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4. PBX Systems
• error messages
• called/calling identification
• phone status
• line selection
• Display Key prompts
The data used to display information in the LED alphanumeric display is in
ASCII format. When the telephone is not in use, the display normally shows
the date and time. The content of the display is changed automatically (e.g.,
receiving an incoming call, making an outgoing call, or activating a feature).
The Dialogic
®
PBX Integration Board can retrieve the information on its
alphanumeric display using the d42_displayex( ) function. The function
places the display data (50 bytes) in an application buffer. Refer to the
Dialogic
®
PBX Integration Software Reference for more information about
using the d42_displayex( ) function.
Example
An application uses the dx_dial( ) function and the appropriate dial string to
press keys to dial extension number 1045. The d42_display( ) function is used
to retrieve the display data and place it in an application buffer (shown below).
The information for the top row (last 25 characters) of the display is checked.
Data in bytes 00 through 05 indicate that extension 1045 is being dialed.
data
61 3D 01 00 04 05 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20
20
byte 00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20 21 22 23
24
data 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20
20
byte 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48
49
Called/Calling Number ID (within the PBX)
If receiving a call on a Dialogic
®
PBX Integration Board from another
extension, the PBX sends calling number ID data (by default, the extension
47