TelCom
USER
MANUAL
Version1.02
Manual page 1
Dear Customer,
Thank you for choosing the TelCom Telephone Hybrid.
This time you are not faced with a huge manual because it is simply not necessary because of
the natural recognition of all functions on the user interface.
All functions are self-explanatory and you will certainly appreciate the ergonomics of this
design.
We are confident that you will be using the TelCom for many years to come, and wish you a
lot of success in your application.
With kind regards,
Duco de Rijk
President
D&R ELECTRONICA WEESP B.V.
Rijnkade 15B
1382 GS WEESP-HOLLAND
The Netherlands
Phone: 0294-418 014
Fax: 0294-416 987
Website: http://www.d-r.nl
E-mail: info@d-r.nl
Manual page 2
What is a Telephone hybrid?
Telephone hybrids provide the interface between professional audio equipment and the public
telephone network. They provide protection for your equipment and the public telephone lines,
allowing for varying line signals and line conditions. Automatically canceling out the unwanted
signal they also facilitate two-way communication down a single telephone line.
Each hybrid has a telephone line connection, a handset connection and separate connectors
for audio input and output from a broadcast mixer, or other professional audio source.
A large proportion of D&R hybrids are used in radio and television broadcasting applications
allowing external callers to be connected to the studio mixing console. Most of the other units
are supplied to communication operations allowing extremely effective conversion between 4wire audio circuits and standard telephone lines.
Specs:
AUDIO PROGRAM IN AND OUT
Connectors : Jack stereo 6.3mm and Cinch connectors
Input impedance : 5kOhm (transformer balanced)
Output level : -40 up to +6 dBu
Output impedance : 2kOhm (transformer balanced)
Noise on Receive output : less than -82dB (A weighted)
GENERAL DATA
Power supply : Powered by telephone line
Dimensions : Front 240x44mm, Depth 110mm
Weight : 725grams
LINE INTERFACE
Connector : RJ11
Nominal input level : -6dBu
Nominal output level : -6dBu
Compensation Mode : fully electronic*
Impedance : 600 Ohm
* Depends on telephone line characteristics
Manual page 3
Front panel lay-out
Hook
Call LED When a call is coming in this LED lights up indicating a call is coming in.
Ringer off
Send
Receive
Side tone With this trimmer you can adjust the side tone to a minimum
Line connect switch to connect and disconnect calls from the telephone line.
At the same time a LED lights up
This hidden switch allows you to turn the internal buzzer off by inserting a
small screwdriver
This trimmer adjust the level of the audio sent to the telephone caller which
is connected to the SEND jack/cinch connector on the rear panel.
This trimmer adjust the level of the audio coming in from the telephone
caller which is connected to the RECEIVE jack/cinch connector on the rear
panel.
Manual page 4
Back panel lay-out
RECEIVE
SEND
PHONE: RJ-11 connector to connect with a telephone set.
LINE (wall) RJ-11 connector to connect with the public telephone network.
USER MANUAL
The D&R TelCom telephone Hybrid is designed to create an easy connection between the
public telephone line and your studio equipment.
The Hybrid has to be inserted between your telephone and the telephone line.
Connect the two wires of the telephone line’s wall unit to the RJ-11 connector labeled
LINE (wall) and connect the telephone appliance itself to the Hybrid’s phone output on the
RJ-11 connector labeled PHONE. This can be done with standard available cable assemblies
from your local phone shop.
Now the hybrid is interfaced (fully balanced) between your telephone appliance and its
connection to the outside world. The hybrid can now split the send and return signals.
Now connect the hybrid’s balanced audio output labeled RECEIVE to a (preferable) balanced
input of around +4dBu.
The TelCom stereo jack or Cinch connector labeled SEND has to be connected to a line level
(cleanfeed) output of your mixing console.
This output has to be the mix of all signals except the signal coming from the hybrid itself to
avoid feedback. An Aux output will do, or in broadcast mixers a clean-feed is the best.
NOTE: The output of the Hybrid can be connected balanced via the jack connector or
unbalanced via the Cinch connectors.
(Please be aware that the jack interrupts the Cinch connection)
Balanced Stereo
a mixer.
Balanced Stereo jack/Cinch input to be connected to Mix
Minus/Clean feed (N-1) or Aux output of the mixer.
jack/Cinch output to be connected to line input of
Manual page 5
WIRING SCHEME
PHONE: RJ-11 connector to connect with a handset.
LINE (wall) RJ-11 connector to connect with the public telephone network.
SEND
RECEIVE
CONNECTION WIRING OF BOTH PHONE AND LINE RJ-11 CONNECTORS
PHONE/WALL RJ-11 FUNCTION CONNECTION
Pin 1 n.c.
Pin 2 A (telephone line) In/out
Pin 3 B (telephone line) In/out
Pin 4 n.c.
Balanced Stereo jack or unbalanced input to be connected to Mix
Minus/Clean feed (N-1) or Aux output of the mixer.
Balanced Stereo jack or unbalanced Cinch output to be connected to
a line level input of the mixer.
WIRING OF AUDIO IN AND OUTPUTS
STEREO JACK TO LINE
INPUT / TO CLEANFEED
OUTPUT
Screen Screen (ground) Audio ground
Ring Non-phase (cold) Audio -
Tip Phase (hot) Audio +
MONO CINCH TO LINE
INPUT / TO CLEANFEED
OUTPUT
Screen Non-phase (cold)/ground Audio - ground
Tip Phase (hot) Audio +
SPECIFICATIONS
Audio Inputs
RECEIVE
Impedance 5k Ohm, electronically balanced
Common mode rejection >20dB
Maximum input level +6dBu
Nominal input level -6 dBu
Frequency response 300Hz – 5kHz
Connectors balanced-STEREO JACK / CINCH
TYPE CONNECTION
Manual page 6
SEND
Impedance < 2kOhm, electronically balanced
Common mode rejection >30dB
Maximum output level +6dBu
Nominal output level - 6 dBu
Bandwidth to telephone line 250Hz – 4kHz, -3dB ref 1 kHz
Telephone line impedance Nominally 600 ohm
Telephone line impedance
range
Connectors balanced-STEREO JACK / CINCH
GENERAL
Distortion Less than 0.1% (0dBu out)
Power supply From telephone line
Power consumption Less than 5mA
Dimensions 110x110x40mm (Width x Depth x Height)
Weight 700 g net including packing
300 ohm to 1500 ohm
SETTING UP PROCEDURE
When all connections are made you can dial the caller to whom you want to talk.
If this connection is made you connect the caller to the mixing console by pushing the HOOK
switch. Now listen by means of a PFL (CUE) switch on your mixer to the caller and adjust while
talking the Side tone trimmer so that the outgoing signal (your voice) is best attenuated.
Note: the line balancing to your own telephone station has to be performed one time only,
when no changes are made to the telephone system in your place.
The maximum attenuation will be between 20 to 26 dB.
Note: This also depends upon the characteristics of the telephone line system on location.
Hook
The function of the "HOOK" switch is to connect the hybrid to the telephone line instead of the
phone itself (which can be switched off depending upon the jumper J7/8 setting inside the
TelCom unit).
Default factory setting is that the Phone is not switched off.
The green led indicates that a connection has been made.
Manual page 7
Call
When a call is coming in this LED lights up indicating a call is coming in.
When the Ringer is not switched off (this can be done by a small screwdriver pushing down
the hidden switch underneath the hole labeled “ Ringer off” ) you will hear a ringer melody
coming from the TelCom unit until the moment the Hook switch is pushed. Now the caller is
connected to the TelCom unit.
Ringer off
Behinf this small hole you will find switch that can switch off the internal ringer (small
speaker) This can be done by a small screwdriver pushing down the hidden switch underneath
the hole labeled “ Ringer off”
Send
Behind this small hole in the front panel there is a trimmer that adjust the outgoing level to
the caller coming from the mixer. Adjustment has to be performed once in cooperation with a
caller that can give feedback about the level she/he hears.
Receive
Behind this small hole in the front panel there is a trimmer that adjust the incoming level from
the caller going to the mixer. Adjustment has to be performed once in cooperation with a
caller that can give feedback about the level she/he talks into the phone. This adjustment has
to be a balance between receive level on the TelCom unit and input gain of the connected
mixer.
Sidetone
This hidden trimmer needs to adjusted to a position where the outgoing level is minimally
heard in the receive level coming from the caller.
Manual page 8
Technische
Hinweise zum Anschluss
Telefonhybrids
des
Anschlussbelegung
Manchmal kommt es vor, dass ein
einem Gerdtedefekt, sondern an
Telefon. Nachfolgenden flihren wir die richtige
am
Telefonhybrid betrieben werden
TAE-Stecker
F-Codierung: Abk. f0r
Stecker
Anschlussdose.
F{orhutg
passen
(Wa
die Stecker
t [a oder a1 a-Leitungsader weiB
2 Lb oder bl b-Leitungsader braun
RJ11/ Keine Funktion des Telefons:
Telefon
unterschiedlichen Anschlussbelegungen der Telefonleitungen
kann:
ndanschl uss)
"Fernsprecher-Codierung".
von Telefonen immer nur in F-Buchsen
nicht am
:
Telefonhybrid funktioniert.
Belegung
Durch
der einzelnen Stecker auf, damit der
Nasen
am
fi
t€odorune
rlE.3-f'Srcc*r
Dies liegt nicht an
(RJ11)
TAEder
?
W Externer Wecker/Kl ingel
4 E Erde fi.ir Nebenstelle
5 b2
6 a2
Ftir den Betrieb des Telefons und des Telefonhybrids ist
RJ
I l-Stecker
Kontakte
6
(Western-Stecker):
(davon
4 belegt), Westernstecker
b-Leitungsader vom
zurlick
a-Leitungsader vom
rtick
zu
Belegung Telefonhybrid
Die
6P4C.
grtin
gelb
Gerdt
Gerdt
die Belegung 1 und 2
beiden iuBeren Kontakte fehlen.
erforderlich.
(PHON
E
+
Ll N E)
www.michael-schoebel.de
1 = frei
--
2
frei
=
La
3
oderal a-Leitungsader
4 = Lb
5 = frei
=
frei
5
oder b1
Seite
b-Leitungsader
l von
3
L2/2008
Technische Hinweise zum Anschluss
des
Telelonhybrids
RJ ll-Stecker
Kontakte
6
Telefone
(davon
mit
dieser
RJll-stecker
(Western-Stecker):
4 belegt), Westernstecker
Beschaltung funktionieren mit
(Western-Stecker):
Belegung Telefon Internationale Norm
1 = frei
2 = frei
=
La
3
4 = Lb oder b1
=
frei
5
6 = frei
Belegung Telefon
6P4C.
jedem
oder a1
Die beiden iuBeren Kontakte fehlen.
-
Standard
a-Leitungsader
b-Leitungsader
Kabel am Telefonhybrid
(2.T.
Telekom
Siemens)
/
5 Kontakte
F0r
den
Betrieb des
Der Hersteller hat meistens
TAE.F
1 La oder a1 a-Leitungsader
2 Lb oder b1 b-Leitungsader
Wenn dieses Kabel in den Hybrid
funktioniert und nicht auf 5 und 2 !!!
(davon
Betrieb bestimmter Telefone muss ein angepasstes Kabel venrendet werden,
Telefons m6glich.
4
belegt),
Westernstecker
folgendes
--->
--->
gesteckt
Die beiden iuBeren Kontakte fehlen.
5P4C.
=
frei
1
2 = Lb oder b1 b-Leitungsader
3 = frei
4 = frei
=
La
5
oder a1 a-Leitungsader
6 = frei
Kabel im Lieferumfang:
RJ11
5 = La oder a1 a-Leitungsader
2 = Lb oder b1 b-Leitungsader
wird, ist keine Funktion m6glich, da
ist kein
sonst
das Gerdt auf 3 und
4
www.michael-schoebel.de Seite 2 von 3
t2l2OO8
Technische Hinweise zum Anschluss des Telefonhybrids
Hier der Belerunqsplan als Gesamttibersicht
=
1
a-Leitungsader
=
2
b-Leltungsader
=
frei
3
=trei
4
=
frei
5
=
frei
6
-
./e)
ffir'
tffir
\--r
=
1
frei
2 = lrei
3 = a-Leitungsader
=
4
b'Leitungsader
=
frei
5
=
frei
6
Nichtfunkion
Bei
-
Rl77
des
desTelefons,
Steckerc auf 5 und
ist
die Beleouno
2 zu
dndern lll
-
,/g)
ffi/
tffir
\_J
1 = frei
2 = trei
3 = a-Leitungsader
4 = b-Leitungsader
=
frei
5
=
frei
6
oder
1 = frei
=
2
b-Leitungsader
=
frei
3
4 = trei
5 = a-Leitungsader
=
frei
6
1 = frei
2 = lrei
3 = a-Leitungsader
=
4
b-Leitungsader
=
frei
5
=
frei
6
www.michae l-schoebel.de
Seite 3
von
3 t2l2008
Conformity declaration
according ISO/IEC 22 and EN 45014
Name Manufacturer D&R Electronica Weesp b.v.
Address Manufacturer Rijnkade 15B, 1382 GS Weesp,
The Netherlands
declares that the product
Name product TELEPHONE HYBRID
Model number TELCOM
Product options All
Complies with the following product specifications:
Security EN 60950: 1988 +A1, A2
EMC: CISPR-22: 1985 / EN 55022: 1988 klasse B (*)
EN 50082-1: 1992
IEC 801-2:1991 / prEN 55024-2:1992 - 3kV CD, 8kV AD
IEC 801-3:1984 / prEN 55024-3:1991 - 3 V/m
IEC 801-4:1988 / prEN 55024-4:1992 - 0.5kV signal cables,
1 kV power cables.
Additional info:
The product complies herewith to the following rules
Low voltage 73 / 23 / EEG
EMC-rules 89 / 336 / EEG.
(*) The product has been tested in normal users conditions.
Manual page 9
PRODUCT SAFETY
This product is manufactured with the highest standards and is double checked
in our quality control department for reliability in the "HIGH VOLTAGE" section.
CAUTION
Never remove any panels, or open this equipment. No user serviceable parts
inside. Equipment power supply must be grounded at all times.
Only use this product as described, in user manual or brochure.
Do not operate this equipment in high humidity or expose it to water or other
liquids. Check the AC power supply cable to assure secure contact.
Have your equipment checked yearly by a qualified dealer service center.
Hazardous electrical shock can be avoided by carefully following the above
rules.
PLEASE READ THE FOLLOWING INFORMATION
Especially in sound equipment on stage the following information is essential to know.
An electrical shock is caused by voltage and current, actually it is the current that causes the shock. In
practice the higher the voltage the higher the current will be and the higher the shock. But there is
another thing to consider and it is resistance.
When the resistance in Ohms is high between two poles, the current will be low and vice versa. All three
of these; voltage, current. and resistance are important in determining the effect of an electrical shock.
However, the severity of a shock primarily determined by the amount of current flowing through a
person.
A person can feel a shock because the muscles in a body respond to electrical current and because the
heart is a muscle it can affect, when the current is high enough.
Current can also be fatal when it causes the chest muscles to contract and stop breathing. At what
potential is current dangerous. Well the first feeling of current is a tingle at 0.001 Amp of current. The
current between 0.1 Amp and 0.2 Amp is fatal.
Imagine that your home fuses of 20 Amp can handle 200 times more current than is necessary to kill.
How does resistance affect the shock a person feels.
A typical resistance between one hand to the other in "dry" condition could well over
100,000 Ohm.
If you are playing on stage your body is perspiring extensively and your body resistance is lowered by
more than 50%. This is a situation in which current can easily flow.
Current will flow when there is a difference in ground potential between equipment on stage and in the
P.A. system. Please do check if there is any potential between the housing of the mikes and the guitar
synth amps, which will be linked by your body on stage. Imagine, a guitar in your hand and your lips
close to the mike! A ground potential difference of above 10 volts is not unusual, in improperly wired
buildings it can possibly be as high as 240 volts.
Although removing the ground wire sometimes cures a system hum, it will create a very hazardous
situation for the performing musician.
Always earth all your equipment by the grounding pin in your mains plug.
Hum loops should be only cured by proper wiring and isolation input/output transformers.
Replace fuses always with the same type and rating after the equipment has been turned off and
unplugged.
If the fuse blows again you have an equipment failure, do not use it again and return it to your dealer for
repair.
And last but not least be careful not to touch a person being shocked as you, yourself could also be
shocked.
Once removed from the shock, have someone send for medical help immediately
Always keep the above mentioned information in mind when using electrically powered equipment.
Manual page 10
TelCom
SERVICE
MANUAL
Upon request
Manual page 11
TelCom
TelCom
TelComTelCom
SERVICE
MANUAL
Upon request
Manual page 11
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D&R Electronica Weesp B.V. Bedrijf : 100
1
:
:
300 10700644 Afdekdop 6.4mm rond zwart 4.0000 st
40 10800924 Doos Randapparatuur 9.5" 1.0000 st
20 10150162 Frame TelCom-1p + Frontpanel 1.0000 st
150 10500084 Insul. plate 9.5" randapp. PVC 1.0000 st
130 10700625 Kartelring M3 (buitenvertand) 2.0000 st
330 10250387 Led 3mm red SLR-03A510-020 2.0000 st
10 20851515 PCB ins TelCom 1.0000 st
140 10700600 Parker 2.9x6.5 verz zwart 1.0000 st
80 10700656 Plakvoet SJ-5012 4.0000 st
320 10450210 Pushb SiF 2.8 red-square 1.0000 st
310 10450010 Pushb TAK12x12-107 A3.3 Black 1.0000 st
90 10800956 Schuimblok 9.5" sleuf VE5-2083 2.0000 st
290 10800982 Schuimplaat 530x280x20 mm HLTR 2.0000 st
120 10700787 Taptite M3x6 bolkoppozidr/zwrt 5.0000 st
110 10700790 Taptite M3x6 verzkop/pozidr/zw 4.0000 st
60898515 TelCom Telephone Hybride Stuklijsteenheid
:
1 st
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520 10401246 Capacitor 1n0 R5.0 poly 2.0000 st
450 10401253 Capacitor 10n R5.0 poly 2.0000 st
470 10401254 Capacitor 15n R5.0 poly 1.0000 st
110 10401255 Capacitor 4n7/400v R5.0 2.0000 st
430 10400225 Capacitor 100pf R2.5 ker 4.0000 st
640 10400267 Capacitor 680n R7.5 poly 1.0000 st
680 10401261 Capacitor 100n R5.0 poly 2.0000 st
180 10600535 Conn Cinch 4xPCB gold pl bush 1.0000 st
370 10600445 Conn chass 805-D 4p (RJ11) 2.0000 st
20 10250342 Diode 1N4148 (signal) 2.0000 st
410 10400292 Elco 100uF/ 25V rad R5.0 3.0000 st
580 10400294 Elco 470uF/ 25V rad R5 Taped 1.0000 st
400 10400284 Elco 10uF/50V radial R5.0 4.0000 st
220 10600478 Header 4P 0º R 2.54 3.0000 st
210 10600479 Header 5P 0º R 2.54 1.0000 st
670 10600506 Header 10P box 0º 2.54 2.0000 st
170 10250023 Ic AS-2534 R 1.0000 st
230 10600530 Jack Break slimline S253-84 2.0000 st
700 10250386 Led 3mm green SLR-03A210-020 1.0000 st
710 10250387 Led 3mm red SLR-03A510-020 1.0000 st
10 10200420 PCB TelCom-p 1.0000 st
650 10970009 Piezo buzzer PKM13EPYH4002-BO 1.0000 st
60 10250345 Rect. B80C1500 (round) 1.0000 st
510 10350765 Resistor 1M0 5% 1/4W 1.0000 st
480 10350729 Resistor 1k0 5% 1/4W 2.0000 st
490 10350731 Resistor 1k5 5% 1/4W 1.0000 st
500 10350732 Resistor 1k8 5% 1/4W 3.0000 st
540 10350733 Resistor 2k2 5% 1/4W 2.0000 st
630 10350772 Resistor 5M1 5% 1/4W 1.0000 st
660 10350738 Resistor 5k6 5% 1/4W 1.0000 st
440 10350848 Resistor 10k0 1% 1/4W 1.0000 st
460 10350743 Resistor 15k 5% 1/4W 1.0000 st
560 10350790 Resistor 30E1 1% 1/4W 1.0000 st
690 10350882 Resistor 30k1 1% 1/4W 1.0000 st
600 10350749 Resistor 47K 5% 1/4W 2.0000 st
610 10350750 Resistor 56k 5% 1/4W 1.0000 st
420 10350753 Resistor 100K 5% 1/4W 2.0000 st
530 10350757 Resistor 220k 5% 1/4W 3.0000 st
550 10350789 Resistor 300E 1/4watt 1.0000 st
620 10350918 Resistor 301E 1% 1/4W 1.0000 st
570 10350759 Resistor 330k 5% 1/4W 1.0000 st
590 10350761 Resistor 470k 5% 1/4W 1.0000 st
200 10350002 Resistor vdr SIOV-SO5K250 2.0000 st
190 10970011 Resonator CSALF3M58G55-B0 1.0000 st
240 10600414 Shunt 2p (mini jumper) 4.0000 st
380 10550414 Switch 2pole mini NS 1.0000 st
390 10550963 Switch Alps 4p-sh (4x om) 1.0000 st
350 10950018 Trafo LM-NP-1003-B (PTT line) 2.0000 st
80 10250333 Transistor BC327/25-RR (TAPE) 1.0000 st
100 10250332 Transistor BC337/25-RR Tape!!! 2.0000 st
140 10300155 Trimmer 10K 1turn vert 2.0000 st
130 10300146 Trimmer 4k7 1turn vert (H) 1.0000 st
160 10250371 Zenerdiode 10V/400mW 1.0000 st
20851515 PCB ins TelCom Stuklijsteenheid
:
1 st
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150 10250350 Zenerdiode 18V0/400mW 1.0000 st
360 10250369 Zenerdiode 5V1/400mW 1.0000 st
20851515 PCB ins TelCom Stuklijsteenheid
:
1 st
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