Digital Telephone Hybrid
Rio Rancho, NM
13
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
A
B
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.
POWER
USB
STATUS
MODE
TELEPHONE HYBRID INTERFACE
R
DMTH4 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 a Windows-based computer 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 after the power on boot sequence
is complete 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.
Mode Switch
If a unit configured to run in slave mode doesn’t detect
a master unit on powerup, it will refuse to boot and the
Status LED will blink rapidly. In this case, pressing the
Mode switch will force the unit to boot up temporar-
ily 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 once a firmware update is ini-
tiated, then extinguishes when the process is complete.
Cycling the 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
vial 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-based computer system with
USB interface.
Programmable Input and Output Ports
Programmable inputs are provided to enable external
control over a variety of parameters. Each input can re-
spond to a contact closure, a DC voltage source, or the
variable voltage outpout from a potentiometer. Program-
mable outputs are used to indicate the current state of
a programmable input, monitor activity on telephone or
codec interfaces, and monitor active preset changes.
DANI
DANI, or Digital Audio Network Interface, is used to con-
nect the digital audio outputs of 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 inputs and outputs only.
Telephone Set/Line
RJ11 jacks for connecting standard telephone line and a
single line telephone set to the DMTH4.
POWER Plug
RS232
USB
Programmable
Input and Output
Ports
DANI
Tel RC
Line Inputs
(Codec/Aux)
Telephone
Set/Line
Mic/Line Outputs
(Codec/Aux)
Codec RC