TC Communications TC8926 User manual

TC8926
8- or 16-Ch.
Hoot-n-holler Bridge
User Manual
MNL-89260-01-00

2 TC8926 Rev 1.0 User Manual
All Rights Reserved
Copyright © 2019 by TC Communications. Products described in this publication are protected
by one or more U.S. and foreign patents.
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The TC Communications® logo is a registered trademark.
JumboSwitch® is a registered trademark of TC Communications.
Other product and brand names may be trademarks or registered trademarks of their respective owners.
Documentation Disclaimer
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any indirect, special, incidental, or consequential damages (including damages for loss of business, loss of profits,
loss of business information, business interruption or other pecuniary loss) arising out of errors in this document.
The information given in this document is reviewed regularly and any necessary corrections will be included in
subsequent editions. We appreciate any suggested improvements. We reserve the right to make technical
improvements without notice.
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translated to another language without the prior written consent of TC Communications.
Record of Revisions
Revision Date Description of Changes
1.0 05/09/19 Initial Release of TC8926.
TC Communications
17881 Cartwright Road
Irvine, California U.S.A. 92614
Tel. [phone]
Fax [phone]
E-Mail: sales @tccomm.com
Website: tccomm.com

TC8926 Rev 1.0 User Manual 3
Guide to Alert Symbols
These alert symbols are used in Caution, Warning, and Danger notes.
Symbol Meaning
Pinching or crushing hazard
Electrical hazard.
Equipment alert: be careful of
damage from static electricity
General alert: used for all
other hazardous conditions
(referring to people, not
equipment).

TABLE OF CONTENTS
TOC-1 TC8926 Rev 1.0 User Manual
1Introduction
1.1 General Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
1.2 Product Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
1.2.1 Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
1.2.2 Applications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4
1.3 Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5
2 Installation
2.1 General Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1
2.2 Unpacking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1
2.3 Equipment Location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1
2.4 Power Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2
2.5 Dry Contact Alarm Relay (DCAR) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2
2.6 System Start Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2
2.7 System Configuration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2
2.7.1 Front Panel (Analog Pin Assignments) . . . . . . . . . . . . . . . . . . . . . . . 2-3
2.7.2 Rear Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3
2.7.3 Electrical Signal Interface Connection & Pin Assignments . . . . . . . . 2-6
3 Troubleshooting
3.1 General. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1
3.2 All LEDs are OFF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1
3.3 Alarm LED . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1
Appendix A 19” Rack Mount Card Cage
A.1 Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-1
A.2 Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-1
A.3 Chassis Ground . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-1
Appendix B Return Policy
B.1 Return Policy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-1
B.1.1 Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-1
B.1.2 Limitation of Liability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-2

TC8926 Rev 1.0 User Manual 1-1
Chapter 1 Introduction
In this chapter:
•Product Description, on page 1-1
•Specifications, on page 1-5
1.1 General Information
This manual is intended to describe the features and functionality in addition to
aiding in the planning, configuring, commissioning and maintaining of the
TC8926 Hoot-n-holler Bridge.
1.2 Product Description
The TC8926 provides the bridging of 4-wire analog audio, forming a traditional
Hoot N Holler system. When connected to hoot phones, the TC8926 bridges the
audio and forms a partyline. Whenever a handset is unmuted, the caller can speak
and broadcast to the everyone in the party.
TC8926 is available in two configurations:
• 8-channel 4-wire analog
• 16-channel 4-wire analog
Diagnostic LEDs are available to quickly identify issues with your analog lines.
Figure 1-1 TC8926 Hoot-n-holler Bridge

Chapter 1 Introduction Product Description
1-2 TC8926 Rev 1.0 User Manual
Figure 1-2 TC8926 Front Panel LED Definitions

Chapter 1 Introduction Product Description
TC8926 Rev 1.0 User Manual 1-3
Figure 1-3 TC8926 Rear Panel LED Definitions (Primary & Secondary)
1.2.1 Features
• 8 CH or 16 CH Hoot-n-holler Bridge
• Modular Design with 8 Channels per Module
• 64K Full Bandwidth Voice Transport
• Passes All Tones used for FSK, EIA Tone Control/Remote and Paging
• Supports Pilot/Guard Tone Operation
• Optional Power Redundancy
• 1U or 4U Rack Mount or 1S Standalone Chassis
• 12VDC, 24VDC, -48VDC, 125VDC
• LEDs for analog volume, alarm status, channel release tone, and loopback

Chapter 1 Introduction Product Description
1-4 TC8926 Rev 1.0 User Manual
1.2.2 Applications
The TC8926 provides the bridging of 4-wire analog audio, forming a traditional
Hoot N Holler system.
Figure 1-4 Typical Application using the TC8926

Chapter 1 Introduction Specifications
TC8926 Rev 1.0 User Manual 1-5
1.3 Specifications
Connection Capacity
600Ω(4-Wire) 8 ports
Electrical
Analog/Dry Contact Connector RJ-11
Impedance 600Ω
System
Visual Indicators System: PWR A, PWR B, Vcc, ALM
Paging: P#, R-Tone
Channel Status:
TX (1 each 600ΩAudio Ports 1-8)
RX (1 each 600ΩAudio Ports 1-8)
Diagnostic Functions Local Loopback
Power Source
Standard 12VDC @500mA
Optional 24VDC, -48VDC, 125VDC, or 100/240VAC
Temperature
Operating -10°C to 50°C
(Optional Hi-Temp Version) -20°C to 70°C
(Optional Extreme-Temp Version) -40°C to 80°C
Storage -40°C to 90°C
Humidity 95% non-condensing

Chapter 1 Introduction Specifications
1-6 TC8926 Rev 1.0 User Manual
Physical (Rack mount 1U “Pizza Box” with two cards)
Height (4.3 cm) 1.7"
Width (48.3 cm) 19"
Depth (26.7 cm) 10.5"

TC8926 Rev 1.0 User Manual 2-1
Chapter 2 Installation
In this chapter:
•Power Supply, on page 2-2
•System Configuration, on page 2-2
2.1 General Information
The installation section describes how to:
• Unpack the unit
• Ensure an optimum site location
• Install the power supply and dry contact connection
2.2 Unpacking
Before unpacking any equipment:
• Inspect all shipping containers for evidence of external damage caused during
transportation
• Inspect for damage after it is removed from the containers
2.3 Equipment Location
The TC8926 should be located in an area that provides adequate light, work space
and ventilation.
IMPORTANT Any claims concerning shipping damage should be made directly to
the pertinent shipping agencies. Any discrepancies should be
reported immediately to the Customer Service Department at TC
Communications, Inc. at [phone].
Important Avoid locating it next to any equipment that may produce electrical
interference or strong magnetic fields, such as elevator shafts or
heavy duty power supplies.
As with any electronic equipment, keep the unit from excessive
moisture, heat, vibration and freezing temperatures.

Chapter 2 Installation Power Supply
2-2 TC8926 Rev 1.0 User Manual
2.4 Power Supply
The TC8926 can be powered by external DC power. Available
power options are 12 VDC, 24 VDC, -48 VDC, and 125 VDC.
There are two terminal block connectors labeled "PWR A" and
"PWR B" only one is required to power up the unit. Since each
TC8926 card is equipped with a power redundancy capability,
the power LEDs on the front panel will light according to
which power jack (A or B) is connected. Both LEDs will light when power
redundancy is utilized.
2.5 Dry Contact Alarm Relay (DCAR)
A terminal block connector at the rear panel provides for the Dry Contact Alarm
Relay. This relay can be used in NO (Normal Open) or NC (Normal Close)
configuration.
When used in NO (Normal Open) configuration, the relay will close if the unit loses
power completely or the Alarm is on. The relay remains open during normal
operation.
When used in NC (Normal Close) configuration, the relay will open if the unit loses
power completely or the Alarm is on. The relay remains close during normal
operation.
2.6 System Start Up
Apply the power by plugging the power plug into a power jack (both PWR A &
PWR B for dual power units).
After power is applied, all LEDs (except PWR & VCC LEDs) will flash
momentarily and the following LED status should be observed from the front and
back panels:
1. The Power "A" and/or "B" and VCC LEDs should be lit.
2.7 System Configuration
The TC8926 has been pre-tested and switches have been set per factory
specifications.
Important Read and only connect a supply voltage that corresponds to the
type plate of your device. Make sure that the contact load capacity
of the signal contact is not exceeded.

Chapter 2 Installation System Configuration
TC8926 Rev 1.0 User Manual 2-3
2.7.1 Front Panel (Analog Pin Assignments)
Figure 2-1 TC8926 Front Panel Analog & Dry Contact Connectors
2.7.2 Rear Panel
Figure 2-2 TC8926 Rear Panel (Main & Extension)
8 RJ-11 Connectors for
Analog connections
(refer to pin assignments
in following sections)

Chapter 2 Installation System Configuration
2-4 TC8926 Rev 1.0 User Manual
2.7.2.1 Rear Panel DIP Switch Functions
The DIP switch functions on the TC8926 are described below. To activate the
function, set the appropriate switch to the “On” (Up) position.
•LOCLB: Local Loopback. This switch (SW1) initiates the Local Loopback
function. The analog signals are received on the “RX Data” pins and looped
back to the ”TX Data” pins for diagnostic testing.
Local Loopback Test (for 4-Wire analog only)
When the rear panel SW1 (LOCLB) in the “On”(Up) position the analog signals are
received on the “Input” pins and looped back to the ”Output” pins on the TC8926.
1. The “TX” LED will be flashing green for that particular channel being tested
and the "ALM" alarm LED will flash to indicate that the unit is in local
loopback mode. (Note, the RX LED will be solidly lit green when an analog
signal is detected.)
2. The Customer’s Analog Device should receive a 6dBm lower audio signal
back as that of the transmitted signal.
3. Upon successful completion of this test, please return DIP switch
SW1(LOCLB) to the “Off” (Down) position..
•P#: Paging Number. This switch (SW2) is used to enable the two channels
broadcast function. "Off" (Down) for only allow single channel to broadcast.
"On" (Up) allows two channels to broadcast simultaneously.

Chapter 2 Installation System Configuration
TC8926 Rev 1.0 User Manual 2-5
•R-Tone: Channel Release Tone. This switch (SW3) is used to enable the unit
to generate a tone after a channel is release (Stop broadcasting). "Off" (Down)
will disable the channel release tone. "On" (Up) will enable the channel
release tone.
•Mode: 8/16 Channel Mode. This switch (SW4) is used to setup the number of
Channels. "Off" (Down) is for 8 channels mode. "On" (Up) is for 16 channels
mode.
•T1, T2: Channel Release Time. These switches are used to set the channel
release time (stop broadcasting) after the channel stop receiving audio.
•V1, V2: Output (Tx) Volume. These switches are used to set the output
volume for all the channels.
SW5, SW6: Channel Release Time
T1 T2 Release Time
Down Down 0.6 sec
Up Down 0.8 sec (Default)
Down Up 1.0 sec
Up Up 1.2 sec
SW7, SW8: Output (Tx) Volume
V1 V2 Volume
Down Down -16 dB
Up Down -10 dB
Down Up -6 dB
Up Up 0 dB (Default)

Chapter 2 Installation System Configuration
2-6 TC8926 Rev 1.0 User Manual
2.7.3 Electrical Signal Interface Connection & Pin Assignments
The RJ-11 connectors are located at the front panel of the TC8926.
2.7.3.1 600ΩAnalog Connections
RJ-11 600ΩAnalog 4-Wire Port Pin Assignment (Normal Mode)
1 Relay or Detector RJ-11 Jack
2 Input RING
3 Output RING
4 Output TIP
5 Input TIP
6 Relay or Detector GND
RJ-11 600ΩAnalog 4-Wire Port Pin Assignment (Reverse Mode)
1 Relay or Detector RJ-11 Jack
2 Output RING
3 Input RING
4 Input TIP
5 Output TIP
6 Relay or Detector GND
6543 12
6543 12

TC8926 Rev 1.0 User Manual 3-1
Chapter 3 Troubleshooting
3.1 General
Under normal operation, PWR, and Vcc LEDs should be lit.
3.2 All LEDs are OFF
If no LEDs are lit on the unit, check the DC power supply, connector plug, and/or
the power source. If the problem persists, contact the Technical Support Department
at TC Communications, Inc. @ [phone].
3.3 Alarm LED
Alarm conditions occur whenever local loopback is enabled and the ALARM LED
will flash.

TC8926 Rev 1.0 User Manual A-1
Appendix A 19” Rack Mount Card Cage
A.1 Features
• 1U height (1.75")
• Universal Power Supply Accepts 90V to 264V AC and 47 to 63 Hz AC
• Standard Power Supply is 12VDC, Optional 24VDC, -48VDC, 125VDC, or
AC Power Supply Available
• Over Load & Short Circuit Protection
A.2 Description
This 1U "Pizza Box" Rack Mount Card Cages hold up to 2 single multiplexer type
cards.
It operates with one power supply. The AC power supply automatically adjusts for
90V to 264V AC input and 47 to 63 Hz operation. The DC power supply accepts
24VDC, -48VDC, or 125VDC input (Optional).
This 1U rack assembly is 19" wide by 1.75" high, and is 9" deep.
A.3 Chassis Ground
The Stand alone and Rack mount chassis provide a connection point for chassis
ground with a dedicated chassis ground screw and lock washer. The chassis ground
screw is located on the rear side of the chassis. This chassis ground connection point
is available in case chassis ground is taken into design consideration by the end user.
   µ     FP 
   µ      FP 
 µ      FP 
µFP 
1U Chassis

TC8926 Rev 1.0 User Manual B-1
Appendix B Return Policy
B.1 Return Policy
To return a product, you must first obtain a Return Material Authorization number
from the Customer Service Department. If the product’s warranty has expired, you
will need to provide a purchase order to authorize the repair. When returning a
product for a suspected failure, please provide a description of the problem and any
results of diagnostic tests that have been conducted.
B.1.1 Warranty
Damages by lightning or power surges are not covered under this warranty.
All products manufactured by TC Communications, Inc. come with a five year
(beginning 1-1-02) warranty. TC Communications, Inc. warrants to the Buyer that
all goods sold will perform in accordance with the applicable data sheets, drawings
or written specifications. It also warrants that, at the time of sale, the goods will be
free from defects in material or workmanship. This warranty shall apply for a period
of five years from the date of shipment, unless goods have been subject to misuse,
neglect, altered or destroyed serial number labels, accidents (damages caused in
whole or in part to accident, lightning, power surge, floods, fires, earthquakes,
natural disasters, or Acts of God.), improper installation or maintenance, or
alteration or repair by anyone other than Seller or its authorized representative.
Buyer should notify TC Communications, Inc. promptly in writing of any claim
based upon warranty, and TC Communications, Inc., at its option, may first inspect
such goods at the premises of the Buyer, or may give written authorization to Buyer
to return the goods to TC Communications, Inc., transportation charges prepaid, for
examination by TC Communications, Inc. Buyer shall bear the risk of loss until all
goods authorized to be returned are delivered to TC Communications, Inc. TC
Communications, Inc. shall not be liable for any inspection, packing or labor costs
in connection with the return of goods.
In the event that TC Communications, Inc. breaches its obligation of warranty, the
sole and exclusive remedy of the Buyer is limited to replacement, repair or credit of
the purchase price, at TC Communications, Inc.’s option.

B Return Policy Return Policy
B-2 TC8926 Rev 1.0 User Manual
To return a product, you must first obtain a Return Material Authorization (RMA)
number and RMA form from the Customer Service Department. If the product’s
warranty has expired, you will need to provide a purchase order to authorize the
repair. When returning a product for a suspected failure, please fill out RMA form
provided with a description of the problem(s) and any results of diagnostic tests that
have been conducted. The shipping expense to TC Communications should be
prepaid. The product should be properly packaged and insured. After the product is
repaired, TC Communications will ship the product back to the shipper at TC's cost
to U.S. domestic destinations. (Foreign customers are responsible for all shipping
costs, duties and taxes [both ways]. We will reject any packages with airway bill
indicating TC communications is responsible for Duties and Taxes. To avoid
Customs Duties and Taxes, please include proper documents indicating the
product(s) are returned for repair/retest).
B.1.2 Limitation of Liability
1. In no event shall the total liability of T C COMMUNICATIONS, INC. to
purchaser and/or end user for all damages including but not limited to
compensatory, consequential and punitive damages, exceed the total amount
paid to T C Communications, Inc. by purchaser for the goods from which the
claim arose, in no event shall T C COMMUNICATIONS, INC. be responsible
for indirect and consequential damages.
2. In no event shall liability attached to T C COMMUNICATIONS, INC. unless
notice in writing is given to T C COMMUNICATIONS, INC. within ten days
of the occurrence of the event giving rise to such claim.
3. T C COMMUNICATIONS, INC. shall not be responsible for delays or non-
deliveries directly or indirectly resulting from or contributed to by foreign or
domestic embargoes, seizure, fire, flood, explosion, strike, act of God,
vandalism, insurrection, riot, war, or the adoption or enactment of any law,
ordinances, regulation, or ruling or order or any other cause beyond the control
of T C COMMUNICATIONS, INC.
4. T C COMMUNICATIONS, INC. shall not be responsible for loss or damage
in transit and any claims for such loss or damage shall be filed by the purchaser
with the carrier.