Clear-Com CCI-22 User Manual
CLEAR-COM ECLIPSE
CCI-22
DUAL CHANNEL PARTY-LINE INTERFACE
INSTRUCTION MANUAL
CCI-22 Dual Channel Party Line Interface Instruction Manual
© 1997, 2005, 2008 Vitec Group Communications Ltd. All Rights Reserved.
Part Number 810307Z Rev. 3
Vitec Group Communications LLC
850 Marina Village Parkway
Alameda, CA 94501
U.S.A
Vitec Group Communications Ltd
7400 Beach Drive
IQ Cambridge
Cambridgeshire
United Kingdom
CB25 9TP
Vitec Group Communications
Room 1806, Hua Bin Building
No. 8 Yong An Dong Li
Jian Guo Men Wai Ave
Chao Yang District
Beijing, P.R. China 100022
® Clear-Com, CellCom/FreeSpeak and the Clear-Com Communications Systems logo are registered trademarks of
The Vitec Group plc.
CONTENTS
OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-1
Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-1
Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-2
Level Controls. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-2
Power LED . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-2
Send and Return Rejection Null Adjustment. . . . . . . . . . . . . . .1-2
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1
Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-1
Installation In Interface Frame . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-1
Termination of Party-Lines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-1
Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-2
Clear-Com Party Lines General Discussion . . . . . . . . . . . . . . . . .2-2
Two Separate Party Lines. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-3
Multiple Clear-Com Beltpack Channels from One Power Supply.2-4
To Connect “RTS” 2-Channel 2-Wire Party-Lines. . . . . . . . . . . . .2-7
Power from “Channel A” Line Only . . . . . . . . . . . . . . . . . . . . . .2-8
Two Isolated RTS Lines. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-9
Adjustments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-10
Power LED . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-10
Level Controls. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-10
Audio Rejection Null Adjustment. . . . . . . . . . . . . . . . . . . . . . . . .2-10
Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-11
MAINTENANCE. . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1
Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-1
Bill of Materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-1
Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-6
SPECIFICATIONS. . . . . . . . . . . . . . . . . . . . . . . . . . 4-1
LIMITED WARRANTY. . . . . . . . . . . . . . . . . . . . . . . W-I
Warranty Period . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .W-i
Technical Support. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .W-i
Warranty Repairs and Returns . . . . . . . . . . . . . . . . . . . . . . . . . . . . W-ii
Non-Warranty Repairs and Returns . . . . . . . . . . . . . . . . . . . . . . . . W-ii
Extended Warranty. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . W-ii
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CCI-22 Dual Channel Party-Line Interface Instruction Manual
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Liability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . W-iii
ii
CCI-22 Dual Channel Party-Line Interface Instruction Manual
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Please read and follow
these instructions
before operating a
CCI-22 dual channel
party-line interface.
IMPORTANT SAFETY
INSTRUCTIONS
For your safety, it is important to read and follow these
instructions before operating a CCI-22 dual channel party-line
interface:
(1) WARNING: To reduce the risk of fire or electric shock, do not
expose a CCI-22 dual channel party-line inteface to rain or moisture.
Do not operate a CCI-22 dual channel party-line interface near water,
or place objects containing liquid on it. Do not expose a CCI-22 dual
channel party-line interface to splashing or dripping water.
(2) For proper ventilation, make sure ventilation openings are not
blocked. Install the CCI-22 dual channel party-line interface according
to the directions in the Installation chapter of this manual.
(3) Do not install a CCI-22 dual channel party-line interface near a heat
source such as a radiator, heat register, stove, or other apparatus
(including amplifiers) that produces heat. Do not place naked flame
sources such as candles on or near a CCI-22 dual channel party-line
interface.
(4) Only use attachments/accessories specified by Clear-Com
Intercom Systems.
(5) Unplug the CCI-22 dual channel party-line interface during lightning
storms or when unused for long periods of time.
(6) Refer all servicing to qualified service personnel. Servicing is
required when:
• The CCI-22 dual channel party-line interface has been damaged
in any way.
• Liquid has been spilled or objects have fallen into the CCI-22 dual
channel party-line interface chassis.
• The CCI-22 dual channel party-line interface has been exposed
to rain or moisture.
• The CCI-22 dual channel party-line interface does not operate
normally.
• The CCI-22 dual channel party-line interface has been dropped.
Please familiarize yourself with the safety symbols in Figure 1. When
you see these symbols on a CCI-22 dual channel party-line interface,
they warn you of the potential danger of electric shock if the CCI-22
dual channel party-line interface is used improperly. They also refer
you to important operating and maintenance instructions in the
manual.
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CCI-22 Dual Channel Party-Line Interface Instruction Manual
v
CAUTION
RISK OF ELECTRIC SHOCK
DO NOT OPEN
This symbol alerts you to the presence of uninsulated dangerous
voltage within the product's enclosure that might be of sufficient
magnitude to constitute a risk of electric shock. Do not open
the product's case.
This symbol informs you that important operating and maintenance instructions are included in the literature accompanying
this product.
Figure 1: Safety Symbols
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CCI-22 Dual Channel Party-Line Interface Instruction Manual
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1
OPERATION
INTRODUCTION
This chapter describes how to use the CCI-22 dual party-line interface.
You can use this chapter once the Eclipse matrix system has been
correctly installed and configured with the Eclipse Configuration
System, and when the CCI-22's internal jumpers have been set. For
information on configuring the CCI-22 jumpers refer to Chapter 2,
“Installation”.
PL
CCI-22
Power
Send
Recv
Test
PowerPL
Send
Recv
Test
Null
Null
DESCRIPTION
Each CCI-22 dual party-line interface can connect two independent
external 2-wire party-line intercom systems to the Eclipse matrix. It will
support Clear-Com and many other 2-wire analog party-line formats as
R
L
C
R
L
C
well act as an independent 2/4wire party line interface for other 4wire
intercom matrices.
The CCI-22 fully supports call signals between the matrix and a
Clear-Com party-line; call signals between the matrix and other
party-line types may not be fully supported. All call signal paths are
optically isolated. All audio paths are transformer isolated, eliminating
noise induced by ground loops in the party-line systems. "Send" and
"receive" level controls are included on the front panel. The CCI-22
features sophisticated "sidetone nulling" circuitry.
The CCI-22 occupies one slot in an IMF-3 or IMF-102 interface module
frame. Connections to the matrix are via 8-pin RJ-45 connectors on
the rear panel. Connections to external party-lines are via 9-pin
connectors on the rear panel.
The CCI-22's party-line circuits do not receive power from the
matrix, but must be connected to an externally powered party-line.
More than one CCI-22 interface port may be assigned to one Eclipse
system party-line label to create a single unified party-line. However,
the nature of 2-wire to 4-wire hybrid conversions may limit the
maximum number of external 2-wire party-lines that can be combined.
Call signals to any one of the CCI-22 channels will reach destinations
in the other CCI-22 channels in addition to the destination ports within
the matrix.
When a CCI-22 interface port receives a call signal from a Clear-Com
party-line, it will be sent to all ports in the matrix which have “listens”
activated to the party-line at the time of the call signal. In addition, call
signals can be programmed to signal specific stations (see the
Configuration section of the Installation chapter).
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CCI-22 Dual Channel Party-Line Interface Instruction Manual
1-1
OPERATION
In normal use, the CCI-22 interface does not require operator
interaction. The front panel features a set of level controls and a
power indicator LED. The front panel also includes a set of three "null"
adjustment controls. The null adjustment controls are discussed in
“Installation”, Chapter 2.
LEVEL CONTROLS
The Send level controls affect the level of the audio signals from the
Powe r
PL
R
matrix to the external party-line, and the Recv ("receive") control
affects the level of the audio from the party-line into the matrix.
Send
Recv
Test Null
L
The Send and Receive controls have a range of ± 13 dB. They are
normally set at the center position when used with Clear-Com PL-Pro
C
or Encore party-line equipment.
POWER LED
The green Power LED lights when DC power is supplied to the
interface. The interface is powered by the party-line it is connected to.
Send and Return Rejection Null Adjustment
Normally this adjustment is made once during installation. If additional
adjustment is required use the following procedure.
A lack of 2-wire rejection will affect the sound of the operator's own
voice in his or her headset. In interfaces, it is necessary to "null"
(minimize) the rejection when an external party-line is placed in the
matrix environment. Ideally, there should be no portion of the T
signal in the L
isten signal. The nulling procedure for each channel of
the CCI-22 is described here.
The CCI-22 includes built-in nulling circuitry, including a test tone
generator and an accessory earphone. The earphone plugs into a
1/8-inch (3.1mm) phone jack on the front panel. When the earphone is
plugged in, it automatically switches on a test tone, and monitors the
output of the null circuit.
alk
1-2
Separate "R" (Resistance), "L" (Inductance), and "C" (Capacitance)
controls compensate for each component of the line's impedance,
providing the best null possible.
The null circuit is effective on line lengths between zero and 4000 feet
(1200m) with impedances in the range of 120 to 350 ohms, and can
reduce local audio in the received signal by more than 30 dB over the
frequency range of 200 Hz to 8 kHz.
To null one channel of the CCI-22:
1. Connect the external party-line devices together with the cables they
are going to use to the CCI-22 channel.
CCI-22 Dual Channel Party-Line Interface Instruction Manual
Vitec Group Communications
2. Plug the accessory earphone into the front panel jack la beled "Test".
This will disconnect the interface from the matrix and enable the test
oscillator. The oscillator produces a square wave with both low and
high harmonics, allowing you to test all frequencies. The test tone
pulses approximately every half-second.
3. While listening to the test tone in the earphone, adjust the "R"
control until the tone is at a minimum.
4. Repeat Step 3 with the "L" and "C" controls. Because these controls
interact with each other, you will need to repeat steps 3 and 4
several times before you will have minimized the test tone. Continue
adjustment until the tone is virtually inaudible. If an almost complete
null cannot be obtained, it is likely that something is wrong either
with the wiring in the external party-line, or with one of the other
devices attached to the external party-line. Steps 5 through 9 are
troubleshooting hints.
5. If the "R" control is turned fully counter-clockwise, the line has either
more than one termination, or an excessive resistive load.
6. If the "R" control is fully clockwise, then the line has no termination.
7. The "L" control compensates for the low-frequency inductive and
capacitive elements of the external party-line. If the "L" control is
fully turned in either direction, it is likely that there is a problem in the
external party-line. When a Clear-Com party-line is connected, the
"L" control should be just to one side of its mid-pot position.
8. The "C" control compensates for cable capacitance; the setting
depends on the length of the line. If the "C" control is fully
counter-clockwise, this indicates a very short line (under ten feet);
this is a valid setting for a short line.
9. If the "C" control is fully clockwise, this in dicates an excessive ly long
line (over 4,000 feet or 1200m).
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CCI-22 Dual Channel Party-Line Interface Instruction Manual
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1-4
CCI-22 Dual Channel Party-Line Interface Instruction Manual
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2
INSTALLATION
INTRODUCTION
This chapter describes the installation of the CCI-22 dual party-line
interface, including setting internal jumpers, wiring to external devices,
and setting front-panel controls and indicators.
INSTALLATION IN INTERFACE FRAME
To install the CCI-22 interface module in the IMF-3 or IMF-102
interface frame:
1. Select a slot in which to install the interface.
2. Remove the blank plate covering the slot.
3. Set any Party-Line Termination Jumpers as necessary.
4. Slide the CCI-22 in the slot and ensure that the card is fully seated.
5. Tighten the CCI-22’s front-panel mounting screws.
TERMINATION OF PARTY-LINES
A “Clear-Com termination network” (also known simply as a
“termination”) is a Resistor-Capacitor (RC) circuit that must be
connected between the Audio and Ground lines of any Clear-Com
party-line. To ensure correct operation of the external party-line, only
one termination can be installed on any given party-line.
A party-line termination is normally provided by the component
powering the party-line. Although the CCI-22 is not designed to supply
power to an external party-line system, each channel of the CCI-22
features a Clear-Com termination circuit that can be connected to the
party-line by installing a jumper. This termination network is not
normally connected, and should only be connected in the rare case
that the external party-line does not include a termination circuit. An
example of the use of these termination networks is Figure 2-6 on
page 2-6.
If a party-line has more than one termination circuit, it will not null
correctly (see “Rejection Null Adjustment” on page 2-10). The most
common symptom of this is when the line does not null, even though
the “R” null control has been turned all the way counter-clockwise. If
this happens, check all components connected to the party-line that
are capable of providing a termination to be sure that only one
termination is connected to the party-line.
The two termination circuits on the CCI-22 connect to the channel A
and B party-lines; they are enabled and disabled by the jumpers at
JP100 (which controls the termination circuit for channel A) and JP200
(which controls the termination for channel B). JP100 and JP200 are
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CCI-22 Dual Channel Party-Line Interface Instruction Manual
2-1
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