CTC Union FMUX101 User manual

FMUX101
FMUX1001
Fiber Optical Multiplexer
Standalone / Rack Type
Modular 16 Channel E1/T1, Data,
POTS plus 100M/1G Ethernet
SNMP Manageable

LEGAL
The information in this publication has been carefully checked and is believed to be entirely accurate at the time of
publication. CTC Union Technologies assumes no responsibility, however, for possible errors or omissions, or for any
consequences resulting from the use of the information contained herein. CTC Union Technologies reserves the right
to make changes in its products or product specifications with the intent to improve function or design at any time
and without notice and is not required to update this documentation to reflect such changes.
CTC Union Technologies makes no warranty, representation, or guarantee regarding the suitability of its products for
any particular purpose, nor does CTC Union assume any liability arising out of the application or use of any product
and specifically disclaims any and all liability, including without limitation any consequential or incidental damages.
CTC Union products are not designed, intended, or authorized for use in systems or applications intended to support
or sustain life, or for any other application in which the failure of the product could create a situation where personal
injury or death may occur. Should the Buyer purchase or use a CTC Union product for any such unintended or
unauthorized application, the Buyer shall indemnify and hold CTC Union Technologies and its officers, employees,
subsidiaries, affiliates, and distributors harmless against all claims, costs, damages, expenses, and reasonable attorney
fees arising out of, either directly or indirectly, any claim of personal injury or death that may be associated with such
unintended or unauthorized use, even if such claim alleges that CTC Union Technologies was negligent regarding the
design or manufacture of said product.
TRADEMARKS
Microsoft is a registered trademark of Microsoft Corp.
HyperTerminal™ is a registered trademark of Hilgraeve Inc.
WARNING:
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 in which case the user will be required to correct the interference at his own expense. NOTICE: (1) The
changes or modifications not expressively approved by the party responsible for compliance could void the user's
authority to operate the equipment. (2) Shielded interface cables and AC power cord, if any, must be used in order to
comply with the emission limits.
CISPR PUB.22 Class A COMPLIANCE:
This device complies with EMC directive of the European Community and meets or exceeds the following technical
standard. EN 55022 - Limits and Methods of Measurement of Radio Interference Characteristics of Information
Technology Equipment. This device complies with CISPR Class A.
WARNING:
This is a Class A product. In a domestic environment this product may cause radio interference in which case the user
may be required to take adequate measures.
CE NOTICE
Marking by the symbol CE indicates compliance of this equipment to the EMC directive of the European Community.
Such marking is indicative that this equipment meets or exceeds the following technical standards: EN
55022:2006+A1:2007, Class A, EN55024:2010, and EN60950-1:2006

CTC Union Technologies Co., Ltd.
Far Eastern Vienna Technology Center (Neihu Technology Park)
8F, No. 60, Zhouzi St.
Neihu, Taipei, 114
Taiwan
Phone: [phone]
FAX: [phone]
FMUX1001 / FMUX101
16 Channel Modular Fiber Multiplexer with E1/ T1, Data, POTS and 1G Ethernet Trunk.
Installation and Operation Manual
Version 1.0 Nov 25, 2015 (First Release)
Version 1.1 Nov 1, 2016 (Update)
This document supports the following models:
FMUX1001 16-Ch. Modular E1/T1, DATA, POTS with 4-port Gigabit Ethernet Switch and 850M Ethernet trunk
FMUX101 16-Ch. Modular E1/T1, DATA, POTS with 4-port Fast Ethernet Switch and 100M Ethernet trunk
This document is the first official release manual. Please check CTC Union's website for any updated manual or contact
us by E-mail at [e-mail]. Please address any comments for improving this manual or to point out
omissions or errors to [email protected]. Thank you.
2015-2016 CTC Union Technologies Co., Ltd.
All Rights Reserved
The contents of this document are subject to change without any prior notice.

Table of Contents
i
CHAPTER 1. INTRODUCTION........................................................................................................................................7
1.1 GENERAL ......................................................................................................................................................................7
1.2 FUNCTIONAL DESCRIPTION...............................................................................................................................................7
1.3 TECHNICAL SPECIFICATIONS............................................................................................................................................10
1.4 E1 SIGNAL STRUCTURE..................................................................................................................................................13
1.5 T1(DS1) SIGNAL STRUCTURE .........................................................................................................................................13
1.6 APPLICATIONS /CAPABILITIES .........................................................................................................................................14
CHAPTER 2. INSTALLATION........................................................................................................................................15
2.1 GENERAL ....................................................................................................................................................................15
2.2 SITE PREPARATION .......................................................................................................................................................15
2.3 MECHANICAL ASSEMBLY................................................................................................................................................15
2.4 ELECTRICAL INSTALLATION..............................................................................................................................................16
2.4.1 Power connection.............................................................................................................................................16
2.4.2 Rear and Front panel connectors .....................................................................................................................17
2.5 REMOVAL/REPLACEMENT PROCEDURES ...........................................................................................................................18
2.5.1 SFP Removal / Replacement (Hot Swappable) .................................................................................................18
2.5.2 Top cover Removal / Replacement for internal access.....................................................................................19
2.5.3 Power Module Removal / Replacement ...........................................................................................................20
2.5.4 Tributary Module Removal / Replacement ......................................................................................................20
CHAPTER 3. CONSOLE OPERATION ............................................................................................................................21
3.1 INTRODUCTION ............................................................................................................................................................21
3.2 TERMINAL MODE OPERATION ........................................................................................................................................21
3.3 CONNECTING TO THE FIBER MULTIPLEXER .........................................................................................................................22
3.4 CONFIGURING IN CONSOLE MODE...................................................................................................................................23
3.4.1 Login.................................................................................................................................................................23
3.4.2 Main Menu.......................................................................................................................................................23
3.4.3 Optical Configuration Menu.............................................................................................................................24
3.4.4 LAN Configuration Menu..................................................................................................................................26
3.4.5 Tributary Configuration Menu .........................................................................................................................28
3.4.6 Alarm Configuration Menu ..............................................................................................................................30
3.4.7 Device Configuration Menu..............................................................................................................................31
3.4.8 SNMP Manager Configuration Menu...............................................................................................................32
3.4.9 Log Information Menu .....................................................................................................................................33
3.4.10 Store Parameters Function.............................................................................................................................33
3.4.11 Upgrade Function...........................................................................................................................................34
3.4.12 Password Configuration Menu.......................................................................................................................38
3.5 REMOTE MANAGEMENT................................................................................................................................................38
CHAPTER 4. WEB BASED OPERATION ........................................................................................................................39
4.1 GENERAL ....................................................................................................................................................................39
4.2 TCP/IP CONFIGURATION...............................................................................................................................................39
4.3 BROWSER LOGIN..........................................................................................................................................................39
4.3.1 Panel Display ....................................................................................................................................................40
4.3.2 System - Local Display ......................................................................................................................................41
4.3.3 System - Remote Display ..................................................................................................................................42
4.3.4 System - Password Setting ...............................................................................................................................43
4.3.5 Chassis - Panel Display .....................................................................................................................................44
4.3.6 SNMP - Manager Setup....................................................................................................................................45
4.3.7 SNMP - Log Information ...................................................................................................................................45
4.4 CONFIGURATION ..........................................................................................................................................................46
4.4.1 Local - Optical...................................................................................................................................................46
4.4.2 Local - LAN........................................................................................................................................................48
4.4.3 Local - Port (Slot) ..............................................................................................................................................50
4.5 REMOTE MANAGEMENT................................................................................................................................................51

Table of Contents
ii

Chapter 1. Introduction
7
Chapter 1. Introduction
1.1 General
Thank you for choosing FMUX1001 (or FMUX101) modular Fiber Multiplexer. If you would like to skip right to
the installation and configuration of the Multiplexer, proceed to Chapters 3 and 4.
The Fiber Multiplexer is a 1U (1.75") high standalone or 19" rack mountable E1/T1/DATA/POTS/LAN
multiplexer over fiber link, built upon a flexible modular design. The Fiber Multiplexer provides an economic optical
connection solution in high-density E1 and/or T1 installations such as between branch offices or for 2G/3G mobile
backhaul, where multiple high speed synchronous data communications are required with high-speed Ethernet
backhaul. By utilizing a modular design, multiple interfaces such as E1/T1, DATA (V.35, RS520/449/232, X.21), Async
RS232 and POTS (FXO/FXS) can be provided in a point-to-point over fiber architecture. The standard unit is a chassis
with local control and two slots for power modules (AC or DC) to provide single or dual redundant power. Four
module slots are available for 4-channel tributary cards. The fiber aggregate uses SFP cages that support any industry
standard 155Mbps SFP module (FMUX101 model) or 1.25Gbps SFP module (FMUX1001 model). The range of
transmission for optical connection is from 2km (for multi-mode) up to 120km (single mode). Standard management
features include local LCD with menu pushbuttons, local serial console (menu based) and local/remote IP
management via Telnet, HTTP(web) and SNMP.
1.2 Functional Description
The Fiber Multiplexer basic chassis has two slots for hot swappable power modules. Depending on the
options ordered, power may be derived from single AC 100~240VAC, single DC +18~60VDC, dual AC 100~240VAC, dual
DC +18~60VDC, or AC plus DC power sources. The Fiber Multiplexer provides all tributary connections on the rear
via hot swappable slide in module cards. The front panel provides the aggregate SFP cages, LCD/Menu Keys, LED
indicators, and connectors for alarm relays, order wire, clear channel RS-232, and console.
The 4-CHANNEL E1B Tributary Card has 4 pairs of BNC (75 Ohm unbalanced) connectors for E1 Line interface
connections supporting four separate E1 channels at a transmission rate of 2.048Mb/s (transparent unframed E1)
each. This card may be placed in any slot of the Fiber Multiplexer. A maximum of 4 cards will provide 16-Channels of
E1.
The 4-CHANNEL E1/T1R Tributary Card provide 4 RJ-45 (120/100 Ohm balanced, software selectable)
connectors for E1/T1(DS1) Line interface connections supporting four separate E1/T1(DS1) channels at a transmission
rate of 2.048/1.544Mb/s (transparent unframed E1/T1) each. E1 and T1 configuration cannot be mixed; all ports must
be either E1 or T1.
The 4-CHANNEL DATA Tributary Card provides 1 HD68 pin connector. When used in combination of a special
adapter cable, 4-channels of V.35 (MB34F), RS-530/232 (DB25F), RS-449 (DB37F) or X.21 (DB15F) are provided. Each
channel is capable of nx64kbps synchronous data transmissions up to 2.048Mb/s.
The 4-CHANNEL RS232/Async Tributary Card provides 1 HD68 pin connector. When used in combination of a
special adapter cable, 4-channels of RS232 (DB25F) are provided. Each channel is capable of transparent asynchronous
data transmissions up to 115.2kb/s.
The 4-CHANNEL POTS Tributary Card provides 4 RJ-11 connectors. Two 4-channel card models provide either
4xFXO (connects to Central Office or PSTN) or 4xFXS (connect to telephone) channels.
The built-in Ethernet Switch provides four RJ-45 connectors for 10/100/1000M Ethernet (up to 850M trunk
speed for FMUX1001 model) or 10/100M Ethernet (wire-speed 100M trunk for FMUX101 model). The switch function
provides auto/forced per port settings, Port based VLAN, 1Q tag based VLAN, ingress/egress bandwidth control and
Ethernet flow control enable/disable.
LEDs on the front panel will show power, alarm and channel statuses for all ports.

Chapter 1. Introduction
8
The Fiber Multiplexer E1 and T1 Interface Ports fully meet all E1 and T1 specifications including ITU-T G.703,
G.704, G.706, G.732, G.733, G.823 and G.824. The Ethernet switch meets all Ethernet specifications for IEEE802.3,
IEEE802.3u and IEEE802.3ab.
Each E1/T1-CHANNEL Port features diagnostic capabilities for performing local loop back or remote loop back.
The loop back function is controlled by LCD/Menu keys, the terminal mode (RS-232 console) or via Telnet, Web or
SNMP set commands.
The unit operates from an internal free running oscillator. The Fiber Multiplexer is completely transparent to
clocking and data transmission. This makes configuration of the MUX extremely easy.
Configuration of the Fiber Multiplexer is accomplished via local control on the LCD/Menu Keys,
asynchronous RS-232 port with a standard VT-100 terminal, via HTTP (Web) and Telnet, or via any standard SNMP
network management software over IP.
The Fiber Multiplexer also includes the ability to do in-band remote configuration. Once the fiber optic link
has been established, the remote unit may be configured or status checked from the local unit using any of the
available management options.

Chapter 1. Introduction
9
The following graphic shows the major components which make up the Fiber Multiplexer . It shows a unit
with redundant power modules (AC+DC) and four 4-channel tributary cards installed.
Figure 1-1 : Fiber Multiplexer Major Components
DC
AC
SFP
4xE1

Chapter 1. Introduction
10
1.3 Technical Specifications
E1 Link
Framing
Unframed (transparent)
Bit Rate
2.048 Mb/s
Line Code
AMI
HDB3
Line Impedance
Unbalanced 75 ohms (BNC)
Balanced 120 ohms (RJ-45)
Receiver sensitivity
+3 to -12dB (short haul)
"Pulse" Amplitude
Nominal 2.37V+/-10% for 75 ohms
Nominal 3.00V+/-10% for 120 ohms
"Zero" Amplitude
+/-0.3V
Transmit Frequency Tracking
Internal Timing
+/-50 ppm
Jitter Performance
According to ITU-T G.823
Complies With
ITU-T G.703, G.704, G.706 and G.732
Interface Connectors
RJ-45
BNC
Test Loops
LLB (Local Loop Back)
RLB (Remote Loop Back)
RRLB (Request Remote Loop Back)
T1 Link
Framing
Unframed (transparent)
Bit Rate
1.544 Mb/s
Line Code
AMI
B8ZS
Line Impedance
Balanced 100 ohms (RJ-45)
Receiver sensitivity
+3 to -12dB (short haul)
"Pulse" Amplitude
Nominal 3.00V+/-10% for 100 ohms
"Zero" Amplitude
+/-0.3V
Transmit Frequency Tracking
Internal Timing
+/-50 ppm
Jitter Performance
According to ITU-T G.824
Complies With
ITU-T G.703, G.704, G.706 and G.733
Interface Connectors
RJ-45
Test Loops
LLB (Local Loop Back)
RLB (Remote Loop Back)
RRLB (Request Remote Loop Back)
Ethernet Switch
Interface Type
10Base-T, 100Base-TX, 1000Base-T (auto-negotiation)
10Base-T, 100Base-TX (FMUX101)
Interface Connector
RJ-45
WAN Data Rate
850M (FMUX1001) / 100M (FMUX101)
Complies with
IEEE802.3 10Base-T
IEEE802.3u 100Base-TX
IEEE802.3ab 1000Base-T (FMUX1001)
IEEE802.3x Ethernet flow control
IEEE802.1Q Tagged VLAN
Configuration modes
Auto, forced, Port Based or 1Q VLAN, Ethernet flow
control, ingress/egress bandwidth control
MTU
10240 bytes

Chapter 1. Introduction
11
Data Link (V.35/RS-530/X.21/RS-449)
Channels
4 per module (Data Circuit-Terminating Equipment)
Framing
N64
Bit Rate
64kb/s to 2.048 Mb/s (nx64 where n=1 to 32)
Line Code
NRZ
Line Impedance
Balanced 100 ohms
"Pulse" Amplitude (Mark)
5V (logical zero)
"Pulse" Amplitude (Space)
-5V (logical one)
Transmit Frequency Tracking
Internal Timing
+/-50 ppm
Timing modes
External Clock (from DTE's TTC)
Internal Clock
Recover from Remote (transparent timing)
Complies With
TIA/EIA-422
Interface Connectors
VHDCI .8mm 68-pin (with adapter cable)
V.35-HB34F,RS-530-DB25F,X.21-DB15F,RS-449-DB37F
Test Loops
LLB (Local Loop Back)
RLB (Remote Loop Back)
RRLB (Request Remote Loop Back)
V.54
POTS Link (Plain Old Telephone Service)
Channels
4 per module (as FXO or FXS depending on module)
Mode
Bi-directional (full duplex)
Frequency Response
300 ~ 3300Hz
Coding
G.711
Line Impedance
unbalanced 600 ohms
Transmission Medium
2-wire, twisted pair, 24AWG or greater
Interface Connectors
4 x RJ-45 (supports RJ-11 connections on center 2 pins)
Local Setup and Configuration
Console
RS-232 async DCE
Terminal Parameters
Speed: 115,200
Bits: 8 bits
Parity: None
Stop: 1 bit
Flow Control: None
Pin Assignment (RJ-45)
2 - RD Receive Data (output towards DTE)
3 - TD Transmit Data (input from DTE)
1 - SG Signal Ground
Alarm Output Relays
Alarm Output
One of Normally Open/Closed contact for alarms, both
audio and visual.
Contact ratings: 1A at 30 VDC resistive
or 0.5A at 125 VAC resistive

Chapter 1. Introduction
12
LED Indicators
PWR1
Green
Power Module 1 active
PWR2
Green
Power Module 2 active
OP1
Green
Off = off
On = optical link is good
blinking = working port
OP2
Green
Off = off or disabled
On = optical link is good
Blinking = working port
Channels
Dual Color
One LED for each channel (1-8) or (1-16)
Green = E1/T1 Signal Present
Off = Out of Service
Amber = E1/T1 Loss of Signal
Amber (blinking) = channel in loopback mode
Minor
Amber
Indicates a minor alarm is present.
Major
Red
Indicates a major alarm has occurred, includes E1 or T1 BPV,
signal loss, LAN link down, or fiber sync slip.
RDI
Red
Remote Defect Indicator, indicates an alarm has occurred in
the remote multiplexer, includes E1, T1, LAN and fiber signal
loss.
SYS
Green
Indicates the system is normal
Port (Slot)
Green
Indicates a tributary card is installed in the module slot.
Phone
Green
Indicates the order wire is in use.
LNK (LAN)
Green
4 LEDs, one for each LAN port
On = LAN link established
Flashing = link with traffic
Off = no LAN link or port disabled
Speed (LAN)
Dual Color
4 LEDs, one for each LAN port
Amber On = The LAN speed is 1000M (FMUX1001 only)
Green On = The LAN speed is 100M
Off = If link is present, the LAN speed is 10M
All fiber transceivers in the fiber multiplexer incorporate an automatic laser shutdown feature (ALS) designed
to protect personnel that may come into contact with a disconnected fiber connection. This feature may also be
disabled for testing purposes via console terminal mode or SNMP (when SNMP option is installed).
Physical
Height:
43 mm (1.75")
Width:
438 mm (17.25")
Depth:
250 mm (9.875")
Weight:
4 kg (8.8 lb.) Net
Power supply
Voltage (AC source)
100 ~ 240 VAC±10% (90 ~ 264VAC absolute)
Voltage (DC source)
18 ~ 60 VDC
Frequency
47 to 63 Hz for AC power
Power consumption
<30 Watts
Environment
Temperature
-10 ~ 60oC / 14 ~ 140oF
Humidity
0 to 95% non-condensing

Chapter 1. Introduction
13
Miscellaneous
MTBF
>65,000 hours
Emission compliance
meets FCC part 15 Sub B (class A)
EN55022:1994/A1:1995/A2:1997,
EN61000-3-2:1995, EN61000-3-3:1995,
and EN50082-1:1997
Safety compliance
EN60950-1
1.4 E1 Signal Structure
E1 link line rate
The E1 line operates at a nominal rate of 2.048Mb/s.
E1 link line coding
The basic E1 line signal is coded using either the Alternate Mark Inversion (AMI) or HDB3 rule.
In the AMI format, "ones" are alternately transmitted as positive and negative pulses, whereas "zeros" are
transmitted as a zero voltage level. AMI is not used in most 2.048Mb/s transmissions because synchronization loss
occurs during long strings of data zeros.
In the HDB3 format, a string of four consecutive zeros is replaced with a substitute string of pulses containing
an intentional bipolar violation. The HDB3 code substitutions provide high pulse density so that the receiving
equipment is able to maintain synchronization with the received signal.
The 4-CHANNEL E1 supports two E1 line codes:
AMI coding.
HDB3 coding.
The 4-CHANNEL E1 supports only transparent unframed format. ie., The E1 will pass through with its
original framing structure completely intact.
1.5 T1(DS1) Signal Structure
T1 link line rate
The T1 line operates at a nominal rate of 1.544Mb/s.
T1 link line coding
The basic T1 line signal is coded using either the Alternate Mark Inversion (AMI) or B8ZS rule.
In the AMI format, "ones" are alternately transmitted as positive and negative pulses, whereas "zeros" are
transmitted as a zero voltage level. AMI is not used in most 1.544Mb/s transmissions because synchronization loss
occurs during long strings of data zeros.
In the B8ZS format, a string of eight consecutive zeros is replaced with a substitute string of pulses containing
an intentional bipolar violation. The B8ZS code substitutions provide high pulse density so that the receiving
equipment is able to maintain synchronization with the received signal.
The 4-CHANNEL T1 supports two T1 line codes:
AMI coding.
B8ZS coding.
The 4-CHANNEL T1 supports only transparent unframed format. ie., The T1 will pass through with its original
framing structure completely intact.

Chapter 1. Introduction
14
1.6 Applications / Capabilities
In the following example, the Fiber Multiplexer utilizes an optical fiber connection between a pair of units to
provide up to 16 channels of E1, T1, and 1 to 4 ports of Trunk Ethernet between the units.
The timing scheme for typical E1 or T1 equipment is to transparently pass timing from a timing source unit on
one side, to a timing slaved unit on the other. Each of the up to 16 available channels of the Fiber Multiplexer is
independent of any other channel for framing or timing.
Figure 1-2 : Typical Point-to-Point Application of Fiber Multiplexer

Chapter 2. Installation
15
Chapter 2. Installation
2.1 General
This chapter explains in detail the requirements and procedures for the installation of the Fiber Multiplexer
Standalone/Rack Mount Fiber Optical Multiplexer.
2.2 Site Preparation
Install the Fiber Multiplexer within reach of an easily accessible grounded AC outlet. The outlet should be
capable of furnishing 100 to 240 VAC (18 to 60 VDC for DC supply). Allow at least 10cm (4 inch) clearance at the rear
and front of the Fiber Multiplexer for signal lines and interface cables.
2.3 Mechanical Assembly
The Fiber Multiplexer is designed for rack mount installation and only requires 1U space (1 3/4") in a
standard EIA 19 inch rack. It is highly recommended that the unit be placed in a rack. The Fiber Multiplexer is
delivered completely assembled, with the exception of the rack mount adapter brackets. No provision is made for
bolting the Fiber Multiplexer to a tabletop.
Figure 2-1 : Rack mount Installation of the Fiber Multiplexer

Chapter 2. Installation
16
2.4 Electrical Installation
2.4.1 Power connection
For the AC power module, AC power (100~240VAC) is supplied to the Fiber Multiplexer through a standard
IEC C14 3-prong receptacle, located on the rear of the chassis. For the DC power module, DC –48V (18~60VDC) is
connected to the terminal block, observing the proper polarity. The modules are hot swappable as long as two
modules are installed. Combinations of dual AC, dual DC or AC+DC are all allowed. If only a single power module is
installed, there is no redundancy provided. The Fiber Multiplexer should always be grounded through the
protective earth lead of the power cable in AC installations, or via the frame ground connection for DC installations. A
separate chassis ground is provided on the rear, far right side of the chassis.
Figure 2-2 : Supply connections, AC and DC model modules shown
Left: Live line
Right: Neutral line
Middle: Ground
Right: -V (-48V)
Left: +V (0V)
Middle: Frame Ground
DC IN
+V FG -V
18~60VDC
IEC C13 line plug

Chapter 2. Installation
17
2.4.2 Rear and Front panel connectors
All Channels are modular on the rear of the Fiber Multiplexer. Modular designs allow for a multiplexer that
supports TDM, Data and Voice.
Figure 2-3 : Rear Panel Connections
The front panel of the Fiber Multiplexer, holds the optical interfaces, the status and alarm LEDs, the call
button, order wire jack, clear RS-232 channel, the local management console port and the 4-port Ethernet
connections. The optical interfaces are of the pluggable SFP type. The two optical interfaces provide 1+1 fiber
protection.
Figure 2-4 : Front Panel Controls and Indicators
16 x E1/T1 balanced RJ-45
DC Mains
Terminal Block
Hot Swappable
Power Modules
AC Mains
IEC C14
4 Hot Swappable Tributary Modules
Local LCD and menu keys
Optical
Interfaces
(SFP)
Alarm Contacts
RS-232
Clear Channel
Console
Management
Port
Optical, Channel,
Power and Alarm
Status Indicators
Order Wire
4xGbE Ports
(FMUX1001)
4xFE Ports
(FMUX101)
Order Wire
Call Button
Alarm Cut Off
Ext. Clock

Chapter 2. Installation
18
2.5 Removal/Replacement Procedures
2.5.1 SFP Removal / Replacement (Hot Swappable)
The Gigabit Ethernet Fiber Multiplexer accepts any SFP unit that complies with the MSA standard. Follow all
ESD precautions when handling the SFP modules. Fiber optic components and cables are very sensitive to dirt, dust
and mishandling, especially in high-speed networks. Dirty or mistreated fiber may cause errors and an unwanted
degradation of signal quality. Remove the dust caps on SFP and patch cable connectors only when ready to plug in
optical cables.
When choosing SFP optical modules, the SFP must be able to support the required data rate. SFP with a data
rating of 1.25Gbps is required for FMUX1001, while 155Mbps are required for FMUX101. Make sure the SFP modules
chosen are suitable for the required data rate.
Installation
CTC Union supplied SFP modules are of the Bale Clasp type. The bale clasp SFP module has a bale clasp that
secures the module into the SFP cage.
Figure 2-5 : Optical Interface Removal / Replacement (while in service)
•Removing a Bale Clasp SFP Module
Step 1 Open the bale clasp on the SFP module. Press the clasp downward with your index finger.
Step 2 Grasp the SFP module between your thumb and index finger and carefully remove it from the SFP cage.
•Inserting a Bale Clasp SFP Module into an SFP cage
Step 1 Close the bale clasp upward before inserting the SFP module.
Step 2 Line up the SFP module with the port, and slide it into the cage until it seats.
Figure 2-6 : SFP cages located on front panel
SFP Cages
1+1 Optical

Chapter 2. Installation
19
2.5.2 Top cover Removal / Replacement for internal access
Normally, there is no need to remove the cover of the unit. All interfaces are modular and no user serviceable
components are inside.
***CAUTION***
This procedure should only be performed by qualified service personnel. In addition, all power connections
must be removed before even attempting to open the case.
1. If the unit is installed in a rack, it must be removed along with all power connections.
2. The rack mounting brackets, if installed, must be removed.
3. Remove all tributary modules and all power modules.
3. The top cover is held in place by ten screws.
4. Once all ten screws are removed, the top panel just lifts off. The internals are now exposed.
Follow the procedure in reverse to re-install the top panel. Install the screws but at first do not tighten. Make
sure all ten screws are started and not cross threaded, then tighten them in a crisscross pattern. The screws are only
3mm, so do not over tighten or they may become stripped or broken. Re-install the rack mount ears if they were
removed.
Figure 2-7 : Top cover removal (while out of service)

Chapter 2. Installation
20
2.5.3 Power Module Removal / Replacement
This procedure should only be performed after the power connections to module have been removed.
1. There is no need to remove the unit from a rack.
2. Remove the single flat head screw located directly in the middle between the two power modules.
3. There is no need to unscrew the thumbscrew. While holding the thumbscrew, pull the power module
straight out.
4. Insert the module in the reverse order.
Figure 2-8 : Power module Removal / Replacement
2.5.4 Tributary Module Removal / Replacement
1. There is no need to remove the unit from a rack.
2. Remove the single flat head screw located at the top-middle of tributary module.
3. There is no need to unscrew the thumbscrew. While holding the thumbscrew, pull the module straight out.
4. Insert the module in the reverse order.
Figure 2-9 : Tributary module Removal / Replacement