AT&T Merlin II Release 3 System Manual page 16

2-8 MERLIN II System Telephones
The BIS-34 phone has two columns of five buttons, each above the dial pad
and two columns of 12 buttons each located to the right of the dial pad. See
Figure 2-8.
The BIS-34D phone is configured the same as the BIS-34 and has a display at
the top of the phone. The display provides a variety of visual aids for most
features. See Figure 2-8. Refer to "Display" in Section 3, "Reference," for
more information.
34-Button phone
(BIS-34)
FIGURE 2-8 The BIS-34 and BIS-34D phones.
5-Button, 10-Button, 34-Button, and 34-Button Deluxe Phones
The 5-Button phone has one column of five buttons above the dial pad for
outside lines and programmable features. See Figure 2-9.
The 10-Button phone has two columns of five buttons, each above the dial pad
for outside lines, intercom, and programmable features. See Figure 2-9.
5-Button phone
FIGURE 2-9 5-Button and 10-Button phones.
34-Button phone with Display
(BIS-34D)
10-Button phone