Zentron 6300 User manual

Model 6300 IP Gateway
025-9631D.1

Software License
The Zetron software described in this manual is subject to the terms and conditions of Zetron’s Software License
Agreement, a copy of which is contained on the product distribution media or otherwise provided or presented to buyer.
Installation and/or use of the Zetron software constitutes acceptance of Zetron’s Software License Agreement.
Contains software BSD Unix, Copyright © 1980, 1983, 1988, 1993 The Regent of the University of California. All rights
reserved.
Contains GoAhead Webserver, Copyright © 2003 GoAhead Software, Inc. All Rights Reserved.
Limited Warranty
Buyer assumes responsibility for the selection of the Products to achieve buyer’s or its customer’s intended results obtained
from the Products. If buyer has provided Zetron with any requirements, specifications or drawings, or if Zetron provides
buyer with such materials, such materials are provided solely for buyer’s convenience and shall not be binding on Zetron
unless agreed in writing by the President of Zetron. ZETRON DOES NOT WARRANT THAT THE PRODUCTS OR ITS
CUSTOMER’S REQUIREMENTS OR SPECIFICATIONS OR THAT OPERATION OF THE PRODUCTS WILL BE
UNINTERRUPTED OR ERROR FREE. SUBJECT TO THE LIMITATIONS SET FORTH BELOW, Zetron warrants that
all Zetron Products and Zetron Accessories will be free from material defects in material and workmanship for one year
from date of shipment (except where indicated otherwise in the Zetron Price Book). For buyer’s convenience, Zetron may
purchase and supply additional items manufactured by others. In these cases, although Zetron’s warranty does not apply,
buyer shall be the beneficiary of any applicable third party manufacturer’s warranties, subject to the limitations therein.
Zetron’s warranty covers parts and Zetron factory labor. Buyer must provide written notice to Zetron within the warranty
period of any defect. If the defect is not the result of improper or excessive use, or improper service, maintenance or
installation, and if the Zetron Products or Zetron Accessories have not been otherwise damaged or modified after shipment,
AS ZETRON'S SOLE AND EXCLUSIVE LIABILITY AND BUYER’S SOLE AND EXCLUSIVE REMEDY, Zetron
shall either replace or repair the defective parts, replace the Zetron Products or Zetron Accessories, or refund the purchase
price, at Zetron’s option, after return of such items by buyer to Zetron. Shipment shall be paid for by the buyer. No credit
shall be allowed for work performed by the buyer. Zetron Products or Zetron Accessories which are not defective shall be
returned at buyer’s expense, and testing and handling expense shall be borne by buyer. Out-of-warranty repairs will be
invoiced at the then - current Zetron hourly rate plus the cost of needed components. THE FOREGOING WARRANTY
AND THE THIRD PARTY MANUFACTURER'S WARRANTIES, IF ANY, ARE IN LIEU OF ANY AND ALL OTHER
WARRANTIES EXPRESSED, IMPLIED OR ARISING UNDER LAW, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES OF MERCHANTABILITY, NON-INFRINGEMENT AND FITNESS FOR A PARTICULAR
PURPOSE.
Limitation of Liability
Zetron makes no representation with respect to the contents of this document and/or the contents, performance, and function
of any accompanying software. Further, Zetron reserves the right to revise this document or the accompanying software and
to make changes in it from time to time without obligation to notify any person or organization of such revisions or changes.
ZETRON SHALL NOT UNDER ANY CIRCUMSTANCES BE LIABLE TO BUYER OR ANY THIRD PARTY FOR
ANY INCIDENTAL, SPECIAL, CONSEQUENTIAL OR INDIRECT LOSS OR DAMAGE ARISING OUT OF OR
CONNECTED WITH BUYER’S PURCHASE OR USE OF PRODUCTS OR SERVICES, INCLUDING WITHOUT
LIMITATION, LOSS OF USE, LOSS OR ALTERATION OF DATA, DELAYS, LOST PROFITS OR SAVINGS, EVEN
IF ZETRON HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES AND EVEN IF THE LIMITED
REMEDY ABOVE IS FOUND TO FAIL OF ITS ESSENTIAL PURPOSE. IN NO EVENT SHALL ZETRON’S
LIABILITY (WHETHER FOR NEGLIGENCE OR OTHER TORT, IN CONTRACT OR OTHERWISE) EXCEED THE
PRICE PAID TO ZETRON FOR THE PRODUCTS.
IP networks by their nature are subject to a number of limitations, such as security, reliability, and performance. Anyone
using non-dedicated IP networks, such as shared WANs or the Internet, to connect to any Zetron Products or systems should
consider and is responsible for these limitations.
© Zetron, Inc. All rights reserved. This publication is protected by copyright; information in this document is subject to
change without notice. Zetron and the Zetron logo are registered trademarks of Zetron, Inc. Other company names and
product names may be the trademarks or registered trademarks of their respective owners. This publication may not be
reproduced, translated, or altered, in whole or in part, without prior written consent from Zetron, Inc.

Regulatory Compliance
FCC Class A User Information
This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to Part 15 of the
FCC Rules. These limits are designed to provide reasonable protection against harmful interference when the equipment is
operated in a commercial environment. This equipment generates, uses, and can radiate radio frequency energy and, if not
installed and used in accordance with the instruction manual, may cause harmful interference to radio communications.
Operation of this equipment in a residential area is likely to cause harmful interference in which case the user will be
required to correct the interference at his own expense.
EMC Compliance Standards
This product meets the requirements of the standards listed below.
•FCC Part 15 – Radiated & Conducted Emissions (USA)
•ICES-003 – Radiated & Conducted Emissions (Canada)
•EN 55022 – Radiated & Conducted Emissions (Europe & Australia)
•EN 55024 – Immunity (Europe)
Regulatory Compliance Markings
Product Certification Markings:
•FCC Part 15 (USA)
•CE (Europe)
•C-tick (Australia)
3

Safety Summary
Warning! For your safety and the protection of the equipment, observe these
precautions when installing or servicing Zetron equipment.
•Follow all warnings and instructions marked on the equipment or included in documentation.
•Only technically qualified service personnel are permitted to install or service the equipment.
•Be aware of and avoid contact with areas subject to high voltage or amperage. Because some components can
store dangerous charges even after power is disconnected, always discharge components before touching.
•Never insert objects of any kind through openings in the equipment. Conductive foreign objects could produce a
short circuit that could cause fire, electrical shock, or equipment damage.
•Remove rings, watches, and other metallic objects from your body before opening equipment. These could be
electrical shock or burn hazards.
•Ensure that a proper electrostatic discharge device is used, to prevent damage to electronic components.
•Do not attempt internal service of equipment unless another person, capable of rendering aid and resuscitation, is
present.
•Do not work near rotating fans unless absolutely necessary. Exercise caution to prevent fans from taking in
foreign objects, including hair, clothing, and loose objects.
•Use care when moving equipment, especially rack-mounted modules, which could become unstable. Certain
items may be heavy. Use proper care when lifting.
Change List for Rev D, 21 February 2012
•Corrected Hi-Z and Lo-Z impedance values on page 41.
Change List for Rev D.1, 5 April 2012
•Fixed IP address typo on page 37.
4025-9631D.1

Contents
Contents
Introduction.......................................................................................................8
System Overview................................................................................................................... 8
Specifications......................................................................................................................... 9
Physical Dimensions...................................................................................................... 9
Inputs and Outputs....................................................................................................... 10
Cable............................................................................................................................ 11
Environmental and Power Requirements .................................................................... 11
Mean Time Between Failures ...................................................................................... 11
Compatibility ........................................................................................................................ 11
Operator Control Equipment ........................................................................................ 11
Radio Compatibility ...................................................................................................... 12
Network Compatibility .................................................................................................. 12
Licensed Features ...............................................................................................................13
Safety................................................................................................................................... 13
Important Safety Information........................................................................................ 13
Read Instructions ......................................................................................................... 13
Heed Warnings ............................................................................................................ 14
Mounting ...................................................................................................................... 14
Power Sources and Grounding.................................................................................... 14
Physical Installation .......................................................................................16
Overview .............................................................................................................................. 16
Required Tools..................................................................................................................... 16
Mounting .............................................................................................................................. 17
DIP Switches........................................................................................................................ 18
Jumpers ............................................................................................................................... 19
Connections ......................................................................................................................... 20
Power Port ................................................................................................................... 20
Balanced Audio Port .................................................................................................... 20
Link 1 and Link 2 Ports ................................................................................................ 21
Network Port ................................................................................................................ 21
System Configuration.....................................................................................22
Startup ................................................................................................................................. 22
IP Gateway LEDs ................................................................................................................ 22
5

Model 6300 IP Gateway
Initial Configuration.............................................................................................................. 23
First-Time IP Configuration ......................................................................................... 23
HTTP Configuration..................................................................................................... 24
Recommended Analog Line Settings ........................................................... 28
Overview ............................................................................................................................. 28
4-Wire/Tone Remote Control Configuration........................................................................ 29
6-Wire/Local Control Configuration ..................................................................................... 29
8-Wire/E&M Control/Radio Bridging Configuration ............................................................. 30
Connecting Two IP Gateways ....................................................................... 31
Overview ............................................................................................................................. 31
Configuring Two IP Gateways on a Local Area Network (LAN).......................................... 31
System Parameters for Model 6300 #1:...................................................................... 32
Link 1 Parameters for Model 6300 #1: ........................................................................ 32
System Parameters for Model 6300 #2:...................................................................... 33
Link 1 Parameters for Model 6300 #2: ........................................................................ 33
Summary of Settings ................................................................................................... 34
Configuring Two IP Gateways on a Wide Area Network (WAN)......................................... 35
System Parameters for Model 6300 #1:...................................................................... 35
Link 1 Parameters for Model 6300 #1: ........................................................................ 36
System Parameters for Model 6300 #2:...................................................................... 36
Link 1 Parameters for Model 6300 #2: ........................................................................ 36
Router/Firewall Configuration...................................................................................... 37
About Dynamic IP Addresses...................................................................................... 38
Link Configuration ......................................................................................... 39
Overview ............................................................................................................................. 39
Maintenance ................................................................................................... 44
Overview ............................................................................................................................. 44
Configuration Settings File .................................................................................................. 44
Link Status........................................................................................................................... 46
Option Installation................................................................................................................ 46
Versions............................................................................................................................... 48
Audio Level Adjustment ................................................................................ 49
Receive Level Adjustment................................................................................................... 49
Transmit Level Adjustment.................................................................................................. 50
Appendix A: Keys to a Successful Mission-Critical VoIP Installation....... 52
Overview ............................................................................................................................. 52
The Right IP Network .......................................................................................................... 52
LAN vs. WAN Bandwidth..................................................................................................... 53
Data vs. Voice Traffic ..........................................................................................................53
Shared Private vs. Public Networks .................................................................................... 54
The Right Knowledge.......................................................................................................... 56
Non-Critical Applications ..................................................................................................... 57
6025-9631D.1

Contents
7
Using the Internet ................................................................................................................ 57
Index ................................................................................................................58

Introduction
Introduction
This manual provides procedures and reference information used to install and configure
the Zetron Model 6300 IP Gateway.
Note All instructions in this manual assume that the user is reasonably
experienced with installation of radio and telecommunication
equipment. Persons without proper knowledge, skills, or
authorization must not be allowed to install this equipment.
System Overview
The Zetron Model 6300 IP Gateway is a “Radio over IP” (RoIP) device that provides a
means of connecting radio consoles with radios, or radios with radios by way of an IP
network instead of traditional dedicated wire connections or microwave radio. The IP
Gateway transports analog wireline two-way radio control circuits over IP network by
converting audio and control information into IP packets, routing them over an IP
network, and converting them back into useful form.
Each Model 6300 IP Gateway supports one or two radio circuits (the Model 6301
supports one circuit, the Model 6302 supports two circuits), with each circuit supporting
analog audio, binary control (PTT & COR), and RS-232 serial data. The analog audio is
field selectable between a balanced 4-wire connection suitable for most fixed station
radios, and unbalanced transmit and receive audio suitable for direct connection to most
mobile radios. In many cases, a mobile radio’s programming and/or control head serial
data can be transported over IP as well (contact Zetron for radio serial data
compatibility). A pair of RoIP Gateways is thus able to transport one or two analog radio
circuits across an IP network. The maximum number of links is only limited by network
bandwidth and quality.
A pair of Model 6300 IP Gateways is used to provide a radio communication link over
IP. One IP Gateway resides at the console and the other resides at the radio.
8025-9631D.1

Specifications
The following figure provides two simple examples of the Model 6300 used to connect
legacy radio equipment and intercoms across an IP network.
Figure 1 – Model 6300 example configurations
IP Network
LAN
Local Control
Radios
Operator Control
Equipment
Model 6300
IP Gateway
Model 6300
IP Gateway
IP Network
LAN
Intercom
(Hoot ‘n Holler /
Squawk Box)
Model 6300
IP Gateway
Model 6300
IP Gateway
Intercom
(Hoot ‘n Holler /
Squawk Box)
Specifications
Physical Dimensions
Rack-mounted
IP Gateways are preferably mounted to a 19-inch rack-mount plate located on a rack in a
controlled server environment. Each plate mounts up to two IP Gateways.
Figure 2 – Rack-mounted IP Gateways
Network Power
Model 6300 IP Gateway
Status IP Radio
TX
RX
Link 1
Status
TX
RX
Link 2
IP Radio
Network Power
Model 6300 IP Gateway
Status IP Radio
TX
RX
Link 1
Status
TX
RX
Link 2
IP Radio
Parameter Description
Height: 1.75 inches / 1 rack units
Width: 19 inches
Depth: 10 inches
9

Introduction
Stand-alone
The IP Gateway can also be placed as a stand-alone unit.
Figure 3 – Stand-alone IP Gateways
Network Power
Model 6300 IP Gateway
Status IP Radio
TX
RX
Link 1
Status
TX
RX
Link 2
IP Radio
+13.5VDC/GND A B C D Tone Remote NetworkRadio A Radio B
+13.5VDC/GND
A B C D
Balanced Audio Network Link 2Link 1
Parameter Description
Height: 1.25 inches
Width: 7.5 inches
Depth: 10 inches
Inputs and Outputs
Parameter Description
COR Input Active < 0.8V
Inactive > 2.0V
10K ohm pull-up to 5.0V
PTT Output PTT <10 ohms to ground active,
<100 na to ground when inactive
Sinks 50 ma @ 12VDC
General Purpose I/O
(configured for input)
Active < 1.0V
Inactive > 3.6V
10K ohm pull-up to 5.0V
General Purpose I/O
(configured for output)
Open-drain
Active 10 ohm or less to ground
Sinks 50 ma @ 12VDC
Serial Data I/O Selectable RS-232 levels or TTL levels.
Handshake signals are not supported.
10 025-9631D.1

Compatibility
Cable
CAT5 cable contains four pairs of copper wire. It supports Fast Ethernet speeds (up to
100 Mbps). As with all other types of twisted pair EIA/TIA cabling, CAT5 cable runs are
limited to a maximum recommended run length of 100m (328 feet).
Environmental and Power Requirements
Parameter Description
Power Input +13.5VDC (+10.5 to +16VDC)
Max Power Draw 500mA @ 10.5VDC
Operating Temperature 5 to 55 degrees C (41 to 131 F)
The Model 6300 IP Gateway uses Zetron power supply P/N 950-0406. It is also
compatible with Zetron Redundant 12VDC Power System Kits P/N 950-1142 and
950-1143.
Mean Time Between Failures
Hardware Part Number MTBF (years)1
Model 6300 IP Gateway 901-9681 283
1Using HRD5 model (temperature controlled locations)
Compatibility
Operator Control Equipment
Zetron
The Model 6300 IP Gateway works with the following Zetron consoles and desktop
remotes:
•Model 4010
•Series 4000 (except wireless option for EDACS and iDEN)
•DCS-5020
•Acom System
•Model 280/284 Desktop Remote
11

Introduction
Third Party
The Model 6300 IP Gateway works with most Zetron and third-party (non-Zetron)
consoles providing Tone Remote Control (TRC) or E&M signals. However, there are
some limitations when used with third-party consoles:
•The IP Gateway requires a 4-wire interface to the console; a Tx pair and an Rx
pair. It is not compatible with consoles that only offer a 2-wire connection.
•If used in conjunction with Zetron or third party interfaces or adapters, such as a
Radio Interface Module or Tone Remote Adapter, there may be additional
limitations imposed by those interfaces or adapters.
The Model 6300 IP Gateway also works with non-radio, specialty voice applications (e.g.
hoot-n-holler and intercom lines).
Radio Compatibility
The IP Gateway is compatible with the audio and PTT/COR signals of most radios, using
either the balanced 4-wire or unbalanced direct connection ports of the IP Gateway.
If a radio’s serial data is to be passed through the IP Gateway, the radio either needs to
use RS-232 or TTL serial data, or external third-party devices will be needed to convert
the radio’s electrical interface to RS-232 or TTL. The IP Gateway’s serial data signals
only include transmit and receive data – additional handshake lines such as RTS/CTS and
DSR/DTR are not supported. Radios that require these signals will not work with the IP
Gateway.
Note Serial data protocols used by many devices such as mobile
radios may have stringent timing requirements. Operation over
IP networks can introduce delays which may prohibit the proper
operation of certain serial data protocols.
Network Compatibility
Several network parameters such as the type of switches, overall network speed, and
prioritization settings have a direct, measurable effect on a system using Model 6300 IP
Gateways. The following list identifies specific requirements.
Caution! Installations for critical use should only use a reliable,
quality network that meets or exceeds all of the network
requirements.
•Model 6300 IP Payload: 1 Kbps idle, 130 Kbps active (G.711 per radio, per
direction)
12 025-9631D.1

Licensed Features
•Payload to Bandwidth Ratio: < 40% (< 30% mission critical). Bandwidth of IP
bearer should be 2 to 3 times the actual payload to ensure optimum voice quality.
•Packet Loss: < 5% (< 0.1% mission critical)
•Packet Delay: < 500 ms (< 40 ms mission critical)
•Packet Jitter: < 100 ms (< 20 ms mission critical)
•Network: Fully switched Ethernet, full-duplex, capable of passing unicast UDP.
Sharing the network with other IP traffic may negatively impact voice quality
and therefore should not be considered for mission critical applications.
Licensed Features
The Model 6300 requires a license to enable the BSI Protocol (US Department of
Homeland Security Bridging System Interface). The BSI Protocol can each be
licensed separately for one or both links.
Safety
Important Safety Information
The installation, maintenance, and/or operation of this equipment may present potentially
unsafe conditions, including, but not limited to, electrical shock, improper voltage to
components, and improper operation that can cause personal injury, death, or damage to
property.
Read Instructions
Read all the safety instructions before operating the equipment. Retain these safety
instructions for future reference. Specialized procedures and instructions are required and
must be followed. Also, all applicable safety procedures, such as Occupational, Safety,
and Health Administration (OSHA) requirements, National Electric Code Requirements,
local code requirements, safe working practices, and good judgment must be used by
personnel.
13

Introduction
Heed Warnings
Adhere to all warnings on the equipment and in the operating instructions. Follow all
operating and use instructions.
Mounting
Mount the equipment only as recommended by the manufacturer (see Mounting on page
17). Situate the equipment away from heat sources such as radiators, heat registers,
stoves, and other devices (including amplifiers) that produce heat.
Power Sources and Grounding
Connect the equipment to the type of power source described in the installation
instructions or as marked on the equipment. Take precautions to avoid defeating the
grounding or polarization provisions of the equipment. Disconnect the power to the
equipment by a circuit breaker when left unused for long periods of time.
14 025-9631D.1

Safety
15

Physical Installation
Physical Installation
Overview
This chapter covers installation of the IP Gateways, including initial configuration.
Required Tools
The following tools may be required during installation.
•Screwdriver set
•Wire crimping tool
•RJ11/RJ45 crimping tool
16 025-9631D.1

Mounting
Mounting
The IP Gateway is designed to be either a free-standing device or, with a special top
cover, a rack-mount device. A free-standing IP Gateway has no mount points. An IP
Gateway with a top cover meant for rack mounting has two ears with a total of four holes.
In the rack-mount configuration, there are one or two IP Gateways per mounting plate.
The following diagram shows two IP Gateways in a dual unit rack mount plate (P/N 950-
0588). A single unit rack mount plate is also available (P/N 950-0589).
Network Power
Model 6300 IP Gateway
Status IP Radio
TX
RX
Link 1
Status
TX
RX
Link 2
IP Radio
Network Power
Model 6300 IP Gateway
Status IP Radio
TX
RX
Link 1
Status
TX
RX
Link 2
IP Radio
Zetron iRIMs, VoIP Radio Gateways, and IP Gateways all have similar external cases
and all use the same rack mount plates. A dual unit rack mount plate may save rack space
and/or provide a more intuitive hardware layout.
♦To mount the IP Gateway in a rack-mount configuration
1. Read Physical Dimensions on page 9.
2. Hold the rack mount in the proper top/bottom orientation. On a dual unit plate,
the long edge with two rounded corners is the top. On a single unit plate, the side
with the stripe is the top.
3. Slip the IP Gateway “ears” over the threaded studs on the back of the rack mount
plate.
4. Secure the unit with the four provided 4-40 nuts. Repeat for additional units.
5. Install the mount plate and attached units by driving the four provided screws
through the mounting plate into the rack. This is best done with two people: one
to support the weight and position of the hardware and the other to drive the
screws.
17

Physical Installation
DIP Switches
Each IP Gateway has four DIP switches at the rear that must be configured before power
is applied. The following table describes the purpose of each of the DIP switches for
troubleshooting and reference purposes. For most purposes, the switches can be left in
their default positions.
Table 1 - IP Gateway DIP switch settings
Switch Position Description
Up (Default) The IP Gateway uses the IP parameters and password that the unit is
configured with.
A
Down The IP Gateway uses hard-coded IP parameters and password, and they are
determined by switch B. Use this position if you have forgotten the password
and need to reset it.
Up (Default) IP address = 192.168.0.1
Netmask = 255.255.255.0
Gateway = 192.168.0.100
Password = 8206363
B
Down IP address = 192.168.0.133
Netmask = 255.255.255.0
Gateway = 192.168.0.100
Password = 8206363
Up (Default) Disables option uploads and restore factory defaults feature.C
Down Enables option uploads and restore factory defaults feature.
Up Perform a full memory test at power-up. The front panel LEDs will remain lit
for the duration of the test (approximately 15 seconds). If there is no error, the
IP Gateway will boot up. If there is an error, the LEDs will flash for 10
seconds and the IP Gateway will attempt to boot up.
D
Down (Default) Skip memory test and attempt to boot up normally when power is applied.
Note The normal operating position for the four switches are UP, UP,
UP, DOWN.
18 025-9631D.1

Jumpers
Jumpers
Table 2 – Model 6300 jumper settings
Jumper Position Purpose
JP3
JP4
A: Normal*
B: Non-inverted
These jumpers must be moved together to set the signal to inverted
or non-inverted for Link A.
JP5 Installed: Enable flashing
Removed: Write-protect*
Install the jumper during the procedure to add licenses. Otherwise,
the jumper should be removed.
JP6
JP7
A: Normal*
B: Non-inverted
These jumpers must be moved together to set the signal to inverted
or non-inverted for Link B.
JP8 Installed* Factory use only. Leave in the default position.
JP12
JP13
A: TTL levels*
B: RS232 levels
These jumpers must be moved together to set the levels for Link B.
JP16 Installed* Factory use only. Leave in the default position.
JP20
JP21
A: TTL levels*
B: RS232 levels
These jumpers must be moved together to set the levels for Link A.
JP24 A: Normal*
B: Failsafe
Toggles normal operation and failsafe operation. Failsafe operation
is only needed if the product’s firmware becomes corrupted. For
normal operation, leave the jumper in the default position A.
* = Default position
Figure 4 – Model 6300 jumper locations
19

Physical Installation
Connections
+13.5VDC/GND A B C D Tone Remote NetworkRadio A Radio B+13.5VDC/GND
A B C D
Balanced Audio Network Link 2Link 1 Pin 1
Power Port
Power should be applied only after jumpers and switches are set, and after the other
cables have been connected. Power should be removed if changing jumper or switch
settings.
The IP Gateway can be powered by your own power supply or by a Zetron-supplied
power supply. The IP Gateway accepts from +10.5 to +16 VDC with a minimum 500mA
rating. See Figure 3 on page 10 for the polarity.
•To use your own power supply, a green screw terminal and cable are provided to
plug into the IP Gateway. Wire this connector/cable to your power supply.
•To power the IP Gateway from the Zetron supplied power supply (P/N
950-0923), simply plug it into the IP Gateway.
Balanced Audio Port
In order to provide for several connection scenarios, three cables are provided for this
port. Cable 709-7845 carries both Link A and Link B audio. Cables 709-7944 and
709-7945 carry one link each, using splitter 709-0153 to connect to the port.
Table 3 – Balanced Audio Port pinout
Signal
Balanced
Audio
Port Pin #
Cable
709-7845
Wire Colors
Cable
709-7944
Wire Colors
Cable
709-7945
Wire Colors
Link B TX+ Output 1 Grey N/C White/Orange
Link B TX– Output 2 Brown N/C Orange
Link A TX+ Output 3 Yellow White/Orange N/C
Link A RX+ Input 4 Green White/Blue N/C
Link A RX– Input 5 Red Blue N/C
Link A TX– Output 6 Black Orange N/C
Link B RX+ Input 7 Orange N/C White/Blue
Link B RX– Input 8 Blue N/C Blue
20 025-9631D.1