DMTH4
LECTROSONICS, INC.
40
Telephone numbers have a maximum length of 32 characters based on the following char-
acters. All other characters will be filtered out before they are stored.
The following controls are enabled
only when the control panel is connected to a DMTH4.
Add button - Click to open a dialog box allowing a new telephone book entry to be
made.
Edit button - Click to open a dialog box allowing the selected telephone book entry to
be edited.
Delete button - Click to delete the selected telephone book entry. You will be prompted
to confirm the selection before the entry is deleted.
Telephone book list - List of the titles of all of the telephone book entries. Click title to
select. Use Up and Dwn buttons to change the entry order.
Up button - Click to move the currently selected telephone book entry one position
closer to the top of the list.
Dwn button - Click to move the currently selected telephone book entry one position
closer to the bottom of the list.
Dial button - Click to dial the telephone number associated with the currently selected
telephone book entry.
The general telephone interface configuration controls and indicators consist of:
Enable Auto Answer - Check to enable auto answer of incoming calls based on the
number of rings identified in “Nbr of rings.”
Nbr of rings - Sets the number of rings required before DMTH4 automatically answers
incoming telephone calls. The range is from 1 to 5 rings.
Enable Auto Disconnect - Click to enable automatic telephone disconnect at end of call.
Dial Speed - Sets the speed for dialing telephone numbers. This control has a range
from 1 to 5.
DTMF Level - Sets the level of the DTMF tone when dialing outgoing calls. The range
is from -6 dB to +6 dB.
Ringing LED - Blinks yellow if an incoming call is present.
Connect/Disconnect button - Toggles the connection state of the interface. It is enabled
only when the control panel is connected to a DMTH4.
Connection LED - Glows red when the interface is connected.
Privacy button - Toggles the privacy state of the interface. It is enabled only when the
control panel is connected to a DMTH4 and the interface is in the connected state.
Privacy LED - Glows red if privacy is engaged
Telephone
Book (cont)
Telephone
Interface controls
Name
Description
Value
Description
0 1 2 3 4 5 6 7 8 9
DTMF digits
* #
DTMF alphabetic characters (commonly used)
A B C D
DTMF alphabetic characters (rarely used)
!
(exclamation point) causes a hookswitch “flash”
,
(comma) causes a one second pause in dialing
- . ( )
(dash, dot, left and right parenthesis) allowed as delimiters
to improve readability