DMTH4
Controls and Features
Front Panel
TELEPHONE HYBRID INTERFACE
MODE | STATUS | USB | POWER |
Mode Switch
POWER On/Off Switch
The Power On/Off Switch is used to turn the DMTH4 on
(1) or off (0).
Status LED | USB Port | POWER On/Off Switch |
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.
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.
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.
Rear Panel
| 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 |
POWER | interference received, including |
interference that may cause | |
undesired operation. |
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| TX | A | B | RX |
| 13 | 1: GND | 6: IN 9 | 11: OUT 5 | 16: IN 4 | 21: OUT 2 |
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| 25 | 2: IN 1 | 7: IN 11 | 12: OUT 7 | 17: IN 6 | 22: OUT 4 |
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| 3: IN 3 | 8: GND | 13: GND | 18: IN 8 | 23: OUT 6 |
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LecNet 2 | 4: IN 5 | 9: OUT 1 | 14: +5V | 19: IN 10 | 24: OUT 8 |
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5: IN 7 | 10: OUT 3 | 15: IN 2 | 20: +5V | 25: +5V |
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USB |
| PROGRAMMABLE | RX | EXPANSION | TX | |||||
| INPUTS / OUTPUTS | |||||||||
CODEC RC
MIC/LINE LINE
OUTPUTS INPUTS
CODEC AUX CODEC AUX
TEL RC
TELEPHONE | U.S. Patent Number: 5,414,776 | |||||
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| SET | LINE |
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| Complies with Part 68 FCC rules. |
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| Registration Number:4J3BR09BDMTH4 |
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| Ringer Equivalence: 0 . 9 B | TELEPHONE HYBRID | ||
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| LECTROSONICS, INC. |
| MADE IN U.S.A. | |
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POWER Plug | RS232 USB Programmable | Tel RC | Mic/Line Oututs | Telephone |
| Input and Output | Codec RC | (Codec/Aux) | Set/Line |
| Ports | Line Inputs |
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| DANI |
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POWER Plug |
| DANI |
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Standard NEMA
RS232 Port
A serial RS232 interface provided for setup and control via computer serial port, or for connecting
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.
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.
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
6 | LECTROSONICS, INC. |
