page 2 button begins with 50; and the Page
3 button begins with 100.
If only one DSS is attached, each Page button assignment sets the console for
a range of 50 extension numbers. If two DSSs are attached, each Page button
assignment sets the console for a range of 100 extension numbers. If 2 DSSs
are used, the factory setting must be changed so that the difference between
extensions assigned to the range is at least 100. For example, assign Page 1
button to begin with extension 100, Page 2 button to begin with extension 200,
and Page 3 button to begin with extension 300.
The beginning extension number associated with each Page button is the same
for all operator positions and cannot be programmed differently for individual
operator positions.
Each Page button range can begin with any extension number that is a multiple
of 50, in the range of 0–9950. However, to speed call handling, the assignments
should be sequential; the range starting with the lowest extension number
should be assigned to Page 1, the range starting with the next higher extension
number should be assigned to Page 2, and the range starting with the highest
extension number should be assigned to Page 3. You cannot program
individual buttons on a DSS.
Each of the 50 DSS buttons corresponds to one of three extension numbers.
The specific extension number is determined by the Page button that the
operator presses. For example, if the first extension number for the Page 1
button is programmed to be extension 100, the DSS buttons and associated
LEDs on a single DSS correspond to extensions 100 to 149. The specific
extensions represented by each DSS button are assigned from top to bottom,
left to right, as shown in Figure 13.
Each DSS button can correspond to numbers for one of the following:
User extension number
Trunk number (801–880)
Pool dial-out code (Hybrid/PBX only)
Direct Station Selector: MLX
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