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DMTH4
LECTROSONICS, INC.6
TELEPHONE
SET LINE
EXPANSION TEL RC
1: GND
2: IN 1
3: IN 3
4: IN 5
5: IN 7
25
13
14
1
6: IN 9
7: IN 11
8: GND
9: OUT 1
10: OUT 3
11: OUT 5
12: OUT 7
13: GND
14: +5V
15: IN 2
16: IN 4
17: IN 6
18: IN 8
19: IN 10
20: +5V
21: OUT 2
22: OUT 4
23: OUT 6
24: OUT 8
25: +5V
PROGRAMMABLE
INPUTS / OUTPUTS
RS-232
LecNet 2
USB
POWER
90-240V 50/60Hz 15W
AB
TELEPHONE HYBRID
MADE IN U.S.A.
TX RX
RX
TX
CODEC RC
CODEC AUX
CODEC AUX
U.S. Patent Number: 5,414,776
LINE
INPUTS
MIC/LINE
OUTPUTS
LECTROSONICS, INC.
Complies with Part 68 FCC rules.
Registration Number:4J3BR09BDMTH4
Ringer Equivalence:
0 . 9 B
This device complies with
Part 15 of the FCC rules.
Operation is subject to the
following two conditions: (1)
This device may not cause
harmful interference, and (2)
this device must accept any
interference received, including
interference that may cause
undesired operation.
Controls and Features
POWER On/Off Switch
The Power On/Off Switch is used to turn the DMTH4 on
(1) or off (0).
USB Port
Standard USB connector for the setup and control of a
DMTH4 from an Windows 2000 or Windows XP com-
puter system with USB interface.
Status LED
The DMTH4 is normally configured as the end slave
unit in a DM Series stack. In this configuration, the
Status LED glows steadily when power is applied and a
Master unit has been detected. The STATUS indicator
will blink to indicate that it has not found the Master unit
or some other error exists.
Note: The DMTH4 is shipped from the factory
configured as a Master unit. In this mode, the
Status indicator glows steadily when power is
applied.
Mode Switch
If a unit configured to run in Slave mode doesn’t detect
a master unit on powerup, it will refuse to boot up and
the Status LED will blink rapidly. In this case, pressing
the Mode switch will force the unit to boot up tempo-
rarily in Master mode to allow settings to be examined
or changed. Cycling the power returns the DMTH4 to
Slave mode.
Pressing the Mode switch while powering up the
DMTH4, places the unit in Software Update mode. The
Status LED blinks slowly while the firmware is updated,
then extinguishes when the process is complete.
Cycling power exits Software Update mode.
Front Panel
Rear Panel
POWER Plug
Standard NEMA 5-15 three-pin power plug capable of
accepting 100-240 VAC, 47-63 Hz.
RS232 Port
A serial RS232 interface provided for setup and control
via computer serial port, or for connecting RS-232
serial control devices from other companies.
USB Port
Standard USB connector for the setup and control of a
DMTH4 from an Windows 2000 or WIndows XP com-
puter system with USB interface.
Programmable Input and Output Ports
Programmable inputs or outputs used to enable control
over a variety of parameters or to indicate the current
state of a programmable input.
DANI
DANI, or Digital Audio Network Interface, is used to
route the digital audio signals passing between the
master and slave units in stacked configurations.
TEL/CODEC RC
These interfaces are used to connect RCWTH4 remote
control units.
Audio Inputs and Outputs
Analog audio input and output connectors for Codec
and Aux ports .
Telephone Set/Line
RJ11 jacks for connecting a standard telephone line
and a single-line telephone set to the DMTH4.
POWERUSBSTATUSMODE
TELEPHONE HYBRID INTERFACE
R
POWER On/Off SwitchUSB PortStatus LEDMode Switch
POWER Plug RS232 USB Programmable
Input and Output
Ports
DANI
Tel RC
Line Inputs
(Codec/Aux)
Telephone
Set/Line
Mic/Line Oututs
(Codec/Aux)
Codec RC