RFL EXMUX 3500 User manual

RFL™ EXMUX®3500/3500M
RFL™ EXMUX®3501/3501M
IP Access Multiplexer
Instruction Manual
“Hubbell Power Systems, Inc. © This document is the property of Hubbell Power Systems, Inc. and may
not be reproduced, transmitted, published or stored in an electronic retrieval system, in whole or in
part, by any means, electronic or otherwise. For permission contact:
[e-mail].”
Hubbell Power Systems, Inc. –RFLTM Products
353 Powerville Road ● Boonton Twp., NJ 07005-9151 USA
Tel: [phone] ● Fax: [phone]
Email: Customer.Serv[email protected] ● www.rflelect.com
Publication Number MC3500M
Version 32, June 2018

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EXMUX 3500/3501 Hubbell Power Systems, Inc. –RFLTM Products
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NOTICE
The information in this publication is proprietary and confidential to Hubbell Power
Systems, Inc., RFL™ brand products. No part of this publication may be reproduced or
transmitted, in any form or by any means (electronic, mechanical, photocopy,
recording, or otherwise), or stored in any retrieval system of any nature, unless written
permission is given by Hubbell Power Systems, Inc., RFL™ brand products.
This publication has been compiled and checked for accuracy. The information in this
publication does not constitute a warranty of performance. Hubbell Power Systems,
Inc., RFL™ brand products reserves the right to revise this publication and make
changes to its contents from time to time. We assume no liability for losses incurred as
a result of out-of-date or incorrect information contained in this publication.
WARRANTY
The RFL™ eXmux®comes with a three year warranty from date of shipment for replacement of any part, which
fails during normal operation. RFL will repair or, at its option, replace components that prove to be defective at no
cost to the Customer. All equipment returned to RFL must have an RMA (Return Material Authorization) number,
obtained by calling the RFL Customer Service Department. A defective part should be returned to the factory,
shipping charges prepaid, for repair or replacement FOB Boonton, N.J.
Hubbell Power Systems, Inc. –RFLTM Products is not responsible for warranty of peripherals, such as printers and
external computers. The warranty for such devices is as stated by the original equipment manufacturer. If you have
purchased peripheral equipment not manufactured by Hubbell Power Systems, Inc. –RFLTM Products, follow the
written instructions supplied with that equipment for warranty information and how to obtain service.
WARRANTY STATEMENT
The RFL™eXmux®is warranted against defects in material and workmanship for three year from the date of
shipment. During the warranty period, RFL will repair or, at its option, replace components that prove to be
defective at no cost to the customer, except the one-way shipping cost of the failed assembly to the RFL Customer
Service facility in Boonton, New Jersey. Hubbell Power Systems, Inc. –RFLTM Products warrants product repair
from three years from the date of repair or the balance of the original factory warranty, whichever is longer.
This warranty does not apply if the equipment has been damaged by accident, neglect, misuse, or causes other than
performed or authorized by Hubbell Power Systems, Inc. –RFLTM Products
This warranty specifically excludes damage incurred in shipment to or from Hubbell Power Systems, Inc. –RFLTM
Products. In the event an item is received in damaged condition, the carrier should be notified immediately. All
claims for such damage should be filed with the carrier.
NOTE
If you do not intend to use the product immediately, it is recommended that it be opened immediately after
receiving and inspected for proper operation and signs of impact damage.
This warranty is in lieu of all other warranties, whether expressed, implied or statutory, including but not limited to
implied warranties of merchantability and fitness for a particular purpose. In no event shall RFL be liable, whether
in contract, in tort, or on any other basis, for any damages sustained by the customer or any other person arising
from or related to loss of use, failure or interruption in the operation of any products, or delay in maintenance or
for incidental, consequential, indirect, or special damages or liabilities, or for loss of revenue, loss of business, or

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other financial loss arising out of or in connection with the sale, lease, maintenance, use, performance, failure, or
interruption of the products.
USING THIS MANUAL
The following Instruction manual is for the use of maintenance and operating personnel responsible for
communications in the electric utility or other facility utilizing the eXmux. All local safety rules in force at the
facility where the eXmux is installed must be strictly enforced. Only properly trained personnel may install or
work on the eXmux.
The instruction manual is divided into the following sections:
1. Introduction - overview of product.
Introduces the user to the product, gives an overview of the various functions of the eXmux.
2. Safety instructions.
Important safety information and warnings.
3. System description.
Describes the various interfaces on the unit (high and low speed connections). Explains the function of
the LED’s and auxiliary ports.
4. Installation.
Unpacking and physical installation of the unit. Connecting power and data lines but not configuring the
unit.
5. Module Replacement (3500M/3501M Only).
Instructions for removing and inserting Interface Units, Ethernet Switch and power supplies in the eXmux
3500M/3501M modular (hot swap) eXmux.
6. System user interface.
Describes the Visual Network Management Software used to configure the eXmux. Installing the
software and connecting a computer to the eXmux.
7. Configuration.
Interrogating and/or configuring the network using VNMS.
8. Configuration and Status Settings for the eXmux Managed Ethernet Switch
Describes how to configure the Ethernet Switch.
9. Start-up (Commissioning).
System check-out and functional testing. Includes instructions on using the eXmux System Software
Upgrade Utility.
10. Basic troubleshooting.
An inter-active troubleshooting guide.
11. Troubleshooting a TDM Circuit
Tools to help determine the root cause of a TDM circuit network connectivity failure.
12. Technical Data
The technical specifications for the eXmux.
13. Glossary and index.
14. Application Notes.
Contains additional information, usually customer specific, intended to assist the user in configuring and
operating the eXmux.

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OPERATING PERSONNEL
Operating and service personnel must:
Be trained in safety procedures required when working with equipment generating high voltages.
Have a general knowledge of electronic and electrical systems.
Have practical training on communications equipment.
Be comfortable working with a PC/notebook computer in a Windows®operating system.
Take ESD precautions when working on or around the eXmux.
Have read and understood this manual.
Trademark information:
“Windows” and “Vista” are registered trademarks of Microsoft Corporation.
“Ethernet” is a registered trademark of Xerox Corporation.
“eXmux” is a registered trademark of Hubbell Power Systems, Inc.
“Actel” is a registered trademark of Actel Corporation.
“RFL” is a trademark of Hubbell Power Systems.
The trademark information listed above is, to the best of our knowledge, accurate and complete.
Applicable standards and certifications:
European Directives US Emissions

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Table of Contents
Section 1. Introduction - Overview of Product....................................................................................1-1
1.1 Introduction.....................................................................................................................................1-1
1.2 Major Components.........................................................................................................................1-2
Section 2. Safety Instructions...............................................................................................................2-1
2.1 Warnings and Safety Summary......................................................................................................2-1
Section 3. System Description .............................................................................................................3-1
3.1 Features and Typical Applications (3500/3501).............................................................................3-1
3.2 Modular RFL™ eXmux® Features (3500M/3501M) ......................................................................3-2
3.3 Firewall Information........................................................................................................................3-2
3.4 Typical Network Application ...........................................................................................................3-3
3.5 LED Indicators (Front and Rear) ....................................................................................................3-7
3.6 Customer Interface Units (IU’s) - Layout 3500/3501 Non-Modular..............................................3-11
3.7 Customer Interface Units (IU’s) - Layout 3500M/3501M Modular Unit ........................................3-12
3.8 Customer Interface Units –Detailed Descriptions .......................................................................3-14
3.9 The RFL™ eXmux® TPS System ................................................................................................3-35
3.10 Integrated Ethernet Switch.........................................................................................................3-41
3.11 Power Supplies (3500/3501/3500M/3501M)..............................................................................3-45
3.12 Service Telephone......................................................................................................................3-46
3.13 User Access USB Port ...............................................................................................................3-46
3.14 T1/E1 Built in Port.......................................................................................................................3-47
3.15 Additional Network schemes......................................................................................................3-49
3.16 Typical DS0 Grooming Application.............................................................................................3-50
Section 4. Installation............................................................................................................................4-1
4.1 Introduction.....................................................................................................................................4-1
4.2 Unpacking.......................................................................................................................................4-1
4.3 Mounting the Equipment ................................................................................................................4-1
4.4 Ventilation.......................................................................................................................................4-4
4.5 Interface Connections (Pin-Outs)...................................................................................................4-5
4.6 RFL™ eXmux® TPS System Installation .....................................................................................4-10
4.7 Data and Power Connections.......................................................................................................4-14
Section 5. Module Replacement (3500M/3501M Only) ......................................................................5-1
5.1 Overview of Module Replacement .................................................................................................5-1
5.2 Interface Unit Removal and Replacement .....................................................................................5-2
5.3 Ethernet Switch Replacement........................................................................................................5-6
5.4 Power supply Replacement............................................................................................................5-9
Section 6. System User Interface .........................................................................................................6-1
6.1 Overview.........................................................................................................................................6-1
6.2 MAC Address Information ..............................................................................................................6-2
6.3 Installing the EXMUX 3500 VNMS.................................................................................................6-2
6.4 Accessing the RFL™ eXmux® through the USB Ports .................................................................6-6
6.5 Installing and Running the USB User Access Utility ......................................................................6-7
6.6 System Recovery/Debug Port......................................................................................................6-21

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Section 7. Configuration .......................................................................................................................7-1
7.1 Introduction to Opening an Existing or Configuring a New Network..............................................7-1
7.2 Getting Started ...............................................................................................................................7-1
7.3 Viewing a Network........................................................................................................................7-19
7.4 System Configuration...................................................................................................................7-21
7.5 VNMS System and User Preferences..........................................................................................7-43
7.6 Configuring the Customer Interfaces (IU’s) ..................................................................................7-44
7.7 Data Interface Configurations.......................................................................................................7-50
7.8 Serial Server Interface Unit Configuration....................................................................................7-64
7.9 TPS System Configuration...........................................................................................................7-87
7.10 Telephone and Audio Interface Unit Configuration....................................................................7-98
7.11 Ethernet Switch Configuration..................................................................................................7-105
7.12 Interface Mapping.....................................................................................................................7-105
7.13 Hitless Switching ......................................................................................................................7-121
7.14 Service Telephone Configuration.............................................................................................7-127
7.15 System Global Settings............................................................................................................7-128
7.16 Retrieving and Sending Reports ..............................................................................................7-132
Section 8. Configuration and Status Settings for the HPS/RFL™ eXmux® unit Managed Ethernet
Switch......................................................................................................................................................8-1
8.1 Integrated Ethernet Switch Redundancy Protocol .........................................................................8-1
8.2 Ethernet Network Message Types.................................................................................................8-2
8.3 Ethernet Switch Configuration –Model 3500/3500M.....................................................................8-3
8.4 Ethernet Switch Configuration –Model 3501/3501M...................................................................8-44
8.5 3500/3501 Interoperability............................................................................................................8-85
Section 9. Start-Up (Commissioning) ..................................................................................................9-1
9.1 Initial Start-Up.................................................................................................................................9-1
9.2 Path Redundancy.........................................................................................................................9-19
9.3 RFL™ eXmux® Static Route Builder ...........................................................................................9-20
9.4 RFL™ eXmux® Static Route Tool................................................................................................9-21
9.5 Unicast TDM Timing and Neighbor Discovery Set-Up.................................................................9-24
9.6 Unicast Neighbor Discovery.........................................................................................................9-32
9.7 Provisioning for TDM Timing........................................................................................................9-35
9.8 TDM VLAN Tagging .....................................................................................................................9-40
9.9 Using the RFL System Software Upgrade Utility .........................................................................9-46
9.10 Decommissioning.......................................................................................................................9-59
Section 10. Troubleshooting Guide ...................................................................................................10-1
10.1 Introduction.................................................................................................................................10-1
10.2 Troubleshooting Main Menu.......................................................................................................10-1
10.3 FE/GE (LAN/WAN) Connections Issues ....................................................................................10-2
10.4 Interface Units Issues.................................................................................................................10-9
10.5 Service Channel Issues............................................................................................................10-17
10.6 Alarm Issues.............................................................................................................................10-18
10.7 Network Management Software Issues ...................................................................................10-25
Section 11. Trouble Shooting a TDM Circuit Outage .......................................................................11-1
11.1 TDM Bundle Status ....................................................................................................................11-2
11.2 TDM Timing and Neighbor Discovery Table ..............................................................................11-7
11.3 Sequence of Events .................................................................................................................11-12

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11.4 Ethernet Port Mirroring.............................................................................................................11-12
11.5 Putty .........................................................................................................................................11-14
11.6 Diagnostics...............................................................................................................................11-20
Section 12. Technical Data..................................................................................................................12-1
12.1 Electrical Specifications..............................................................................................................12-1
12.2 Environmental and Safety Compliances ....................................................................................12-9
Section 13. Glossary and Index..........................................................................................................13-1
13.1 Glossary .....................................................................................................................................13-1
13.2 Index...........................................................................................................................................13-5
Section 14. Application Notes ............................................................................................................14-1
FCC STATEMENT
Federal Communications Commission
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 and, if not installed and used in accordance with the Instruction Manual, may cause harmful interference
to radio communication. 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.

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List of Effective Pages
When revisions are made to the RFL™ eXmux® Instruction Manual, the entire section where
revisions were made is replaced. For this addition of the Instruction Manual dated October
2017 the sections are dated as follows.
Section
Date
Front Section, TOC etc.
October 2017
Section 1.
October 2017
Section 2.
October 2017
Section 3.
October 2017
Section 4.
October 2017
Section 5.
October 2017
Section 6.
October 2017
Section 7.
June 2018
Section 8.
June 2018
Section 9.
June 2018
Section 10.
October 2017
Section 11.
June 2018
Section 12.
June 2018
Section 13
October 2017

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Revision Record
Rev. Date on
Manual
Description of Changes
Actual Date
Released
6-22-09
At Beta
6-22-09
12-1-09
First release of Instruction Manual.
VNMS software at 1.0.0.
12-7-09
6-1-10
T1/E1 and RS-485 Customer IU’s added. System
Configuration added (6.4). DS0 Grooming added.
Inter-active Trouble Shooting Guide added, (9.1)
Hitless Switching set-up added. New section 7
(Ethernet Switch Configuration) added, remaining
sections moved up one. VNMS software at 2.0.0
6-15-10
6-29-10
Trademark information revised.
6-30-10
11-20-10
Updates to Section 3, 5, 6, 8 and 11.
VNMS software at 2.5.0. Note: Manual embedded with
VNMS software with this and all subsequent revisions.
12-6-10
2-1-11
Addition of Serial Server information (VNMS at 3.0.0)
No ECO release.
3-1-11
3-7-11
Addition of new 2-Wire Audio IU (VNMS at 3.1)
Ordering Information added. Minor updates throughout
manual.
3-30-11
6-6-11
Changes to section 6.
6-10-11
10-19-11
Section 2, 4, 5, 9 and 11 updated (VNMS at 3.2)
10-19-11
2-27-12
DNP3 support added to the serial Server.
3-1-12
8-21-12
Addition of the RFL™ eXmux® TPS System to the
Instruction Manual. New pages added in section 3, 4
and 6. General revision throughout manual.
(VNMS at 3.5)
10-1-12
2-15-13
Inclusion of RFL™ eXmux® 3500M, Modular unit to the
Instruction Manual. New section 5 added, remaining
sections moved up.
(VNMS at 4.0)
4-8-13
2-10-14
Inclusion of changes to manual for 4.1 VNMS release.
Section 6, 7, 8 revised.
3-1-14
3-20-14
Inclusion of RFL™ eXmux® SNMP Trap/SOE list in
Section 7.
Minor updates in Section 5 and 8.
3-20-14

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5-13-14
Minor updates to Section 3, 5, 7, 10 and 11.
5-13-14
7-29-14
Addition of singlemode C37.94 fiber interface in section
3, and 7.
7-29-14
12-8-14
Section 7 updated. FPP and CAS added to Bundle
Settings and Status. (VNMS at 4.2)
12-8-14
3-24-15
Section 3, 6, 7 and 9 updated. Extensive changes to
section 7.4 Unicast added. (VNMS at 5.0)
3-24-15
12-1-15
Section 8 updated to include new Ethernet switch.
Additional changes to section 3 and 7. (VNMS at 6.0)
Manual changed to reflect model number changes
which are:3500/3500M Original Ethernet Switch.
3501/3501M New Ethernet Switch.
12-1-15
5-20-16
Inclusion of changes to manual for 6.1 VNMS release.
Section 7, 8, 9 and 10 revised.
5-20-16
10-16-17
Inclusion of user interface changes for VNMS in
sections 5, 7, 8, 9, 10, 11
Updates to sections 7.4.2 Bundle Timing, 7.12.4 DSO
Grooming and 7.13 Hitless Switching,
10-16-17
2018-06
Update Manual for Redundant Path Option, Gateway
MAC Address

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Ordering Information, Decoding the Part Number
Serial and part number information is located on the right mounting bracket (ear) of the RFL™
eXmux® unit as shown below. The part number and site name (if provided by the customer) is
also located on the other mounting bracket.
SO 173377
PO 0963144
PN EXM224GGA1C1DEF
SN 09240032
Sales order number Purchase order number
Part number see the
following page for
configurator
Serial number
3500/3501M
3500M/3501M
SO 173388
PO 0963155
PN EXH224GGA1C1DEF
SN 09240042
Sales order number Purchase order number
Part number see the
following page for
configurator
Serial number
Note: Throughout the Instruction Manual the Modular eXmux unit is
referred to as the 3500M. However, when ordering the prefix 'M' is used
for the Non-Modular Unit and the prefix 'H' is used for the Modular Unit.
The following pages list the possible ordering options.

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June 2018 973.334.3100
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3501/3501M
D D D
CM MP RP FE G5 G6 S3 S4 S1 S2 S5 S6
Non-Modular N
Modular Hot-Pluggable M
24 VDC w/Terminal Block 1
38-150VDC / 110VAC w/Terminal Block 2
200-300VDC w/Terminal Block 3
24 VDC w/Compression Block 4
38-150VDC / 110VAC w/Compression Block 5
200-300VDC w/Compression Block 6
220VAC w/Terminal Block 7
220VAC w/Compression Block 8
REDUNDANT POWER SUPPLY OPTION
None 0
24 VDC 1
38-150VDC / 110VAC 2
200-300VDC 3
220VAC 4
ETHERNET SWITCH WITH FE PORTS (1 -4)
4-RJ-45 10/100 Base TX A
ETHERNET SWITCH GE PORT 5 & Port 6 Option
Electrical RJ-45 10/100/1000 Base TX A
One[1] SFP - 1000Base-SX 850nm 550m/1800ft MM LC Connector B
One[1] SFP - 1000Base-LX 1310nm 10km/6.2mi SM LC Connector C
One[1] SFP - 1000Base-LX 1310nm 20km/12.4mi SM LC Connector D
One[1] SFP - 1000Base-FX 1550nm 60km/37.3mi SM LC Connector E
One[1] SFP - 1000Base-ZX 1550nm 80km/49.7mi SM LC Connector F
One[1] SFP - 1000Base-ZX 1550nm 120km/74.5mi SM LC Connector G
DS0 INTERFACE UNIT (IU) OPTIONS
SLOT 1 - 7 DOUBLE AND SINGLE POSITIONS SLOT(S)
4-Port Multi-Protocol Sync IU (RS-422/530, X.35, X.21) D A 1
4-Port G.703 Sync. IU DB 1
8-Port Async. RS-232 IU DC 1
4-Port C37.94 Sync. IU SDD
8-Port 4-Wire Audio E&M IU S EE
8-Port 2-Wire FXO IU S FF
4-Port 2-Wire FXS IU S GG
4-Port RS-485 IU SJ
1-Port T1/E1 IU SK
4-Port RS-232/485 Serial Server IU S L
4-Port 2-Wire Audio E&M IU S M
2-Port TPS IU with One[1] SS I/O Box S N Terminal T Compression N or T
2-Port TPS IU with One[1] RLY I/O Box S P Terminal U Compression P or U
2-Port TPS IU with Two[2] SS I/O Box S Q Terminal V Compression Q or V
2-Port TPS IU two Two[2] RLY I/O Box S R Terminal W Compression R or W
2-Port TPS IU with One[1] SS I/O Box and One[1] RLY I/O Box S S Terminal X Compression S or X
None S HZ
CM = Chassis & Motherboard Style
MP = Main Power
RP = Redundant Power
FE = Fast Ethernet Ports
GX = GigE Port X (where x= 5 or 6)
SX = Slot X (where X=1-7)
D = Can fit double slot moodule(3501 Only: Double slot IUs can only start in S1, S3 or S5)
Note 1: If A, B or C is selected for S1, S2, must be 1
If A, B or C is selected for S3, S4, must be 1
If A, B or C is selected for S5, S6, must be 1
Note 2: Only a maximum of two[2] FXS IU is allowed per chassis
Note 3: The T1/E1 IU can not be place in S7
EX3501
(See note 2 below)
(See note 1 below)
(See note 1 below)
(See note 3 below)
S7
(See note 1 below)
RFL EXMUX 3501/3501M - IP Access Multiplexer
Ordering Information
RFL Smart Number Description (fill in blanks):
CHASSIS & MOTHER BOARD STYLE
MAIN POWER SUPPLY

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June 2018 973.334.3100
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Section 1. Introduction - Overview of Product
1.1 Introduction
The RFL™ eXmux® is a next generation substation hardened IP Access Multiplexer
engineered to seamlessly transport Voice, serial and Ethernet Data communications over
Ethernet networks; providing the flexibility of backward compatibility with legacy devices and
forward compatibility with Ethernet devices on the same communications platform. The
RFL™ eXmux® uses the latest TDM over IP technology and an integrated Layer 2 Managed
Switch, which allows the unit to support legacy interfaces such as T1/E1, RS-232, RS-530/422,
V.35, X.21, G.703, C37.94, and various voice interfaces, along with native IP solutions. A two
wire telephone service channel is incorporated into the RFL™ eXmux® to provide in-band
voice communication to any RFL™ eXmux® connected to the network. The 3500/3501 model
is a 3U high economical unit; whereas the 3500M/3501M is a 5U high unit that offers hot-swap
capabilities for all functional Interface Units for use in mission-critical applications.
The RFL™ eXmux® can support any network topology such as linear, star, rings and mesh
setups. Designed into the RFL™ eXmux®, is a distinctive “Hitless Switching” mechanism that
allows the device to recover from a path failure without losing a single data bit. The simplified
diagram below shows the basic data flow within the unit.
Ethernet
Ethernet
Layer 2 Managed
Ethernet Switch
MUX
E1
E1
7 Interface Units
(IU's) for Sync,
Async, T1/E1,C37.94
or Telephone/Audio.
(Some Modules may
use 2 Slots, Slot 7 is
always single)
1
4
56
Local Port, T1/E1
Electrical or Fiber
GigE WAN Ports
(Ethernet)
Customized
Interface
Units
Electrical
or Fiber
LAN Ports
(Ethernet)
Main Board
Ethernet
4 Port Packet Trunk
TDM over IP
Converter - 1
User Access USB Port
Service Telephone
4 Port Packet Trunk
TDM over IP
Converter - 2
Management
Serial Server Interface Units
9
8
10
7
Figure 1-1. Simplified Data Flow
The RFL™ eXmux® is hardware configured at the factory and there should be no need
for the customer to access the inside of the unit, there are no configuration or dip
switches to set.
Because Hubbell Power Systems, Inc. has a policy of continuous product improvement, we
reserve the right to change designs and specifications without notice and as such this policy
applies to the entire document, even when not specifically referenced.

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June 2018 973.334.3100
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Windows®operating system based Visual Network Management Software (VNMS)
allows the user to communicate with the unit and setup configurations. The software is
provided on a CD or can be downloaded from the RFL website.
1.2 Major Components
The illustrations below show both the non-modular 3500 and the modular 3500M RFL™
eXmux® units. The main components are shown with a brief description of their function.
Internal components are described to give the operating engineer a brief understanding of
how the RFL™ eXmux® functions. The 3500M has a modular design featuring “Hot
Swap” capability for easy Interface Unit replacement without taking down the node.
3500/3501
Rear View
Front View
4
3
6
7910
787
3500M/3501M
Front View Rear View
6
4
10 511
7
79
3
87

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1. Mainboard (not shown)
The Mainboard contains control and configuration facilities for the whole chassis. It
also contains two TDM over IP converters which have the capability to convert eight
T1/E1 streams into two Ethernet lines. The Main Board contains a Power PC that
functions as the system CPU and will interface with the TDM over IP converters via the
system bus. The Power PC also communicates with built-in customer specific interfaces
via memory mapped registers resident on an Actel FPGA. The Actel provides hardware
management including interfacing for a local service phone.
2. Motherboard (3500M/3501M only, not shown)
The RFL™ eXmux® 3500M/3501M has a removable motherboard/mainboard assembly
that is accessed from the front of the unit. The motherboard functions as a mid-plane
between the Interface units and the mainboard providing “hot swap” control and
buffering.
3. Customer Interface Units
The RFL™ eXmux® is factory configured to meet each customer’s unique
communication needs. There are up to eleven interface units available. Each of these
interface units (with the exception of the Serial server) will convert external low speed
traffic into an E1 stream that connects to the main board. The current list of supported
external interfaces is:
Asynchronous Data (RS-232) (See Section 3.8.1.5)
Asynchronous Serial Server (Remote Substation IED monitoring with DNP3
support) (See Section 3.8.2)
RS-485 Asynchronous Data (2 or 4 wire operation) (See Section 3.8.1.6)
Synchronous Data (Multi-Protocol, RS-449/RS-530, V.35, X.21)
(See Section 3.8.1.1)
T1/E1 (See Section 3.8.1.2)
C37.94 Optical (See Section 3.8.1.4)
G.703 (See Section 3.8.1.3)
2 and 4W Audio (See Section 3.8.4)
2W Telephone FXO (See Section 3.8.3.1)
2W Telephone FXS (See Section 3.8.3.2)
TPS System, with separate I/O Module (See Section 3.9)
4. Integrated Ethernet Switch.
The Managed Ethernet Switch connects to the following devices:
2 Internal Ethernet Ports for the TDM over IP converters located on the Main
Board.

Introduction - Overview of Product
EXMUX 3500/3501 Hubbell Power Systems, Inc. –RFLTM Products
June 2018 973.334.3100
1-4
1 dedicated internal Ethernet link for Serial Server Module.
1 dedicated internal Ethernet link for the Power PC.
2 External GigE (WAN) Ethernet SFP/RJ-45 ports.
4 External 10/100 Base-TX or 100 Base-FX (LAN) optical Ethernet ports.
(See Section 3.10).
5. Power Supplies (shown on the 3500M/3501M only)
The Power supply(ies) convert input power from a station battery or other power source
into an isolated low voltage supply used by the RFL™ eXmux® circuitry.
(See Section 3.11)
6. External Power Connections.
All customer connections to the RFL™ eXmux® are made through the rear of the unit.
External power source(s) and major and minor relay alarm contacts are also connected
here.(See Sections 4.7.2 through 4.7.6).
7. LED Indicators (Front and Rear).
The status of the unit is constantly monitored; LED indicators from either the front or
rear of the unit will display various conditions and alarm states.
(See Section 3.5 for details of the front and rear LED indicators)
8. Front USB Port and Service Telephone.
These ports provide customer access through a Universal Serial Bus Port for connection
to a laptop or PC for entry of basic access information (passwords, IP addresses etc.)
and Service Telephone.
(See Section 3.12 and 3.13).
9. Rear USB Port, Service Telephone and T1/E1 Connection
As above, but with the addition of an external built in T1/E1 connection.
(See Section 3.12, 3.13 and 3.14).
10. Power supply(ies) ON/OFF switch
See Section 4.7.3 and 4.7.4
11. External Fuse (3500M/3501M only)
See Section 5.4.2

Safety Instructions
EXMUX 3500/3501 Hubbell Power Systems, Inc. –RFL® Products
June 2018 (c)2018 Hubbell Incorporated
2-1
Section 2. Safety Instructions
2.1 Warnings and Safety Summary
3500/3501
!
CAUTION
TO PREVENT ELECTRICAL SHOCK
PROPER CAUTION MUST BE EXERCISED WHEN SERVICING THIS EQUIPMENT
ALL TERMINALS ON THE REAR OF THIS UNIT MAY HAVE HIGH VOLTAGE
!
This device complies with Part 15 of the FCC
rules and regulations. Operation is subject to the
following two conditions: (1) This device may not
cause harmful interference, and (2) this device
must accept any interference including
interference that may cause undesired operation.
Dangerous Voltages symbols
silk screened onto surface
CAUTION
!
FOR YOUR SAFETY
THE INSTALLATION, OPERATION AND
MAINTENANCE OF THIS EQUIPMENT
SHOULD BE PERFORMED BY
QUALIFIED PERSONS ONLY.
Figure 2-1. External Labels, Warnings and Cautions (3500/3501)
Because Hubbell Power Systems, Inc. has a policy of continuous product improvement, we
reserve the right to change designs and specifications without notice and as such this policy
applies to the entire document, even when not specifically referenced.

Safety Instructions
EXMUX 3500/3501 Hubbell Power Systems, Inc. –RFL® Products
June 2018 (c)2018 Hubbell Incorporated
2-2
3500M/3501M
!
CAUTION
TO PREVENT ELECTRICAL SHOCK
PROPER CAUTION MUST BE EXERCISED WHEN SERVICING THIS EQUIPMENT
ALL TERMINALS ON THE REAR OF THIS UNIT MAY HAVE HIGH VOLTAGE
!
This device complies with Part 15 of the FCC
rules and regulations. Operation is subject to the
following two conditions: (1) This device may not
cause harmful interference, and (2) this device
must accept any interference including
interference that may cause undesired operation.
Dangerous Voltages symbols
silk screened onto surface
CAUTION
!
FOR YOUR SAFETY
THE INSTALLATION, OPERATION AND
MAINTENANCE OF THIS EQUIPMENT
SHOULD BE PERFORMED BY
QUALIFIED PERSONS ONLY.
Figure 2-2. External Labels, Warnings and Cautions (3500M/3501M)
2.1.1 Safety Summary
The following safety precautions must be observed at all times during operation, service, and
repair of this equipment. Failure to comply with these precautions, or with specific warnings
elsewhere in this manual, violates safety standards of design, manufacture, and intended use of
this product. RFL assumes no liability for failure to comply with these requirements.
Ground the Chassis
The chassis must be grounded to reduce shock hazard and allow the equipment to perform
properly. Equipment supplied with three-wire ac power cables must be plugged into an
approved three-contact electric outlet. All other equipment is provided with a rear-panel
protective earth terminal, which must be connected to a proper electrical ground by suitable
cabling. The location of the protective earth terminal on the RFL™ eXmux® is shown below.
Refer to the wiring diagram supplied with the unit for additional information on chassis and/or
cabinet grounding.

Safety Instructions
EXMUX 3500/3501 Hubbell Power Systems, Inc. –RFL® Products
June 2018 (c)2018 Hubbell Incorporated
2-3
3500/3501
Chassis Protective
Earth Terminal
Figure 2-3. Location of Chassis Protective Earth Terminal (3500/3501)
3500M/3501M
Chassis Protective
Earth Terminal
Figure 2-4. Location of Chassis Protective Earth Terminal (3500M/3501M)
Do not Operate in an Explosive Atmosphere or in Wet or Damp Areas
!
Do not operate the product in the presence of flammable gases or fumes, or in any area that is
wet or damp. Operating any electrical equipment under these conditions can result in a definite
safety hazard.
Keep Away from Live Circuits
Operating personnel should never remove covers. Component replacement and internal
adjustments must be done by qualified service personnel. Before attempting any work inside
the product, disconnect it from the power source and discharge the circuit by temporarily
grounding it. This will remove any dangerous voltages that may still be present after power is
removed.
Unrestricted operator access is only permitted to the front of the unit when hazardous voltage is
applied. It is the responsibility of the installer to restrict access to the rear terminal blocks
where hazardous voltage may exist.

Safety Instructions
EXMUX 3500/3501 Hubbell Power Systems, Inc. –RFL® Products
June 2018 (c)2018 Hubbell Incorporated
2-4
Do not Substitute Parts or Modify Equipment
!
Because of the danger of introducing additional hazards, do not install substitute parts or make
unauthorized modifications to the equipment. The product may be returned to RFL for service
and repair, to ensure that all safety features are maintained.
Read the Manual
!
Operators should read this manual before attempting to use the equipment, to learn how to use
the equipment properly and safely. Service personnel must be properly trained and have the
proper tools and equipment before attempting to make adjustments or repairs.
Service personnel must recognize that whenever work is being done on the product, there is a
potential electrical shock hazard and appropriate protection measures must be taken. Electrical
shock can result in serious injury, because it can cause unconsciousness, cardiac arrest, and
brain damage.
Throughout this manual, warnings appear before procedures that are potentially dangerous, and
cautions appear before procedures that may result in equipment damage if not performed
properly. The instructions contained in these warnings and cautions must be followed exactly.
2.1.2 Additional Warnings
WARNING!
The RFL™ eXmux® may use third party SFP Class 1 Laser Modules. These modules may be
purchased through RFL or third parties. The class 1 certification originates with the SFP
manufacturer, not RFL. Read the following safety information and any additional safety
information included with the modules.
Class 1 Laser Products supplied by RFL are not considered dangerous and comply with the
following standards:
US 21 CFR 1040.10 and 1040.11
IEC 60825-1: 2007
Laser light can potentially cause serious eye damage. The lasers used in the RFL™ eXmux®
produce light that is invisible to the naked eye. It should be assumed that the laser is active at
all times and it is imperative that the technician never look into the end of the fiber or the
aperture with the naked eye or with optical instruments.