Crestron electronic DMTH4 User Manual

DMTH4

Digital Telephone Hybrid

INSTALLATION and QUICK START GUIDE

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Purchase Date:

Rio Rancho, NM, USA
www.lectrosonics.com

DMTH4

LECTROSONICS, INC.2

Installation Guide

Important Safety Instructions

This symbol, wherever it appears, alerts you to the presence of uninsulated dangerous voltage inside the
enclosure -- voltage that may be sufficient to constitute a risk of shock.

This symbol, wherever it appears, alerts you to important operating and maintenance instructions in the
accompanying literature. Please read the manual.

1) Read these instructions.

2) Keep these instructions.

3) Heed all warnings.

4) Follow all instructions.

5) Do not use this apparatus near water.

6) Clean only with a dry cloth.

7) Do not block any ventilation openings. Install in accordance with the manufacturer's instructions.

8) Do not install near any heat sources such as radiators, heat registers, stoves, or other apparatus (including
amplifiers) that produce heat.

9) Do not defeat the safety purpose of the polarized or grounding-type plug. A polarized plug has two blades with
one wider than the other. A grounding type plug has two blades and third grounding prong. The wider blade or
the third prong are provided for your safety. If the provided plug does not fit into your outlet, consult an electri­cian for replacement of the obsolete outlet.

10) Protect the power cord from being walked on or pinched particularly at plugs, convenience receptacles, and the
point where they exit from the apparatus.

11) Only use attachments/accessories specified by the manufacturer.

12) Use only with the cart, stand, tripod, bracket, or table specified by the manufacturer, or sold with the apparatus.
When a cart is used, use caution when moving the cart/apparatus combination to avoid injury from tip-over.

13) Unplug this apparatus during lightning storms or when unused for long periods of time.

14) Refer all servicing to qualified service personnel. Servicing is required when the apparatus has been damaged
in any way, such as power-supply cord or plug is damaged, liquid has been spilled or objects have fallen into the
apparatus, the apparatus has been exposed to rain or moisture, does not operate normally, or has been
dropped.

15) WARNING -- TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK, DO NOT EXPOSE THIS APPARATUS
TO RAIN OR MOISTURE.

Rio Rancho, NM 3

DMTH4

Table of Contents

Important Safety Instructions .................................................................................................................................................................. 3

Table of Contents ...................................................................................................................................................................................... 4

Introduction ................................................................................................................................................................................................ 5

Unpacking the unit ................................................................................................................................................................................... 5

Controls and Features .............................................................................................................................................................................. 6

Front Panel ............................................................................................................................................................................................... 6

POWER On/Off Switch ........................................................................................................................................................................ 6

USB Port .............................................................................................................................................................................................. 6

Status LED ........................................................................................................................................................................................... 6

Rear Panel ............................................................................................................................................................................................... 6

POWER Plug........................................................................................................................................................................................ 6

RS232 Port ........................................................................................................................................................................................... 6

USB Port .............................................................................................................................................................................................. 6

Programmable Input and Output Ports ................................................................................................................................................ 6

Mode Switch ......................................................................................................................................................................................... 5

DANI ..................................................................................................................................................................................................... 5

TEL/CODEC RC .................................................................................................................................................................................. 5

Audio Inputs and Outputs .................................................................................................................................................................... 5

Telephone Set/Line .............................................................................................................................................................................. 5

Hardware Installation ................................................................................................................................................................................ 7

Installing the DM system into a rack........................................................................................................................................................ 7

Cables ...................................................................................................................................................................................................... 7

Audio Connections................................................................................................................................................................................... 7

Audio Inputs (AUX and CODEC) ............................................................................................................................................................. 7

Unbalanced Sources ............................................................................................................................................................................ 7

Balanced Sources ................................................................................................................................................................................ 7

Audio Outputs (AUX and CODEC) .......................................................................................................................................................... 8

Telephone Line Jack ................................................................................................................................................................................ 8

Programmable Inputs .............................................................................................................................................................................. 8

Programmable Outputs ............................................................................................................................................................................ 8

Expansion I/O ports ................................................................................................................................................................................. 9

CODEC and TEL Remote Control Ports ................................................................................................................................................. 9

Installing LecNet2™ Software and USB Driver ................................................................................................................................... 10

Installing LecNet2™ Software ............................................................................................................................................................... 10

Installing the LecNet2™ USB Driver ..................................................................................................................................................... 10

USB driver installation Windows XP...................................................................................................................................................... 10

First Time Installation ......................................................................................................................................................................... 10

Installation of Additional Units (or LecNet 2™ devices) .................................................................................................................... 11

USB Driver Installation (Windows 2000) ............................................................................................................................................... 12

First Time Installation ......................................................................................................................................................................... 12

Basic System Setup ................................................................................................................................................................................ 13

Control System Interconnections .......................................................................................................................................................... 13

Initial Setup ............................................................................................................................................................................................ 13

Master/Slave Configuration ................................................................................................................................................................... 14

Using the DMTH4 Control Panel to Change Master/Slave Mode ......................................................................................................... 14

Initial Setup Hints ................................................................................................................................................................................... 15

Example Teleconferencing Setup .......................................................................................................................................................... 16

Setting up the DMTH4 Main Matrix ....................................................................................................................................................... 17

Setting up the DM1624 Main Matrix ...................................................................................................................................................... 17

Setting up the DM1624 Expansion Matrix ............................................................................................................................................. 17

Setting up the DMTH4

Output Source Multiplexer ................................................................................................................................................................. 18

Basic System Operation ......................................................................................................................................................................... 19

Making a Phone Call ............................................................................................................................................................................... 19

Make a Telephone Call Using a Telephone Set ..................................................................................................................................... 19

Make a Telephone Call Using the Activity Tab ...................................................................................................................................... 19

Using the Touch Tone Pad ..................................................................................................................................................................... 19

Use the “Type the number to dial” box................................................................................................................................................... 20

Use the Phone Book .............................................................................................................................................................................. 20

Setting Up Automatic Telephone Answer and Automatic Disconnect ................................................................................................... 20

Connecting to the CODEC Interface using the Activity Tab .................................................................................................................. 21

FCC Part 68 Compliance ....................................................................................................................................................................... 22

FCC Part 15 Compliance ....................................................................................................................................................................... 22

Warranty .................................................................................................................................................................................. Back Cover

LECTROSONICS, INC.4

Introduction

The purpose of this guide is to assist in the setup and

operation of a typical DMTH4 system. This guide

assumes familiarity with the DM Series Digital Audio

Processors, its components and software menus and

setup screens. To get the most out of the DMTH4

system, it is suggested to review the information

presented in the DMTH4 Series Reference Manual.

A detailed Help is also available to assist in the setup

and operation of a DMTH4 system using the USB

interface and a Windows® 2000 or Windows® XP

computer system. In addition to assistance setting up

and operating the DMTH4 system, the Help files include

a complete listing of the DMTH4 Serial Commands.

These commands can be used to setup and operate

the DMTH4 system via external devices using either the

USB or RS232 serial port.

Unpacking the unit

Compare the packing list enclosed with the unit with the

original order. Inspect all items for damage. Immedi-

ately call 1-800-821-1121 to report any items that are

missing or damaged. The sooner we get notified, the

sooner we can get any needed replacement items

shipped to your location.

Installation Guide

Rio Rancho, NM 5

DMTH4

Controls and Features

Front Panel

R

TELEPHONE HYBRID INTERFACE

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 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 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.

POWERUSBSTATUSMODE

POWER On/Off SwitchUSB PortStatus LEDMode 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.

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 tempo­rarily 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

16: IN 4

11: OUT 5
12: OUT 7
13: GND
14: +5V
15: IN 2

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

DANI

LecNet 2

1: GND

13

7: IN 11

2: IN 1

25

8: GND

3: IN 3

9: OUT 1

4: IN 5

10: OUT 3

5: IN 7

PROGRAMMABLE

USB

INPUTS / OUTPUTS

POWER

90-240V 50/60Hz 15W

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.

1

14

RS-232

6: IN 9

POWER Plug RS232 USB Programmable

Input and Output

Ports

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 com­puter 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.

AB

TX RX

RX

TX

EXPANSION TEL RC

Codec RC

CODEC RC

Tel RC

MIC/LINE

OUTPUTS

INPUTS

CODEC AUX

CODEC AUX

Line Inputs

TELEPHONE

LINE

SET LINE

Mic/Line Oututs

(Codec/Aux)

Complies with Part 68 FCC rules.
Registration Number:4J3BR09BDMTH4

0 . 9 B

Ringer Equivalence:

LECTROSONICS, INC.

U.S. Patent Number: 5,414,776

TELEPHONE HYBRID

MADE IN U.S.A.

Telephone

Set/Line

(Codec/Aux)

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.

LECTROSONICS, INC.6

DM In

+

-

Source

+

Unbalanced source to DM input

(3-Wire)

Shield

DM In

+

-

Source

+

Unbalanced source to DM input

(2-Wire)

Shield

Balanced source to DM input

(3-Wire)

DM In

+

-

Source

+

-

Shield

Hardware Installation

Installation Guide

Installing the DM system into a rack

The DMTH4 occupies a single space. There are no

special ventilation requirements. Mount with 4 rack

screws using the appropriate mounting holes. It is

recommended to use nylon washers to prevent damage

to the front panel’s finish when tightening the screws.

For North American installations, connect the Power

Cable supplied with the unit between the DMTH4 and a

stable power source. All DM processors have internal

switching power supplies that can tolerate voltages

ranging from 100 VAC to 240 VAC. Use an approved

power cable for installations outside North America.

Cables

It is recommented to use lacing bars for cable strain

relief when mounting in a rack. Use only professional

audio cable with proper shielding - typically, two con-

ductor plus ground/shield.

Audio Connections

The analog audio inputs and outputs are connected

through 5 pin de-pluggable connectors. Strip the

insulation back 1/8 to 3/16" but do not tin (apply solder

to) the leads. Insert the wire into a de-pluggable

connector, leaving less than 1 mm of bare wire ex-

posed, then tighten the retaining screw.

Audio Inputs (AUX and CODEC)

Unbalanced Sources

Unbalanced audio sources (positive and ground)
include items such as consumer VCR’s, DVD players,
etc., and may use both two wire and three wire cables.
In either case, the positive output from the source
should be connected to the appropriate positive (+)
input on the DMTH4. The shield or negative (–) output
should be connected the DM’s negative (–) input. Two
wire cables should have a jumper between the DMTH4
negative input and ground. Three wire cables should
have the shield connected to the DMTH4’s ground input
and the shield and negative (–) leads joined together at
the unbalanced source end.

Caution: Do not over tighten the retaining
screw.

Retaining Screw

(Do not overtighten)

5-pin depluggable

connector

Do not leave more than 1

mm of exposed wire

beyond the connector.

Do not apply

solder to leads

Note the labeling on the DMTH4 Chassis for the

positive and negative leads. Ground is shared between

two connections (the center pin).

Note: The DM Series does not have a “pin 1
problem.” Inputs and outputs are true differential
connections.

Balanced Sources

Balanced differential sources from external equipment
and microphones should be wired according to Bal-
anced source to DM input (3-Wire). (See illustration.)
When connecting balanced sources to the DMTH4, it is
important to not connect chassis ground (shield) to
either signal conductor.

Rio Rancho, NM 7

DMTH4

Audio Outputs (AUX and CODEC)

The AUX and Codec outputs are a balanced differential
configuration and include an attenuator to reduce the
signal to mic level. Wire these outputs as indicated in
the following illustration.

DM Out

DM Out

+

-

DM Out to Balanced Input

Shield

(3-Wire)

+

-

DM Out to Unbalanced Input

Shield

(3-Wire)

Destination

+

-

Destination

+

Potentiometer Connection for

Analog Control of Gain

10K Linear Potentiometer

CCW

CW

+5V
To Programmable Input Pin

Gnd

Contact Closure as Programmable Input

To Programmable Input Pin

Gnd

DC Voltage Source as Programmable Input

To Programmable Input Pin

0VDC (Off) to +5VDC (On)

Gnd

Output RP Gain Control

Inputs control tab in the Control Panel GUI. See the
Rear Panel Ctrl tab in the Control Panel software Help

for setting all programmable input parameters.

on the Programmable

DM Out

+

-

Shield

Destination

+

DM Out to Unbalanced Input

(2-Wire)

Telephone Line Jack

Connect a standard telephone cable with RJ11 connec­tors between the back panel Telephone Line Jack and
the host telephone system.

Programmable Inputs

Programmable inputs are provided to enable external
control over a variety of parameters. Each input can
respond to a contact closure, a DC voltage source, or
the variable voltage output from a potentiometer. The
following illustrates common connections to the pro­grammable input pins. (See also Programmable
Inputs and Outputs Wiring Example.)

No external pull-up resistors are necessary because
each programmable input is internally pulled up through
a 100K resistor to +5V. When using a continuous
voltage with one of the programmable inputs, the
function of the programmable input must be set to
either

Analog Input RP Gain Control

or

Analog

Programmable Outputs

Programmable outputs are used to indicate the current
state of a programmable input, monitor activity on
telephone or codec interfaces, and monitor active
preset changes. Each programmable output is the
electrical equivalent of a contact closure to ground.
When a programmable output is “active”, it conducts
current to ground. When the programmable output is
“inactive”, no current flows to ground. The maximum
usable voltage for the programmable outputs is 40 V
and they will safely conduct up to 100 mA DC continu­ous. Following are some typical uses for the program­mable outputs.

LED is on when the programmable output is active

+5VDC (from Programmable I/O
Pins 14, 20, 25)

Programmable Output Pin

LED is off when the programmable output is active

+5VDC (from Programmable I/O
Pins 14, 20, 25)

Programmable Output Pin

Gnd (from Programmable I/O
Pins 1, 8, 13)

Relay is on when the programmable output is active

Coil current <100mA

Programmable Output Pin

Gnd (from Programmable I/O
Pins 1, 8, 13)

Relay Coil

380 Ohms

380 Ohms

1N4001
or equiv.

LECTROSONICS, INC.8

External
DC Voltage
Source
(<40VDC)