Gigabit “twister”® and
SONET “twister”®
“twister”™2152
“twister”™2152
1000BASE-LX
1000BASE-TX
1000BASE-LX
1000BASE-SX
PWR
PWR
BWDM
TX
MM
RX
BWDM
LINK
LINK
LINK
LINK
“twister”™2152
“twister”™2152
1000BASE-LX
1000BASE-SX
1000BASE-LX
1000BASE-TX
PWR
PWR
TX
SM
RX
TX
MM
RX
LINK
TX
SM
RX
LINK
LINK
LINK
“twister”™2152
“twister”™2151
1000BASE-LX
1000BASE-TX
1000BASE-LX
1000BASE-SX
PWR
PWR
SM
TX
SM
RX
MM
TX
RX
LINK
LINK
LINK
LINK
“twister”™2135
“twister”™2125
OC-12
OC-12
OC-3
OC-3
PWR
PWR
TX
SM
RX
MM
TX
RX
TX
SM
TX
MM
RX
RX
LINK
LINK
LINK
LINK
Installation & User Guide
2151-AD-01 • 2152-1A-01 • 2152-1D-01 • 2152-1F-01 • 2152-17-01
2152-1J-01 • 2152-1K-01 • 2152-1M-01 • 2152-1X-01 • 2152-1Y-01
2152-AA-01 • 2152-AD-01 • 2152-AF-01 • 2152-A7-01 • 2152-AJ-01
2152-AX-01 • 2152-AY-01 • 2152-DD-01 • 2152-DF-01 • 2152-D7-01
2152-DJ-01 • 2152-77-01 • 2152-JJ-01 • 2125-34-01 • 2125-37-01
2135-34-01
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Table of Contents
Metrobility Gigabit “twister” and SONET “twister”
Installation & User Guide
Introduction ................................................................................................................ 4
Overview ..................................................................................................................... 5
Installation Guide ....................................................................................................... 6
STEP 1: Unpack the “twister” and Accessories .......................................... 6
STEP 2: Choose an Appropriate Location .................................................. 6
STEP 3: Set the DIP Switches ..................................................................... 7
STEP 4: Connect to the Network ................................................................ 8
STEP 5: Apply Power.................................................................................. 9
User Guide ................................................................................................................ 11
LED Indicators .......................................................................................... 11
Link Loss Return (LLR)............................................................................ 12
Link Loss Carry Forward (LLCF)............................................................. 13
Copper Loss Carry Forward (CLCF) ........................................................ 14
Topology Solutions ................................................................................... 15
Technical Specifications ............................................................................ 15
Product Safety, EMC and Compliance Statements ................................... 18
Warranty and Servicing ............................................................................. 19
Metrobility, Metrobility Optical Systems, Lancast, and “twister” are registered trademarks of Metrobility Optical
Systems, Inc. The Metrobility Optical Systems logo is a trademark of Metrobility Optical Systems, Inc.
The information contained in this document is assumed to be correct and current. The manufacturer is not
responsible for errors or omissions and reserves the right to change specifications at any time without notice.
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Introduction
The Metrobility Gigabit “twister” and SONET “twister” represent the latest
technology available for extending Gigabit Ethernet, OC-3/STM-1 and OC-12/STM-
4 networks. Since Metrobility first developed “twister” media conversion, it has set
the standard for providing affordable means of integrating mixed media networks.
As LANs/WANs grow and evolve, this technology provides an ideal solution for
building effective migration strategies.
In addition to the standalone unit, the “twister” is available as an SNMP manageable
module for the Lancast® Intelligent 7500 chassis and the Radiance central or premise
service platforms.
The information in this guide will help you to install and start using your “twister”.
4
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Overview
The Metrobility “twister” provides seamless integration between fiber optic
multimode and singlemode segments in Gigabit Ethernet, OC-3/STM-1 or OC-12/
STM-4 environments. It supports copper to fiber translation as well as wavelength
conversion from 850nm to 1310 or 1550nm, and from 1310nm to 1550nm. With the
“twister”, you can increase your network reach up to 70km on a single segment. For
networks that require extended distance support, use the 2152-series repeaters. The
repeaters recover incoming data and regenerate the signal, thus allowing multiple
hops over any distance.
The Gigabit “twister” and SONET “twister” offer the following key features:
•
•
A Link Loss Return (LLR) switch on each fiber optic port to aid in
troubleshooting remote network connections.
Link Loss Carry Forward (LLCF) functionality on the fiber-to-fiber
units or Copper Loss Carry Forward (CLCF) on the copper-to-fiber
models. LLCF and CLCF work with LLR in diagnosing network
connections.
•
Signal recovery that restores data integrity, enabling repetition over
unlimited distances. (2152-series only)
•
•
•
Auto-sensing copper port that eliminates the need for crossover cables.
Full-duplex support.
Gigabit Ethernet (1Gbps), OC-3/STM-1 (155Mbps) or OC-12/STM-4
(622Mbps) support.
•
A link LED on each port to indicate that the port is receiving idle link
signals or a satisfactory level of light.
•
•
•
•
IEEE 802.3 Sec. 14 / IEEE 802.3z compliance (Gigabit “twister” only).
Universal desktop power supply (100-240V / 50-60Hz).
Data transmission over singlemode fiber up to 70km.*
Numerous connectivity options, including bidirectional wavelength
division multiplexed (BWDM) fiber.
*Actual distance should be calculated based on the actual link loss budget.
Gigabit “twister” and SONET “twister”
5
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F
I
ollo
n
w th
s
e sim
t
p
a
le ste
l
ps
l
ou
a
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o
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ection o
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ide t
i
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d
stall and start
e
using your Metrobility “twister”.
Unpack the “twister” and Accessories
Check that the following components have been included:
•
•
•
•
Metrobility “twister”
Power supply
Power cord
Four (4) rubber feet
Your order has been provided with the safest possible packaging, but
shipping damage does occasionally occur. Inspect your order carefully. If
you discover any shipping damage, notify your carrier and follow their
instructions for damage and claims. Save the original shipping carton in
case return or storage of the unit is necessary.
Choose an Appropriate Location
The “twister” is intended for use in either office or industrial environments.
The unit must be located within six (6) feet of the AC power source being
used and placed as far away as possible from electrical noise generating
equipment such as copiers, electrostatic printers and other motorized
equipment. If exposed twisted-pair wiring is used nearby, the wiring should
be routed as far away as possible from power cords and data cables to
minimize interference.
2
3
The unit may be oriented in any manner which allows you to make physical
connection to the power supply and leaves a minimum of six (6) inches of
space for proper ventilation.
Set the DIP Switches
The Metrobility “twister” includes a set of six DIP switches located on the
back of the unit. (See figure below.) These switches are used to enable/
disable functions and are clearly marked. Unmarked switches are nonfunc-
tional. LLR1 controls Link Loss Return on Port 1. LLR2 controls Link
Loss Return on Port 2. LLCF sets Link Loss Carry Forward on the fiber-
to-fiber repeaters (LLCF is nonfunctional on the fiber-to-fiber converters).
CLCF sets Copper Loss Carry Forward on the copper-to-fiber repeaters.
6
Installation Guide
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“twister”™2152
1000BASE-LX
1000BASE-SX
PWR
LLCF
LLR1LLR2
TX
SM
RX
LINK
MM
RX
TX
OFF
ON
LINK
PWR
DC INPUT/5VDC
Port 2
Port 1
LLR1
LLR2
LLR1
LLR2
CLCF
LLR2
LLCF
LLCF
OFF
ON
OFF
ON
ON
or
or
OFF
DIP switches (2152 TX-FX)
DIP switches (2152 FX-FX)
DIP switches (all others)
NOTE: The ON/OFF positions are not the same on all units.
By default, all DIP switches are disabled.
Link Loss Return (LLR) Switch
The Metrobility “twister” incorporates Link Loss Return functionality as an
aid in troubleshooting remote fiber connections. When LLR is enabled on a
port, loss of the receive (RX) link at the port disables the transmit (TX) link
on the same port. LLR is set independently on each fiber port.
LLR1 enables/disables Link Loss Return on Port 1, and LLR2 enables/
disables it on Port 2. To enable Link Loss Return, set the LLR switch to the
ON position. Set the switch OFF to disable the function. The unit is shipped
with LLR disabled. For more information, refer to Link Loss Return in the
User Guide section of this manual.
Link Loss Carry Forward (LLCF) Switch
On the fiber-to-fiber repeaters, Link Loss Carry Forward is provided as an
additional aid for troubleshooting remote connections. If LLCF is enabled
and the “twister” loses link on one of its receive ports, LLCF inhibits the
transmit link out the opposite port.
For example, if LLCF is enabled and the “twister” fails to detect link on
Port 2, the “twister” will not transmit link pulses out of Port 1. In doing
this, LLCF provides a way to extend the link loss indication beyond a
single segment.
Gigabit “twister” and SONET “twister”
7
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LLCF is enabled when the LLCF switch is in the ON position. The fiber-to-
fiber repeater is shipped with LLCF disabled. On the fiber-to-fiber convert-
ers (2151-AD-, 2125-xx- and 2135-34-01), LLCF is always enabled and
cannot be disabled. Sliding the LLCF switch up and down on these models
has no effect. LLCF is not applicable to the copper-to-fiber repeaters. For
more information, refer to Link Loss Carry Forward in the User Guide
section of this manual.
Copper Loss Carry Forward (CLCF) Switch
The copper-to-fiber repeater provides Copper Loss Carry Forward to assist
in identifying a lost copper link. When CLCF is enabled and the repeater
loses link on its copper port, the card prevents its fiber port from transmit-
ting link pulses. CLCF has no effect on the copper port, which continually
transmits link pulses, even if the fiber port loses link.
CLCF is enabled when the CLCF switch is in the ON position (down). The
unit is shipped with CLCF disabled. For more information, refer to Copper
Loss Carry Forward in the User Guide section of this manual.
Connect to the Network
The “twister” offers the ease of plug-and-play installation.
4
Twisted-Pair Interface (2152-1x-01 only)
The twisted-pair port provides an auto-sensing RJ-45 connector that
supports a maximum segment length of 100 meters. Use Category 5e
cables. Because the port is auto-sensing, crossover cables are not needed.
“twister” ™2152
1000BASE-LX
1000BASE-TX
PWR
RX
T
LINK
8
Installation Guide
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Fiber Optic Interface
Multimode ports are labeled MM. Singlemode ports are labeled SM.
Extended distance ports are labeled LH (Long Haul) or ELH (Extended
Long Haul). Each fiber port provides an SC or LC connector. For informa-
tion about the cable lengths supported by each model, refer to the table in
the Technical Specifications section.
When making connections, be sure that the transmit (TX) optical conductor
of the “twister” connects to the receive (RX) optical conductor of the
connected device; and be sure that the transmit (TX) optical conductor of
the device connects to the receive (RX) optical conductor of the “twister”.
Once power is applied to the unit, correct connectivity can be verified via
the LINK LED.
BWDM Interface
The bidirectional wavelength division multiplexed (BWDM) port provides
one singlemode SC connector that supports a maximum segment length of
20km. BWDM units must always be used in complementary pairs. That is,
a -1X or -AX must be connected to a -1X or -AY. The -1X and -AX units
are designed to transmit data at a wavelength of 1550nm and receive at
1310nm. Correspondingly, the -1Y and -AY units transmit data at 1310nm
and receive at 1550nm.
up to 20 km
Metrobility
-1X or -AX Model
Metrobility
-1Y or -AY Model
Apply Power
Power is applied to the “twister” from the desktop power supply. The
power supply is equipped with an S760 hollow-type plug for insertion into
the DC jack located on the back of the unit and the standard IEC 320-type
AC power receptacle. All standalone units use a 100-240V universal
desktop power supply.
5
Connect the DC input jack located on the back of the “twister” before
connecting to the AC outlet.
Gigabit “twister” and SONET “twister”
9
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OFF
ON
PWR
DC INPT/5VDC
Upon receiving power, the “twister” goes into normal operation mode.
Verify valid connections via the PWR LED on the front panel.
If an additional extension cord is used to connect the power supply to the
outlet, follow the guidelines below.
While one end of the AC power cord can be fitted with whatever plug is
standard for the country of operation, the end that connects to the “twister”
unit’s power supply must have a female plug that fits this type of AC
receptacle.
• AC 115V (North American): Use a UL-listed and CSA-certified cord
set consisting of a minimum No. 18 AWG, type SVT or SJT three-
conductor cord (15 ft. maximum length) and a parallel blade ground-
ing-type attachment plug rated 15A, 125V.
• AC 230V (USA): Use a UL-listed cord set consisting of a minimum
No. 18 AWG, type SVT three-conductor cord (15 ft. maximum
length) and a Tandem blade grounding-type attachment plug rated
15A, 250V.
• 240V (outside USA): Use a cord set consisting of a minimum No. 18
AWG cord and grounding-type attachment plug rated 15A, 250V.
The cord set should have the appropriate safety approvals for the
country in which the “twister” is being installed and be marked HAR.
10
Installation Guide
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LED Indicators
The Metrobility “twister” provides three LEDs on the front panel for the visible
verification of unit status and proper functionality. The LEDs also aid in trouble-
shooting and overall network diagnosis and management.
When lit, the LEDs indicate the following status:
• PWR (power): The unit is powered ON.
• LINK (Port 1): Port 1 is receiving idle link signals (if Port 1 is a copper port)
or the input light level is satisfactory (if Port 1 is a fiber port).
• LINK (Port 2): The input light level is satisfactory on Port 2.
“twister”
PWR
SM
TX
MM
RX
TX
RX
LINK
LINK
Power
(Port 2)
(Port 1)
Gigabit “twister” and SONET “twister”
11
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Link Loss Return (LLR)
The fiber ports on the “twister” have been designed with Link Loss Return function-
ality for troubleshooting remote connections. When LLR is enabled*, the port’s
transmitter (TX) shuts down if its receiver (RX) fails to detect a valid receive link.
LLR should only be enabled on one end of a cable and is typically enabled on either
the unmanaged or remote device. LLR works in conjunction with LLCF and CLCF.
The diagram below shows a typical network configuration with good link status
using two “twister” units for remote connectivity. Note that LLR and LLCF are
enabled as indicated in the diagram.
Management Switch/Hub
Station w/SNMP
“twister”
Switch/Hub Remote
w/SNMP Station
“twister”
B
A
LLCF is ON
LLR2 is ON
LLR1 is OFF
LLCF is ON
LLR2 is ON
LLR1 is OFF
Remote
Cable
Port 2 Port 1
Port 2 Port 1
LED lit = established link
LED unlit = no link
Example: If one of the optical conductors breaks (as shown in the diagram box
below), “twister” B, with LLR2 enabled, will return a no-link condition to its link
partner, “twister” A. On the fiber-to-fiber models with LLCF also enabled on both
units, the no-link condition is carried forward to the switch/hub where a trap is
generated to the management station. The network administrator can then determine
the source of the loss.
Management
Station
Switch/Hub
w/SNMP
Switch/Hub Remote
w/SNMP Station
“twister”
“twister”
A
B
LLCF is ON
LLR2 is ON
LLR1 is OFF
LLCF is ON
LLR2 is ON
LLR1 is OFF
Broken
Conductor
Port 1
Link Loss Carried Forward
Port 2
Link Loss Carried Forward
Link Loss Returned
LED lit = established link
LED unlit = no link
IMPORTANT: LLR must not be active on both ends of a configuration. If it is, the
link can never be established.
*Units are shipped with LLR disabled (OFF). On the copper-to-fiber boards, LLR is always enabled on the copper port and
cannot be disabled.
12
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Link Loss Carry Forward (LLCF)
The fiber-to-fiber “twister” units incorporate LLCF functionality to assist in trouble-
shooting a remote connection. When LLCF is enabled*, the ports do not transmit link
signals until they receive link signals from the opposite port. When a lost link signal
is returned to an unmanaged “twister” unit, that lost link must then be carried
forward to a managed device (switch/hub) for trap generation. LLCF works in
conjunction with LLR.
The diagram below shows a typical network configuration with good link status
using two fiber-to-fiber “twister” units for remote connectivity. Note that LLCF is
enabled as indicated in the diagram.
Management Switch/Hub
Station w/SNMP
Switch/Hub Management
w/SNMP Station
“twister”
“twister”
LLCF is ON
LLCF is ON
Remote
Cable
LED lit = established link
LED unlit = no link
If a connection breaks, the “twister” units will carry that link loss forward to the
switch/hub which generates a trap to the management station. The administrator can
then determine the source of the problem.
Management Switch/Hub
Station w/SNMP
Switch/Hub Management
w/SNMP Station
“twister”
“twister”
LLCF is ON
LLCF is ON
Broken
Remote
Cable
Link Loss Carried Forward
Link Loss Carried Forward
LED lit = established link
LED unlit = no link
Management Switch/Hub
Station w/SNMP
Switch/Hub Management
w/SNMP Station
“twister”
“twister”
LLCF is ON
LLCF is ON
Remote
Cable
Broken
Cable
Link Loss Carried Forward
LED unlit = no link
LED lit = established link
*Units are shipped with LLCF disabled (DOWN). On the fiber-to-fiber converters (2151-AD-, 2125-xx- and 2135-34-01), LLCF is
always enabled and cannot be disabled.
Gigabit “twister” and SONET “twister”
13
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Copper Loss Carry Forward (CLCF)
The copper-to-fiber “twister” incorporates CLCF for identifying a lost copper
connection. When CLCF is enabled*, the fiber port’s transmitter shuts down if the
copper port stops receiving link pulses. However, the copper port continually
transmits link signals regardless of whether or not the fiber port detects link.
The diagram below shows a typical network configuration with good link status
using two copper-to-fiber “twister” units for remote connectivity. Note that CLCF is
enabled as indicated.
Management Switch/Hub
Station w/SNMP
Switch/Hub Management
w/SNMP Station
"twister"
"twister"
CLCF is ON
CLCF is ON
Fiber
Cable
Copper
Cable
Copper
Cable
Port
1
Port Port
Port
2
2
1
LED lit = established link
LED unlit = no link
If a copper connection breaks, the “twister” will carry that link loss forward.
Management Switch/Hub
Station w/SNMP
Switch/Hub Management
w/SNMP Station
"twister"
"twister"
CLCF is ON
CLCF is ON
Broken
Copper
Cable
Copper Loss Carried Forward
LED unlit = no link
LED lit = established link
Loss of link at the fiber port is not propagated, as shown in the example below.
Management Switch/Hub
Station w/SNMP
Switch/Hub Management
w/SNMP Station
"twister"
"twister"
LLR2 is OFF
Broken
Fiber
Cable
LED lit = established link
LED unlit = no link
*Units are shipped with CLCF disabled. CLCF is not applicable to fiber-to-fiber models.
14
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Topology Solutions
Enterprise Switch
Servers
Enterprise
“twister”
Switch
“twister”
singlemode F/O
“twister”
singlemode F/O
Switch
“twister”
singlemode F/O
Multimode F/O Links
Singlemode F/O Links
Technical Specifications
Twisted-Pair Interface
Connector _____________________________________________________ RJ-45
Impedance_________________________________________________ 50Ω typical
Signal Level Output (differential) ____________________________ 0.95 to 1.05V
Supported Link Length ____________________________________________ 100m
Cable Type ___________________________________________ Category 5e UTP
Gigabit Ethernet (1000Base-T) Crossover Pin Layout
Plug A
Plug B
Conductor
Color Code
BI_DA+ white/orange
Pin
#
Conductor Pin
Signal
Signal
Color Code
white/green
green
#
1
2
3
4
5
6
7
8
BI_DA+
BI_DA-
1
2
3
4
5
6
7
8
BI_DA-
BI_DB+
BI_DC+
BI_DC-
BI_DB-
BI_DD+
BI_DD-
orange
white/green
white/blue
brown
BI_DB+ white/orange
BI_DC+
BI_DC-
BI_DB-
BI_DD+
BI_DD-
blue
white/blue
orange
green
white/brown
brown
blue
white/blue
Gigabit “twister” and SONET “twister”
15
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Fiber Optic Interface
Cable
Size
Core/
Clad
RX
Input
Power Power
(min) (sat)
RX
Input
TX
TX
Fiber Wave
Model
Cable
Output Output Power
Power
(min)
Type Length Length
Power Budget*
(max)
2km
50/
125µm
-30dBm -14dBm -23.5dBm -14dBm 6.5dBm
-30dBm -14dBm -20dBm -14dBm 10dBm
(rated)
MM 1310nm
2km
2125-34
2125-37
62.5/
125µm
(rated)
15km
(rated,
2125-34
SM 1310nm based on 9/125µm -35dBm -8dBm -15dBm -8dBm 20dBm
power
budget)
SM
(LH)
40km
(rated)
2125-37
2135-34
2135-34
1310nm
9/125µm -35dBm 0dBm
50/
-5dBm
0dBm
30dBm
500m
(rated)
-26dBm -14dBm -22.5dBm -14dBm 3.5dBm
125µm
MM 1310nm
SM 1310nm
500m
(rated)
62.5/
125µm
-20dBm
(typical)
-26dBm -14dBm
-14dBm 6dBm
15km
(rated)
9/125µm -28dBm -7dBm -15dBm -8dBm 13dBm
2151-AD
2152-AA
2152-AD
2152-AF
2152-A7
2152-AJ
2152-1A
2152-1K
62.5/
220m
500m
-17dBm -3dBm -9.5dBm -4dBm 7.5dBm
125µm
MM
850nm
(SX)
50/
-17dBm -3dBm -9.5dBm -4dBm 7.5dBm
125µm
2151-AD
2152-AD
2152-DD
2152-DF
2152-D7
2152-DJ
2152-1D
2152-1M
62.5/
125µm**
550m
550m
-20dBm -3dBm -11.5dBm -3dBm 8.5dBm
SM
50/
125µm**
1310nm
(LX)
-20dBm -3dBm -11.5dBm -3dBm 8.5dBm
10km 9/125µm -20dBm -3dBm -9.5dBm -3dBm 10.5dBm
2152-1F
2152-AF
2152-DF
SM
1310nm
(MR)
25km 9/125µm -21dBm -3dBm
40km 9/125µm -21dBm -3dBm
-4dBm
-4dBm
+1dBm 17dBm
+1dBm 17dBm
2152-A7
2152-D7
2152-77
2152-17
SM
1550nm
(LH)
2152-AJ
2152-DJ
2152-JJ
2152-1J
SM
1550nm
(EX)
70km 9/125µm -23dBm -3dBm
-3dBm
+2dBm 20dBm
* Power Budget = [TX Output Power (min)] — [RX Input Power (min)]
** Using multimode cable with a singlemode transducer.
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BWDM Interface
Connector ________________________________________________________ SC
Supported Link Length ________________________________________up to 20km
Cable Type _______________________________________________ 9/125µm F/O
Output Power _________________________________________ -9 dBm to -3 dBm
RX Input Sensitivity ___________________________________ -20 dBm minimum
Wavelength (2152-1X-01, 2152-AX-01)
Transmitter _______________________________________________ 1550 nm
Receiver__________________________________________________ 1310 nm
Wavelength (2152-1Y-01, 2152-AY-01)
Transmitter _______________________________________________ 1310 nm
Receiver__________________________________________________ 1550 nm
Data Rate
Data Rate ______________________________________ 1Gbps (Gigabit Ethernet)
________________ 155Mbps (OC-3/STM-1), 622Mbps (OC-12/STM-4)
Power Supply
Input ___________________________________________ 100-240V AC 50-60 Hz
Output _________________________________________________ +5V DC @ 2 A
Environmental
Operating Temperature ________________________________________ 0° to 55° C
Storage Temperature ________________________________________ -25° to 70° C
Relative Humidity ______________________________5% to 95% non-condensing
Physical Case _____________________________ Fully enclosed metal construction
Dimensions ___________________________________ 4.83" L x 3.26" W x 1.71" H
____________________________________ 12.3 cm x 8.3 cm x 4.3 cm
Weight (including power supply) ______________________________ 3 lbs, 1.36 kg
Gigabit “twister” and SONET “twister”
17
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Product Safety, EMC and Compliance Statements
This equipment complies with the following requirements:
• UL
• CSA
• EN60950 (safety)
• FCC Part 15, Class A
• EN55022 Class A (emissions)
• DOC Class A (emissions)
• EN55024: 1998 (immunity)
• IEC 825-1 Classification
• Class 1 Laser Product
This product shall be handled, stored and disposed of in accordance with all govern-
ing and applicable safety and environmental regulatory agency requirements.
The following FCC and Industry Canada compliance information is applicable to
North American customers only.
USA FCC Radio Frequency Interference Statement
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 interfer-
ence in which case the user will be required to correct the interference at his own
expense.
Caution: Changes or modifications to this equipment not expressly approved by the
party responsible for compliance could void the user’s authority to operate the
equipment.
Canadian Radio Frequency Interference Statement
This Class A digital apparatus meets all requirements of the Canadian Interference-
Causing Equipment Regulations.
Cet appareil numérique de la classe A respecte toutes les exigences du Réglement sur
le matériel brouilleur du Canada.
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User Guide
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Warranty and Servicing
Three-Year Warranty for the Metrobility “twister”
Metrobility Optical Systems, Inc. warrants that every “twister” product will be free
from defects in material and workmanship for a period of THREE YEARS. This
warranty covers the original user only and is not transferable. Should the unit fail at
any time during this warranty period, Metrobility will, at its sole discretion, replace,
repair, or refund the purchase price of the product. This warranty is limited to defects
in workmanship and materials and does not cover damage from accident, acts of
God, neglect, contamination, misuse or abnormal conditions of operation or han-
dling, including overvoltage failures caused by use outside of the product’s specified
rating, or normal wear and tear of mechanical components.
To establish original ownership and provide date of purchase, complete and return
product was not purchased directly from Metrobility, please provide source, invoice
number and date of purchase.
To return a defective product for warranty coverage, contact Metrobility Customer
Service for a return materials authorization (RMA) number. Send the defective
product postage and insurance prepaid to the address provided to you by the Metro-
bility Technical Support Representative. Failure to properly protect the product
during shipping may void this warranty. The Metrobility RMA number must be
clearly on the outside of the carton to ensure its acceptance.
Metrobility will pay return transportation for product repaired or replaced in-
warranty. Before making any repair not covered by the warranty, Metrobility will
estimate cost and obtain authorization, then invoice for repair and return transporta-
tion. Metrobility reserves the right to charge for all testing and shipping costs
incurred, if test results determine that the unit is without defect.
This warranty constitutes the buyer’s sole remedy. No other warranties, such as
fitness for a particular purpose, are expressed or implied. Under no circumstances
will Metrobility be liable for any damages incurred by the use of this product
including, but not limited to, lost profits, lost savings, and incidental or consequential
damages arising from the use of, or inability to use, this product. Authorized resellers
are not authorized to extend any other warranty on Metrobility’s behalf.
Gigabit “twister” and SONET “twister”
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Product Manuals
The most recent version of this manual is available online at
Product Registration
To register your product, go to
25 Manchester Street, Merrimack, NH 03087
tel: 1.603.880.1833 • fax: 1.603.594.2887
5660-2151AD-01 J
2/04
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