TC Communications TC8614 User Manual

TC8614

4 CH. 600Ω Analog & Dry

C o nt a ct o ve r T1 / E1

Multiplexer

User Manual

MNL-86140-01-04

TC Communications
17881 Cartwright Road
Irvine, California U.S.A. 92614
Tel. [phone]
Fax [phone]
E-Mail: sales @tccomm.com
Website: www.tccomm.com

All Rights Reserved
Copyright © 2017 by TC Communications. Products described in this publication are protected
by one or more U.S. and foreign patents.

Trademarks

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

This document is provided “as-is” and is to be used only as a general guide. TC Communications disclaims all
warranties, express or implied, regarding the accuracy of the information. TC Communications shall not be liable for
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.

Dissemination or reproduction of this document, or evaluation and communication of its contents, is not authorized
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purposes of patent application or trademark registration. This document contains proprietary information, which is
protected by copyright. All rights are reserved. No part of this document may be photocopied, reproduced or
translated to another language without the prior written consent of TC Communications.

Record of Revisions

Revision Date Description of Changes

1.0

1.1

1.2

1.3

2 TC8614 Rev 1.4 User Manual

01/13/15 Initial Release of TC8614.

08/17/16 Add E1 Support. 2-Channel 4 Wire / 2-Channel 2-Wire mix option

12/12/16 Adding additional Power Supply LED information. Added E1 impedance

04/26/17 Updated Front Panel with AIS and RAI alarm indicators. Added Internal

information. Added T1/E1 local loopback test procedure. Added Chassis
Ground information. Typo fixes.

Clock diagrams.Updated images (PCB layout, product image, line
drawings).

Revision Date Description of Changes

06/02/17 Updated product photos. Updated LED definitions front and rear panels.

1.4

Added Latched Alarm section. Added remote unit status and remote unit
reset section. Add Appendix C for R2 (“Reset Too”) push button and LED
funtions. Move old Appendix C to Appendix D.

TC8614 Rev 1.4 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).

4 TC8614 Rev 1.4 User Manual

TABLE OF CONTENTS

1Introduction

1.1 General Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1

1.2 Product Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1

1.2.1 Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5

1.2.2 Applications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6

1.3 Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7

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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3

2.7.1 Front Panel (Analog & DCCD Pin Assignments) . . . . . . . . . . . . . . . 2-3

2.7.2 Rear Panel (T1/E1 RJ-48F Connector & Pin Assignments) . . . . . . . 2-4

2.7.3 Electrical Signal Interface Connection & Pin Assignments . . . . . . . . 2-7

3 Quick Start Guide

3.1 Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1

3.2 Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1

4 Tutorial

4.1 Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1

4.2 Latched Alarm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2

4.3 Remote Unit Status Monitoring and Remote Unit Alarm Reset . . . . . . . 4-3

4.4 Local Loopback Test (for 4-Wire analog only) . . . . . . . . . . . . . . . . . . . . 4-4

4.5 Remote Loopback Test (for 4-Wire analog only) . . . . . . . . . . . . . . . . . . 4-4

4.6 T1/E1 Local Loopback Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-6

5 Troubleshooting

5.1 General. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1

5.2 All LEDs are OFF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1

5.3 Alarm LED . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1

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 Components Placement

B.1 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-1

Appendix C R2 Button & LED Functions

C.1 R2 (“Reset Too”) Button Description . . . . . . . . . . . . . . . . . . . . . . . . . . . C-1

C.1.1 R2 (“Reset Too”) Push Button Functions . . . . . . . . . . . . . . . . . . . . . C-1

C.2 LED Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-2

TC8614 Rev 1.4 User Manual TOC-1

TABLE OF CONTENTS

Appendix D Return Policy

D.1 Return Policy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-1

D.1.1 Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-1

D.1.2 Limitation of Liability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-2

TOC-2 TC8614 Rev 1.4 User Manual

Chapter 1 Introduction

In this chapter:

• Product Description, on page 1-1

• Specifications, on page 1-7

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
TC8614 600Ω Analog & Dry Contact-over-T1/E1 multiplexer.

1.2 Product Description

The TC8614 is a 4-channel 600Ω Analog & Dry Contact-over-T1/E1 Multiplexer
that allows network managers the flexibility of leveraging their existing T1/E1
circuits by adding low cost analog or dry contact links as needed. It is economical,
simple to install and comes standard with built-in power redundancy.

The TC8614 is available in three configurations:

• 4-Channel 2-Wire Analog with 4-Channel Dry Contact

• 4-Channel 4-Wire Analog with 4-Channel Dry Contact

• 2-Channel 4-Wire / 2-Channel 2-Wire Analog with 4-Channel Dry Contact

TC8614 Rev 1.4 User Manual 1-1

Chapter 1 Introduction Product Description

Diagnostics are extensive and include DIP switches for Local & Remote Loopback
and other application configuration switches. Each unit also provides multiple LEDs
for Alarm, Power, Vcc, T1/E1 Status, and RX/TX or DET/RLY LEDs for each
channel.

The built-in Sync mechanism verifies both device and T1/E1 link operation. No
other test equipment is required for link and device verification.

The TC8614 is compatible with standard 100Ω T1 for copper line lengths up to
3000ft and up to 2.5km for 75Ω / 120Ω E1 (copper line length is the distance
between the TC8614 and the T1/E1 cross-connect). The T1/E1 uses a RJ-48F
connector and the analog and dry contact channels use RJ-11 connectors. Optional
BNC adapter cable is available for 75 Ohm E1. Power is 12VDC standard or
optional 24VDC, -48VDC, 125VDC, or 115/230VAC with an external power cube.
Optionally, a high temperature version (-20°C to 70°C) and extreme temperature
version (-40°C to 80°C) are also available.

1-2 TC8614 Rev 1.4 User Manual

Chapter 1 Introduction Product Description

Figure 1-1 TC8614 600Ω Analog & Dry Contact Over T1/E1 Multiplexer

TC8614 Rev 1.4 User Manual 1-3

Chapter 1 Introduction Product Description

Figure 1-2 TC8614 Front Panel LED Definitions

1-4 TC8614 Rev 1.4 User Manual

Chapter 1 Introduction Product Description

Figure 1-3 TC8614 Rear Panel LED Definitions

1.2.1 Features

• 4-channel 600Ω Analog & 4-channel Dry Contact

• Two or Four Wire Analog

• T1 Features:

• ESF Framing Support (SF Framing, Optional)

• Supports Line Length up to 3000ft (T1)*

• 24 timeslots (DS0) 1-24. TC8614 utilizes timeslots 1, 7, 12, 13, 19, and
24

• E1 Features:

• Supports Line Length up to 2.5km

• PCM31C Framing Support (PCM30, PCM30C, PCM31 Optional)

• 32 timeslots 1-32. TC8614 utilizes timeslots 2, 9, 16, 18, 25, and 32

TC8614 Rev 1.4 User Manual 1-5

Chapter 1 Introduction Product Description

• Very Low Latency

• Dry contact detectors with Isolated Ground

• LEDs for "RX/TX" or "DET/RLY" (to monitor each channel's analog and dry
contact signal status)

• LEDs for "SYNC", "AMI", "BPV", "LOS", "AIS", "RAI", "CRC" (to monitor
each T1/E1 channel status)

• LEDs for "PWR A," "PWR B," "Vcc," & "ALM" (to monitor each unit's
power supply and alarm condition status)

• Built-in Power Redundancy

• Diagnostic DIP Switches for Local Loopback, Remote Loopback & T1/E1
Loopback Tests.

• Rack Mount or Stand Alone

*Note: For line lengths beyond 655ft additional testing is required.

1.2.2 Applications

The TC8614 600Ω Analog & Dry Contact-over-T1/E1 Multiplexer is typically used
to link or extend various 600Ω analog, audio and intercom devices (e.g. FSK
modems, E&M, teleprotection relay controllers, etc.) and dry contacts over existing
T1/E1 links. It is also used as a backup network to ensure business continuity.

It is also used to improve voice quality and increase system reliability in harsh
environments, to replace unreliable leased phone circuits and to stabilize voice level
settings for 600Ω audio channels.

Figure 1-4 Typical Application using the TC8614

1-6 TC8614 Rev 1.4 User Manual

Chapter 1 Introduction Specifications

1.3 Specifications

Connection Capacity

600Ω (2/4-Wire) 4 ports

Dry Contact 4 ports

Electrical

Analog/Dry Contact Connector RJ-11

T1/E1 Connector RJ-48F

Impedance 600Ω

Dry Contact Interface Specification

Normal open Standard

Normal close Optional

Load Voltage (peak AC) 60V

Load Voltage (DC) 60V

Continuous load current 0.55A

Peak load current 1.2A

Max On Resistance 2.5Ω

Output Capacitance 150pF

System

Bit Error Rate

Visual Indicators PWR A, PWR B, Vcc, ALM, SYNC, AMI, BPV, LOS, AIS,

9

1 in 10

RAI, CRC, RMT

or better

Diagnostic Functions Local Loopback, Remote Loopback, and T1/E1 Loopback

TC8614 Rev 1.4 User Manual 1-7

RX (1 each 600Ω Audio Ports 1-4)

TX (1 each 600Ω Audio Ports 1-4)

DET (1 each Dry Contact Ports 1-4)

RLY (1 each Dr Contact Ports 1-4)

Chapter 1 Introduction Specifications

Power Source

Standard 12VDC @200mA (2.4 Watts)

Optional 24VDC, -48VDC, 125VDC, or 115/230VAC

with an external power cube

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

Physical (Standalone Unit)

Height (3.53 cm) 1.40"

Width (18.14 cm) 7.20"

Depth (24.89 cm) 9.80"

Weight (907g) 2.0 lbs.

Physical (Rack mount 1U “Pizza Box” with two cards)

Height (4.45 cm) 1.75"

Width (48.26 cm) 19"

Depth (22.86 cm) 9"

Weight (1.86 Kg) 4.1 lbs.

1-8 TC8614 Rev 1.4 User Manual

Chapter 2 Installation

In this chapter:

• Power Supply, on page 2-2

• System Configuration, on page 2-3

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

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].

2.3 Equipment Location

The TC8614 should be located in an area that provides adequate light, work space
and ventilation.

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.

TC8614 Rev 1.4 User Manual 2-1

Chapter 2 Installation Power Supply

2.4 Power Supply

The TC8614 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
TC8614 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.

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.

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.

Note: TC8614 cards installed in the 1U rack chassis will not show the
PWR A LED in the “On” lit state and will be Off. This is normal and the
power to the card will be monitored by the VCC LED being “On” lit.

2. The "AMI" LED on the rear panel will be Lit or Off depending on the setting
of the rear panel DIP switch SW4. The LED will be Lit when SW4 is “Off”
(Up) position, set for AMI. The LED will be Off when SW4 is “On” (Down)
position, set for B8ZS (T1) or HDB3 (E1).

2-2 TC8614 Rev 1.4 User Manual

Chapter 2 Installation System Configuration

4 RJ-11 Connectors for
Dry Contact connections
(refer to pin assignments
in following sections)

4 RJ-11 Connectors for
Analog connections
(refer to pin assignments
in following sections)

3. The "ALM" and "SYNC" LEDs on the front panel will be flashing indicating
that the T1/E1 connection is not established. This is normal when T1/E1
connection has not been established.

2.7 System Configuration

The TC8614 has been pre-tested and switches have been set per factory
specifications.

2.7.1 Front Panel (Analog & DCCD Pin Assignments)

Figure 2-1 TC8614 Front Panel Analog & Dry Contact Connectors

TC8614 Rev 1.4 User Manual 2-3

Chapter 2 Installation System Configuration

Note 1: The T1/E1 signal use the same pin connections on the RJ-48 female connector.
Note 2: The T1/E1 signal is bipolar, independent of the polarity.

2.7.2 Rear Panel (T1/E1 RJ-48F Connector & Pin Assignments)

An RJ-48 female connector is provide on the rear panel for the connection of the T1/
E1 wire pairs. When viewing the RJ-48F connector, the left pair (Pin # 1 & 2) of the
RJ-48F connector are for T1 or E1 signal going into the TC8614 (receive), while the
right pair (Pin # 4 & 5) of the RJ-48F connector are for the transmit signal coming
out of the unit, refer to diagram below.

Figure 2-2 TC8614 Rear Panel T1/E1 Connector & Pin Assignment

2-4 TC8614 Rev 1.4 User Manual

Chapter 2 Installation System Configuration

2.7.2.1 Rear Panel DIP Switch Functions

The DIP switch functions on the TC8614 are described below. To activate the
function, set the appropriate switch to the “On” (Down) 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.

• RMTLB: Remote Loopback. This switch (SW2) initiates the Remote
Loopback function. Enabling this switch on the local unit triggers the remote
loopback function on the remote unit.

• INT CLK: Internal Clock. This switch (SW3) is used to setup the T1 timing
mode. "On" for internal timing mode. "Off " for RX loop timing mode.

• B8ZS /HDB3: This switch (SW4) is used to setup the T1/E1 Line Code. "On"
for B8ZS(T1) or HDB3(E1). “Off” for AMI.

• DIS ALM: This switch (SW5) is used to disable the audio buzzer and dry
contact alarm relay. “On” (Down) position disables the buzzer and relay. “Off”
enables the buzzer and relay. "DIS ALM" dip switch should be in “Off” under
normal condition.

• L1, L2, L3: These switches (SW6, SW7, & SW8) are used to set the T1/E1
crossconnect distance (copper line build-out/impedance).

For example, in a T1/E1 application, this is the length of twisted pair cable
connecting the TC8614 to the user's equipment, which may be a CSU or DSU. See
Table 2-1 and Table 2-2 below.

Table 2-1: Copper Line Length Setup Table

T1 Settings

L1 L2 L3 Application Line Length

Up Up Up DSX-1 (0 to 133 feet) / 0 dB CSU

Down Up Up DSX-1 (134 to 266 feet)

Up Down Up DSX-1 (267 to 399 feet)

Down Down Up DSX-1 (400 to 533 feet)

Up Up Down DSX-1 (534 to 655 feet)

TC8614 Rev 1.4 User Manual 2-5

Chapter 2 Installation System Configuration

T1 Settings

Down Up Down -7.5 dB CSU

Up Down Down -15 dB CSU

Down Down Down -22.5 dB CSU

Table 2-2: E1 Termination Setup Table

E1 Settings

L1 L2 L3 Application Termination

Up Up Up 75 Ohm Normal

Down Up Up 120 Ohm Normal

Up Up Down 75 Ohm High Loss

Down Up Down 120 Ohm High Loss

2-6 TC8614 Rev 1.4 User Manual

Chapter 2 Installation System Configuration

6543 12

6543 12

2.7.3 Electrical Signal Interface Connection & Pin Assignments

The RJ-11 connectors are located at the front panel of the TC8614.

2.7.3.1 600Ω Analog Connections

These ports allow you to transport the 600Ω (2/4 Wire) signals over T1/E1.

RJ-11 600Ω Analog 4-Wire Port Pin Assignment

1N/A

2 Input RING

3 Output RING

4 Output TIP

5 Input TIP

6N/A

RJ-11 600Ω Analog 2-Wire Port Pin Assignment

1

2

N/A RJ-11 Jack

N/A

RJ-11 Jack

3 Input/Output

4 Input/Output

5

6

Important

When 2-Channel 4-Wire / 2-Channel 2-Wire Analog is ordered, 4-Wire
is always on Channel 1 & 2, 2-Wire will be on Channel 3 & 4.

TC8614 Rev 1.4 User Manual 2-7

N/A

N/A

Chapter 2 Installation System Configuration

6543 12

2.7.3.2 Dry Contact Ports

For dry contact closure applications, the TC8614 can be used as either the Closure
Detector or Relay depending on which pins are used.

By default, the dry contact Relay will open when T1/E1 link is not in sync.
(Optional factory setting: Dry contact Relay will retain the last good state when T1/
E1 link is not in sync.)

RJ-11 Dry Contact Relay Pin Assignment

Pin Connection RJ-11 Jack

1N/A

2Relay

3Relay

4 Detector

5 Detector GND

6N/A

• The Closure Detector side has a dry contact closure detector.

• The Receiver side has a dry contact Relay.

The Close or Open status is controlled by a relay switch inside the card. It reflects
the remote detector's status. The virtual pin connections allow the TC8614 to be
used as either a closure detector or a dry contact relay. (See Dry Contact Closure

Detector, on page 2-9)

• The RJ-11's pins 4 and 5 are closed at the closure detector side, the status is
reflected at the remote relay side of the RJ-11's pins 2 and 3.

• The Relay switch is rated 1.5A DC maximum switching current with a
maximum voltage of 60 VDC. (See Specifications, on page 1-7.)

2-8 TC8614 Rev 1.4 User Manual

Chapter 2 Installation System Configuration

Figure 2-3 Dry Contact Closure Detector

TC8614 Rev 1.4 User Manual 2-9

Chapter 3 Quick Start Guide

3.1 Introduction

The TC8614 is designed for quick and easy installation. First, configure the unit for
your specific application by setting the Line Code and Line Length. Once
configured, you can connect the Analog or Dry Contact, T1/E1 signal source and
power.

3.2 Setup

1. Select the appropriate Line Code for your application with the rear panel DIP
switch SW4. “On” (Down) for B8ZS(T1) or HDB3(E1) and “Off” (Up) for
AMI .

2. For T1 applications, set the Copper Line Length with the rear panel DIP switch
SW6, SW7, & SW8. Generally, it will be factory set to "0-133 feet." (Refer to

Copper Line Length Setup Table, on page 2-5)

3. For E1 applications, set the proper impedance for your application with the
rear panel DIP switch SW6, SW7, & SW8. Generally, it will be factory set to
“75 ohm.” (E1 Termination Setup Table, on page 2-6)

4. Set the appropriate T1/E1 timing mode with rear panel DIP switch SW3. There
should be one and only one clock source throughout the entire T1/E1 network.
If two TC8614 units are connected back to back, one unit should set
to“Internal” timing mode, and the other unit should set to “RX Loop” timing
mode.

“On” for internal timing mode

TC8614 Rev 1.4 User Manual 3-1

Chapter 3 Quick Start Guide Setup

“Off” for Rx loop timing mode

5. Verify the analog/dry contact pin connections as well as the T1/E1 pin
connections. After that, connect the two TC8614 units with a T1/E1 cable.

6. After the T1/E1 connection is established, the front panel "ALM" LED should
be off and the "SYNC" LED should be lit solidly.

7. If the front panel "ALM" LED is solidly lit, press and hold the "R2" (“Reset
Too”) button for 3 seconds until the "ALM", "BPV", "CRC", and "SYNC"
LEDs are flashing. The alarm will reset after the "R2" button is released.

8. Connect the analog/dry contact signal source to the TC8614 Port 1 RJ-11
connector.

9. Verify the corresponding channel's "RX" LED is solidly lit to indicate that
audio signal is being received. If the "RX" LED does not light up solidly on a
particular channel, it usually indicates incorrect connections at the RJ-11 input
port (Please double-check your connections and verify them with the pin
assignments table see 2.7.3.1, 600Ω Analog Connections, on page 2-7

TC8614 Rev 1.4 User Manual 3-2

Chapter 4 Tutorial

In this chapter:

• Local Loopback Test (for 4-Wire analog only), on page 4-4

• Remote Loopback Test (for 4-Wire analog only), on page 4-4

• T1/E1 Local Loopback Test, on page 4-6

4.1 Introduction

It is highly recommended to conduct bench tests before actual installation. Bench
testing allows the user to become familiar with all the functions and features of the
TC8614 in a controlled environment. Knowledge of these functions and features
will ease installation and troubleshooting efforts later on.

Loopback tests assist troubleshooting by helping in pinpointing the source of errors.
The TC8614 is a sophisticated product designed with multiple advanced
technologies. Loopback tests have been implemented to test independent
components of it.

TC8614 Rev 1.4 User Manual 4-1

Chapter 4 Tutorial Latched Alarm

4.2 Latched Alarm

The front panel "ALM", "BPV", "CRC" and "SYNC" LEDs can display both
current and latched error conditions.

For example, if the "ALM" LED is on, and "SYNC" LED blinks twice, it indicates
that there are two "T1/E1 sync loss" after the last alarm reset.

To reset the alarm, press and hold the "R2" ("Reset Too") button for 3 seconds until
the "ALM", "BPV", "CRC", and "SYNC" LEDs are flashing. The alarm will reset
after the "R2" button is released.

See the table below for latched alarm definitions,

LED Normal Current Error Latched Error Note

ALM Off Flashing

Continuously

BPV Off Flashing

Continuously

CRC Off Flashing

Continuously

SYNC On Flashing

Continuously

On

Blink The number of blinks

indicates the number of
times the error condition
happens. (Max. 3 Blinks)

Blink The number of blinks

indicates the number of
times the error condition
happens. (Max. 3 Blinks)

Blink The number of blinks

indicates the number of
times the error condition
happens. (Max. 3 Blinks)

TC8614 Rev 1.4 User Manual 4-2

Chapter 4 Tutorial Remote Unit Status Monitoring and Remote Unit Alarm Reset

4.3 Remote Unit Status Monitoring and Remote
Unit Alarm Reset

TC8614 is capable of monitoring the remote unit status and resetting the remote unit
alarm condition.

Short press (less than 3 seconds) the "R2" button will toggle between local and
remote status display.

"RMT" LED Off: Display Local Status

"RMT" LED On: Display Remote Status

To monitor remote unit status:

1. Check if T1/E1 connection is synched ("SYNC" LED is solidly lit).

2. Short press (< 3 secs) the "R2" button and the "RMT" LED should be lit to

indicate it is displaying remote unit status.

3. When "RMT" LED is lit, "ALM", "BPV", "CRC", and "SYNC" LEDs will be

displaying remote unit status.

4. The "RMT" LED will turn off automatically after 20 seconds and switch back

to local status display.

To reset remote unit alarm condition:

1. Check if T1/E1 connection is synched ("SYNC" LED is solidly lit).

2. Short press (< 3 secs) the "R2" button and the "RMT" LED should be lit to

indicate it is displaying remote unit status.

3. Press and hold the "R2" button for 3 seconds until the "ALM", "BPV", "CRC",

and "SYNC" LEDs are flashing. The remote unit alarm will reset after the
"R2" button is released.

4. The "RMT" LED will turn off automatically after 20 seconds and switch back

to local status display.

4-3 TC8614 Rev 1.4 User Manual

Chapter 4 Tutorial Local Loopback Test (for 4-Wire analog only)

4.4 Local Loopback Test (for 4-Wire analog only)

When the rear panel SW1 (LOCLB) in the “On”(Down) position the analog signals
are received on the “Input” pins and looped back to the ”Output” pins on the
TC8614.

1. The “TX” LED will be flashing amber 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 TX LED will be lit green when TX activity is
detected.)

2. The Customer’s Analog Device should receive audio signal back as

transmitted.

3. Upon successful completion of this test, please return DIP switch

SW1(LOCLB) to the “Off” (Up) position..

4.5 Remote Loopback Test (for 4-Wire analog only)

1. Connect the local and remote TC8614 units as shown on the diagram below.

(Note, testing for Analog Port 1 will be shown, Analog Ports 2-4 can be tested
with the same setup.)

2. Connect the T1/E1 connections as shown on the diagram below. Be sure to

make the correct pin connections, refer to Figure 2-2, TC8614 Rear Panel T1/

E1 Connector & Pin Assignment, on page 2-4 for pin assignments.

3. Verify that both TC8614 units have the same Line Code and Line Length

settings.

4. The local unit should be set as "Internal" timing mode (SW3 Down) and the

remote unit as “RX Loop” timing mode (SW3 Up). T1/E1 sync should be
established and “SYNC” LED should be solidly lit on both units.

TC8614 Rev 1.4 User Manual 4-4

Chapter 4 Tutorial Remote Loopback Test (for 4-Wire analog only)

5. On the local TC8614, set DIP switch SW2 (Remote Loopback) to the “On”

(Down) position. Observe that the "ALM" alarm LED will flash indicating that
the unit is in (remote loopback) mode. The "RX," and "TX" LEDs on local unit
Analog Port 1 should be solidly lit indicating the analog signal is looped back
as shown on diagram below.

6. On the remote TC8614, observe that the "ALM" alarm LED will flash

indicating that the unit is in (remote loopback) mode. The “TX” LED will be
solidly lit. The "RX" LED will be flashing amber.

7. The Customer’s Analog Device should receive audio signal back as

transmitted.

8. Upon successful completion of this test, return SW2 on the local unit to the

“Off” (Up) position.

4-5 TC8614 Rev 1.4 User Manual

Chapter 4 Tutorial T1/E1 Local Loopback Test

4.6 T1/E1 Local Loopback Test

A T1/E1 Local loopback is used to test T1/E1 wiring and T1/E1 transceiver
functionality. It can be enabled by pushing both rear panel DIP switches SW1 &
SW2 to the “On” (Down) position. The diagram below shows the T1/E1 signal flow
and related loopback path.

1. The “ALM” LED should be flashing indicating the unit is in T1/E1 Loopback

mode.

2. The “LOS” LED should be off indicating that a valid T1/E1 signal is being

received. If the “LOS” LED is flashing it means that the TC8614 is not
receiving a valid T1/E1 or the T1/E1 cable is in question. Please reference
Figure 2-2, TC8614 Rear Panel T1/E1 Connector & Pin Assignment, on
page 2-4 for T1/E1 pinouts.

3. The T1/E1 signal should be looped back to the Carrier/Service Provider or T1/

E1 tester. Please make sure a valid T1/E1 signal is being received.

4. Upon successful completion of this test, please return dip switches

SW1(LOCLB) and SW2(RMTLB) to the “Off ”(Up) position for normal
operation of the TC8614 unit(s).

TC8614 Rev 1.4 User Manual 4-6

Chapter 5 Troubleshooting

5.1 General

Alarm conditions occur whenever a T1/E1 sync "fault" condition is detected by the
TC8614. Under normal operation, PWR, Vcc, and SYNC LEDs should be lit.

5.2 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].

5.3 Alarm LED

The ALARM LED will flash when the unit has any loopbacks enabled. It will be
solid when alarm conditions are present such as T1/E1 loss of frame (no SYNC) or
T1/E1 loss of signal (LOS).

TC8614 Rev 1.4 User Manual 5-1

Appendix A 19” Rack Mount Card Cage

1.75” (4.45 cm)

17.3” (43.94 cm)

9” (22.86 cm)

19” (48.26 cm)

TCRM195

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

The TCRM195 "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).

The rack assemblies are 19" wide by 1.75" high. The TCRM195 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.

TC8614 Rev 1.4 User Manual A-1

Appendix B Components Placement

B.1 Overview

Figure B-1 TC8614 PCB Layout

TC8614 Rev 1.4 User Manual B-1

Appendix C R2 Button & LED Functions

C.1 R2 (“Reset Too”) Button Description

The recent enhancements implemented on the TC8614 (Analog/Dry Contact over
T1/E1) will make troubleshooting a much easier process. The alarm LEDs - BPV,
CRC, and SYNC - can now latch abnormal conditions until they are reset by the
user. These functions are realized in part by the newly added "R2" ("Reset Too")
push button.

The "R2" push button is for displaying remote unit LED status and to reset local or
remote error and alarm LEDs.

C.1.1 R2 (“Reset Too”) Push Button Functions

R2 push button:

1. To reset the local unit's alarm LEDs, hold down the R2 button for at least 3

seconds until you see the alarm LEDs flash in sequence.

2. To display the remote unit's alarm LEDs on the local unit, briefly press the R2

button on the local unit. The local unit's RMT LED will subsequently turn on
and whatever alarm LEDs are being displayed on the remote unit will now be
displayed on the local unit's alarm LEDs.

3. To reset the remote unit's alarm LEDs from the local unit, while the RMT LED

is lit on the local unit, hold down the local unit's R2 button for at least 3
seconds until you see the alarm LEDs flash in sequence.

Automatic return to local alarm LED status:

Upon briefly pressing the R2 button on a local unit, the local unit will remain in
remote alarm LED status (RMT LED is on) for 20 seconds, after which the local
unit will automatically revert back to local alarm LED status.

TC8614 Rev 1.4 User Manual C-1

C R2 Button & LED Functions LED Functions

C.2 LED Functions

RMT: displays the remote unit's LED status on the local unit

BPV: displays bi-polar violation(s) for the ingress T1/E1 signal

CRC: displays error(s) in data integrity (only for T1 ESF frame and E1 built-in

CRC)

SYNC: displays frame locking for T1 (ESF framing) or E1 (PCM31C framing)

The alarm LEDs - BPV, CRC and SYNC - all have a latching functionality to
indicate the number of occurrences for each error. These LEDs will continuously
flash at regular intervals until reset by the user. The behavior is noted here:

• When an LED blinks once, it indicates a single error has occurred once. When

an LED blinks twice, it indicates the error has occurred twice. When the LED
blinks 3 times, it indicates the error has occurred 3 or more times.

The 600Ω Analog Tx and Rx LEDs are tied to a volume threshold level of -31dBm;
when the volume is greater than -31dBm, the LED(s) will turn on.

C-2 TC8614 Rev 1.4 User Manual

Appendix D Return Policy

D.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.

D.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.

TC8614 Rev 1.4 User Manual D-1

D Return Policy Return Policy

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).

D.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.

D-2 TC8614 Rev 1.4 User Manual

Index

C

cabling, 2-3

D

DCAR, 2-2

dry contact ports, 2-8

E

electrical, 5-1

environmental

requirements, 2-1

F

front panel, 2-2

T

troubleshooting, 4-1, 5-1

U

unpacking, 2-1

W

web

interface, 1-7

L

LED verification sequence

power-up, 4-4

M

mechanical

installation, 2-2

P

power

unit, 2-2

power-up LED verification sequence, 4-4

S

specifications, 1-7

TC8614 Rev 1.4 User Manual Index-1