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4. PBX Systems
36
34
24
19
1404
08
28
40
33
23
18
13
03
07
27
39
32
22
17
1202
06
31
21
16
11
01
26
37
35
25
20
15
05
09
29
CALL WAITINGCALL WAITING
Display
Indicators
MWI
CLEAR
LINE
MUTE
XFER
SPKR
PROG
Feature Keys
Figure 4. Siemens ROLMphone 400
4.2.3. Programmable Feature Keys
As illustrated in
Figure 4, there are 40 Feature Keys located below the display
on the ROLMphone 400 telephone. These keys are configured either during
PBX installation or by the user (using the telephone set or the Dialogic
®
PBX
Integration Board). The CLEAR, SPEAKER, MUTE, XFR, and LINE keys
are assigned during PBX configuration and cannot be user programmed. The
MAILBOX indicator is programmed on each phone (see
4.2.1. Siemens
ROLM Programming Requirements
above) for Feature Key 01. Feature Keys
39 and 40 are used for volume control and cannot be programmed either.
There is an LED indicator associated with each key, except those discussed in
the following paragraph. The LED indicators are circular and can take on one
of the six states listed in
Table 7.
55