ADC is a registered trademark of ADC Telecommunications, Inc. No right, license, or
interest to such trademarks is granted hereunder, and you agree that no such right,
license, or interest shall be asserted by you with respect to such trademark.
Other product names mentioned in this practice are used for identification purposes
only and may be trademarks or registered trademarks of their respective companies.
Disclaimer of Liability
Informationcontained in thisdocumentis company privatetoADC DSL Systems,Inc.,
and shall not be modified, used, copied, reproduced or disclosed in whole or in part
without the written consent of ADC.
Contents herein are current as of the date of publication. ADC reserves the right to
change the contents without prior notice. In no event shall ADC be liable for any
damages resulting from loss of data, loss of use, or loss of profits, and ADC further
disclaims any and all liability for indirect, incidental, special, consequential or other
similar damages. This disclaimer of liability applies to all products, publications and
services during and after the warranty period.
similar damages. This disclaimer of liability applies to all products, publications and
services during and after the warranty period.
iiJanuary 3, 2002ThinMux Chassis
LTPH-UM-1088-02, Issue 2Using This Manual
USING THIS MANUAL
The following conventions are used in this manual:
•Monospace type indicates screen text.
•Keys you press are indicated by small icons such asor. Key
YENTER
combinations to be pressed simultaneously are indicated with a plus sign
as follows:+.
CTRLESC
•Items you select are in bold.
Three types of messages, identified by icons, appear in text.
Notes contain information about special circumstances.
Cautions indicate the possibility o f personal injury or
equipment damage.
The Electrostatic Discharge (ESD) symbol indicates that a
deviceorassembly issusceptibletodamage fromelectrostatic
discharge.
UNPACK AND INSPECT YOUR SHIPMENT
Upon receipt of the equipment:
•Unpack each container and inspect the contents for signs of damage. If
theequipmenthasbeendamagedin transit, immediately report the extent
of damage to the transportation company and to ADC. Order
replacement equipment, if necessary.
•Check the packing list to ensure complete and accurate shipment of each
listed item. If the shipment is short or irregular, contact ADC as
described in “Appendix C - Product Support” on page 19.Ifyoumust
store the equipment for a prolonged period, store the equipment in its
original container.
ThinMux ChassisJan uary 3, 2002iii
Safety Warnings and NoticesLTPH-UM-1088-02, Issue 2
SAFETY WARNINGS AND NOTICES
The ThinMux chassis DC power supply feeds must be
connectedtoeither(1) -48 Vdc Safety ExtraLowVoltage(SELV)
sources or (2) -48 Vdc sources that are electrically isolated
from the AC sector and reliably connected to earth. The
source’s fault current capacity shall be lower than 50A, or an
appropriate overcurrent protection rated 5A, must be provided
on each -48 Vdc conductor. The overcurrent protection can
also be used as a cutoff switch if another disconnect device is
not installed.
This equipment may be provided with a module that
incorporates laser source(s). Refer to the module’s
documentation for detailed safety information.
The telemetry I/O must be connected to either a SELV source or
an ELV source that is electrically isolated from the AC sector
and reliably connected to earth.
The metallic telecommunication interface should not leave the
building premises unless connected to telecommunication
devices providing primary and secondary protection.
The ADC®ThinMux™chassis houses the ThinMux DS3 or ThinMux STS-1
multiplexer and fits in a Central Office (CO) rack. Each ty pe of multiplexer
provides support for a minimum of 28 T1 (or 21 E1) lines from the chassis.
The chassis also provides two DS3 interfaces for external equipment. It
features a forced-air cooling unit, Ethernet port, rear craft port, craft ports on
the multiplexer front panels, and fiber management guides. Offering a 1+1
protected multiplexing function on the network and client side, the ThinMux
chassis is the industry’s most compact multiplexer platform.
FEATURES
•The ThinMux chassis allows for the following shelf configurations:
–STS-1 to 28 T1 (using ThinMux multiplexer HXU-359)
–DS3 to 28 T1 or 21 E1 lines (using ThinMux multiplexer HXU-360)
•Dual multiplexer support for 1+1 protection of network and customer
interfaces
•Migration path and investment protection on installed equipment
•Concentration of many low-speed access network interfaces to a single
Depending on your network interface requirements, several cabling options
are available. Select the instructions that apply to your configuration as
shown in “Installing DS 3 or STS-1 Interface Cables” on page 11.
ThinMux ChassisJan uary 3, 20021
OverviewLTPH-UM-1088-02, Issue 2
BACKPLANE
RJ-45 Ethernet
10/100BASE-T
connector
Chassis ground
DS3 or STS-1
connectors
Line 2
Tx
32-pair (female) connectors -T1, E1
Line 1
Rx Tx Rx
(left Rx, right Tx)
ESD strap input
-48 Vdc battery supply
screw connectors
(common access panel)
(visual, audible, and discrete
DB-9 craft port
DB-9 craft port
connector
connector
CRIT
CRIT
Test
BitsAlarm
VIS
AUD
Access
TTIP
B-
TRING
B+
RTIP
A-
RRING
A+
RTN B]
NO NO
FE
-48 B
COM COM
MIN
RTN A
NC NC
MAJ
-48 A
Frame
Frame
CRIT
GND
GND
FGND
COM
Craft
RS-232
BITS A and B, test access
alarm wire-wrap pins)
Figure 1.Backplane Interfaces (rear view)
The ThinMux chassis provides a compact 1U platform for the ThinMux
family of multiplexers with the following interconnects:
•One 10/100BASE-T Ethernet (IEEE 802.3)
•Two 64-pin female r ecept acle connectors for T1/E1 transmit/receive,
chassis-shielded
•Four 75
Ω BNC connectors for DS3/STS-1 transmit/receive
•Four wire-wrap 0.045-inch pins for Building Integrated Timing Supply
(BITS) A and B
•Four wire-wrap 0.045-inch pins for T1 or E1 test access, transmit/receive
•Four wire-wrap 0.045-inch pins for Visible (VIS) and Audible (AUD)
alarms (dry relay contacts) which are normally open (NO) discrete
alarms
•Five wire-wrap 0.045-inch pins for discrete alarms (solid sate relay
contacts): Far End, Minor, Major, and Critical
•Five screw connectors for -48V dual power
•One DB-9 connector for RS-232 communication
2January 3, 2002ThinMux Chassis
LTPH-UM-1088-02, Issue 2External Interfaces
EXTERNAL INTERFACES
The ThinMux chassis provides the following interfaces:
•T1/E1
•T1/E1 Test
•RS-232
•10/100BASE-T Ethernet
•Discrete alarms
T1/E1 INTERFACE
There are two female 32-pair connectors to access 28 T1 (or 21 E1) lines for
intra-building connection; no protection is provided on the backplane. One
connector is for transmission, the other is for reception.Each port is routed to
both multiplexers (A and B) for transmit and receive. See “Appendix A - Pin
Assignments” on page 14 for interface pinout description.
A shielded 32-pair cable should be used and grounded at
eithertheframeorchassis. The groundconnectionisdoneat
one end of the cable only to avoid ground loops.
T1/E1 TEST INTERFACE
The four-wire test interface can be routed to any of the 28 T1 (or 21 E1)
low-speed T1/E1 ports. It can be used to monitor the line or to look toward
the network or subscriber drop. The four signals are accessed through
four 0.045-inch wire-wrap pins. (For more information about the wire-wrap
pins, see “Connect Test Access” on page 9.)
ThinMux ChassisJan uary 3, 20023
External InterfacesLTPH-UM-1088-02, Issue 2
RS-232 CRAFT INTERFACE
Communication with the ThinMux STS-1 and ThinMux DS3 central
processors occur through a standard grounded DB-9 connector (RS-232 Data
Communication Equipment interface).
Signals are routed to both multiplexers, and the transmitter of the inactive
multiplexer remains in a tristate mode. Pin 5 is the digital ground of all digital
components (both multiplexers). See Table 3 on page 17 for interface pinout
description.
10/100BASE-T ETHERNET INTERFACE
Communication with the multiplexer (STS-1 or DS3) central processors
occurs through the standard grounded RJ-45 10/100BASE-T interface for
metallic chassis. Similar to the RS-232 interface, signals are routed to both
multiplexers; the transmitter of the inactive multiplexer remains in a tristate
mode. S ee Table 4 on page 17 for interface pinout description.
DISCRETE ALARMS
In addition to the various interfaces supplied by the ThinMux chassis, the
common access panel (see Figure4onpage8) provides access for discrete
alarm wi ring.
The discrete alarms connection is provided by 0.045-inch wire-wrap pins
located on the rear of the chassis (see Figure 1 on page 2). The signals are
routed to the multiplexers, where the logic functions are performed. Critical
VIS and AUD alarms comprise dry contacts for telemetry applications. The
alarms have an independent common connection (serial COM port) to relays;
normally open (NO) is provided. Current is limited to 0.5A when a maximum
temperature rise of 20°C on traces is desired (as per MIL-STD-275C).
When using a legacy HXU-358 multiplexer, the CRIT VIS, CRIT AUD, and
Alarm pins must be left unconnected. For all other multiplex ers, these pins
may be used as needed.
Other alarms (FE, MIN, MAJ, and CRIT) share the same COM, and only
normally open contact is provided as shown in Figure4onpage8. Contact
closure is made using a solid-state relay photo Metal-Oxide Semiconductor
4January 3, 2002ThinMux Chassis
LTPH-UM-1088-02, Issue 2Installation
Field-Effect Transistor (MOSFET). When set to ON, resistance is 35Ω at
85°C (worst case). The switched current must be l ess than 80 mA, and the
switched voltage must be less than 135V. If a coil relay or other inductive
load is used, a protection diode must be connected between the alarm signal
and the COM signal to prevent damage to the solid state relay. ADC does not
provide the diode with the ThinMux chassis. The diode must be purchased
separately. Use Motorola diode part number 1N4004 or equivalent.
BATTERY SUPPLY
The battery supply terminals are located on the rear of the chassis under the
common access panel (see Figure 1 on page 2). Five AWG 16 wires connect
the Return B, -48B, Return A, -48A, and Frame Ground to the power source.
To wire power A and B inputs, attach A and B power leads from the fuse
panel or office battery to the appropriate screw connector on the terminal
block. For more information, refer to “Connecting Power” on page 10.
INSTALLATION
Before installing the ThinMux Chassis, visually check its
packaging to ensure that it has sustained no shipping
damage. Immediately report any damage to the shipping
agent. See “Appendix C - Product Support” on page 19.
ThinMux ChassisJan uary 3, 20025
InstallationLTPH-UM-1088-02, Issue 2
MOUNTING THE CHASSIS
Three 8-32 x / screws
Two 6-32 x / screws
1
4
ESD input bracket
Two 12-24 x / screws
5
16
CO rack
Mounting brackets
1
2
Two 12-24 x / screws
1
2
Three 8-32 x / screws
5
16
Figure 2.ThinMux Chassis in a CO Rack
1Install a mounting bracket on each side of the ThinMux chassis using the
5
three screws provided for each bracket (8-32 x
/16 screws) as shown in
Figure 2. (Mounting brackets and screws are contained in the installation
kit.)
Two sets of mounting brackets are supplied to fit 19-inch or
23-inch racks with standard EIA-hole spacing (1/2 inch).
Optional brackets with WECO-hole spacing (1 inch) are
available (ACE-MK1).
2Install ESD input bracket on front left side of the chassis.
3Align the chassis mounting bracket holes with the rack’s vertical
mounting holes. Mount the chassis in the rack. Install two
1
12-24 x
6January 3, 2002ThinMux Chassis
/2screws in each bracket and secure the chassis to the rack.
LTPH-UM-1088-02, Issue 2Installation
INSTALLING THE FAN MODULE (FB1)
Fan module
ThinMux chassis
Figure 3.Installing the Fan Module (FB1)
1Unwrap the enclosed fan module.
2Align the fan with the slot located on the left side of the chassis and slide
the fan in as shown in Figure 3.
3Insert the fan module until the connector is firmly seated in the
backplane.
ThinMux ChassisJan uary 3, 20027
InstallationLTPH-UM-1088-02, Issue 2
WIRING THE COMMON ACCESS PANEL
1Unscrew the common accesspanelhold-downlugsand remove the cover
2Determine if you require a BITS timing source connection to the chassis;
if so, the chassis must first have a line termination prior to chassis
connection.
The BITS concept is used for interoffice synchronization distribution.
Each line source, Bits A and Bits B, must be terminated. ADC provides
this terminat ion through external termination blocks (product catalog
TERM-100) placed on wire-wrap terminal posts on the rear of the
ThinMux chassis as shown in Figure 5 on page 9.
8January 3, 2002ThinMux Chassis
LTPH-UM-1088-02, Issue 2Installation
CRIT
CRIT
Test
BitsAlarm
VIS
AUD
Access
RTN B]
NO NO
TTIP
FE
Side view of
termination block*
Termination blocks
(TERM-100 part number 1178533)
Wire-wrap pin
Terminator PCB
Terminator resistor
Chassis backplane
B-
B+
A-
A+
B-
B+
-48 B
TRING
COM COM
MIN
RTN A
NC NC
MAJ
RTIP
-48 A
Frame
Frame
RRING
CRIT
GND
GND
FGND
COM
Craft
RS-232
JP7
JP12
A-
A+
*Install the 100 termination block with the
Ω
resistor facing towards the backplane.
Figure 5.Installing Line Terminators
3Install the BITS terminating blocks (catalog number TERM-100),
provided in the installation kit, between the Bits A+, A- and B+, B- posts.
4Connect Bits A and Bits B posts to your Synchronous Optical Network
(SONET) cl ock synchronization source (SONET minimum clock or
better). Use a frame ground post as a shield, if needed.
Connect Test Access
5Connect the Test Access TTIP, TRING, RTIP, RING, and Frame GND
posts to the external test head.
ThinMux ChassisJan uary 3, 20029
InstallationLTPH-UM-1088-02, Issue 2
Connect Alarms
6Connect the alarm relay wires from the CO alarm center to the posts of
the Visible Alarm (CRIT. VIS—NO and COM), Audible Alarm (CRIT.
AUD—NO and COM) and Alarm (FE, MIN, MAJ, CRIT, and COM).
Follow the CO site instructions for connecting alarm relays. The visible
and audible alarm relays do not have an NC (normally closed) position.
7Connect a 16 AWG chassis ground cable to the ground (GND) post.
CONNECTING POWER
The fuse rating for the ThinMux chassis is 2A.
RTN B
-48 B
RTN A
-48 A
FGND
Figure 6.Battery Supply Connector (rear view)
1Connect 16 AWG cables to the -48V A, B, and RTN terminals.
2Connect the other end of the cables to CO battery supply and RTN
terminals.
3Apply power and check the voltage.
4Reinstall the common access panel and screw in the hold-down lugs.
10January 3, 2002ThinMux Chassis
LTPH-UM-1088-02, Issue 2Installation
The ThinMux chassis DC power supply feeds must be
connected to either (1) -48 Vdc Safety Extra Low Voltage
(SELV) sources or (2) -48 Vdc sources that are electrically
isolated from the AC sector and reliably connected to earth.
The source’s fault current capacity shall be lower than 50A,
or an appropriate overcurrent protection, rated 5A, must be
provided on each -48 Vdc conductor. The overcurrent
protection can also be used as a cutoff switch if another
disconnect device is not installed.
The ThinMux chassis is configured for redundant power.
The A and B battery sources are independently connected
to each multiplexer. In the event of a loss of power from
one of the sources, an alarm is reported by the active
multiplexer. Power is continually supplied to both slots in
the chassis.
INSTALLING DS3 OR STS-1 INTERFACE CABLES
After mounting the chassis to the CO rack, select the appropriate interface for
cable installation. (For information regarding multiplexer configuration and
operation, refer to the specific multiplexer user manual.)
Wheninstallingcomponents, wearanantistatic wrist strap.
Avoid touching components on the circuit board.
ThinMux ChassisJan uary 3, 200211
InstallationLTPH-UM-1088-02, Issue 2
ESD strap input
Chassis ground
Ethernet
10/100BASE-T
DSX-1 input (receive)
from cross-connect
Line 2
Tx
Line 1
Rx TxRx
DS3 or STS-1 (In)
Common access panel
BitsAlarm
Alarms, p
and frame ground
CRIT
CRIT
Test
VIS
AUD
Access
NO NO
TTIP
B-
TRING
COM COM
B+
NC NC
RTIP
A-
Frame
RRING
A+
GND
Craft port
RTN B]
FE
-48 B
MIN
RTN A
MAJ
-48 A
Frame
CRIT
GND
FGND
COM
Craft
RS-232
ower,
DS3 or STS-1 (Out)
DSX-1 output (transmit)
to cross-connect
Figure 7.DS3 or STS-1 Shelf Configuration
1Connect the 32-pair shielded cable, with amphenol male connector
coming from the cross-connect, to the DSX-1 input (Rx) as shown in
Figure 7.
2Connect the 32-pair shielded cable, with amphenol male connector going
to the cross-connect, to the DSX-1 output (Tx).
The metallic telecommunicationinterfaceshould not be routed
from the building premises unless connected to
telecommunication devices providing primary and secondary
protection.
3Connect the DS3/STS-1 coaxial cable for data coming from the
DS3/STS-1 network to Line 1 Rx.
12January 3, 2002ThinMux Chassis
LTPH-UM-1088-02, Issue 2Installation
4Connect the DS3/STS-1 coaxial cable for data going to the DS3/STS-1
network to Line 1 Tx.
5Connect the Ethernet port to a LAN, if required.
6Connect a VT100 maintenance terminal to the craft port, if required.
ThinMux ChassisJan uary 3, 200213
Appendix A - Pin AssignmentsLTPH-UM-1088-02, Issue 2
APPENDIX A-PIN ASSIGNMENTS
T1/E1 I
Figure 8 shows the male T1/E1 amphenol cable connector connecting to the
female T1/E1 connector located on the backplane of the ThinMux chassis.
Table 1 on page 14 and Table 2 on page 16 describe the pin assignments for
transmit and receive.
NTERFACE
Figure 8.Male Cable C onnector Into Female Backplane Connector
Appendix B - SpecificationsLTPH-UM-1088-02, Issue 2
APPENDIX B-SPECIFICATIONS
Power
Input Voltage Range-60 Vdc to -42.5 Vdc
Fusing2A
Environmental
Operating temperature-40°F to +149°F (-40°C to +65°C)
Operating humidity10% to 95%, non-condensing
Dimensions
Height:1.75 in.
Width:17.35 in.
Depth:12.0 in.
Weight:< 10 lbs. (fully configured)
Network InterfacesDS3 and STS-1 (using a ThinMux multiplexer)
Rear Panel Interfaces
DS3/STS-14 BNC, male
DS1/E132-pair shielded cable with amphenol male connector
CraftDB-9 female
Ethernet/TelnetRJ-45
Alarm ContactsWire-wrap pins, FE, MIN, MAJ, CRIT, COM (NO)
Audible AlarmWire-wrap pins, COM (NO)
Visible AlarmWire-wrap pins, COM (NO)
Test AccessWire-wrap pins, TTIP, TRING, RTIP, RRING, Frame GND
PowerDual screw terminals
Bits A and BWire-wrap pins A+, A-, B+, B-, shield, RtipA, RringA, RtipB,
18January 3, 2002ThinMux Chassis
RringB, shield
LTPH-UM-1088-02, Issue 2Appendix C - Product Support
APPENDIX C-PRODUCT SUPPORT
ADC C u stomer Service Group provides expert pre-sales and post-sales
support and training for all its products.
Technical support is available 24 hours a day, 7 days a week by contacting
the ADC Technical Assistance Center (TAC).
Sales Assistance
800.366.3891 ext. 73000 (USA and
Canada) or 952.917.3000
Fax: 952.917.3237
Systems Integration
800.366.3891, ext. 73000 (USA and
Canada) or 952.917.3000
BIA Technical Assistance Center
800.638.0031 or 714.730.3222
Fax: 714.730.2400
Email: wsd_support@adc.com
Online Technical Support
Online Technical Publications
Product Return Department
800.366.3891 ext. 73748 (USA and
Canada) or 952.917.3748
Fax: 952.917.3237
Email: repair&return@adc.com
• Quotation Proposals
• Ordering and Delivery
• General Product Information
• Complete Solutions (from concept to
installation)
• Network Design and Integration Testing
• System Turn-Up and Testing
• Network Monitoring (upstream or downstream)
• Power Monitoring and Remote Surveillance
• Service/Maintenance Agreements
• Systems Operation
• Technical Information
• System/Network Configuration
• Product Specification and Application
• Training (product-specific)
• Installation and Operation Assistance
• Troubleshooting and Repair/Field Assistance
• www.adc.com/Knowledge_Base/index.jsp
• www.adc.com/library1/
• ADC Return Material Authorization (RMA)
number and instructions must be obtained
before returning products.
All 800 lines are toll-free in the USA and Canada.
ThinMux ChassisJan uary 3, 200219
Appendix D - AbbreviationsLTPH-UM-1088-02, Issue 2
APPENDIX D-ABBREVIATIONS
A
AWG: American Wire Gauge
B
BITS: Building Integrated Timing
Supply
BNC: Bayonet-Locking Connector
C
CO: Central Office
COM: Communications Port on a PC
(serial port)
CRIT: Critical Alarm
D
DCE: Data Communication Equipment
DS3: Digital Signal, Level 3
E
M
MAJ: Major Alarm
MIN: Minor Alarm
MOSFET: Metal-Oxide Semiconductor
Field-Effect Transistor
N
NO: Normally Open
R
RX: Receive
S
SELV: Safety Extra Low Voltage
STS: Synchronous Transport Signal,
Level 1
T
TX: Transmit
ELV: Extra Low Voltage
ESD: Electrostatic Discharge
F
FE: Far End
L
LAN: Local Area Network
20January 3, 2002ThinMux Chassis
CERTIFICATION AND WARRANTY
FCC C LASS ACOMPLIANCE
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.
Operationofthis equipment inaresidentialarea is likelytocause harmful interference
in which case the user will be required to correct the interference at his own expense.
LIMITED WARRANTY
ADC DSL Systems, Incorporated (“ADC”) warrants that, for a period of sixty (60)
months fromthe date of shipment,thehardwareportion of its products will be free of
material defects and faulty workmanship under normal use. ADC's obligation, under
this warranty,islimitedtoreplacingor repairing, at ADC's option, any such hardware
productwhich isreturnedduringthe60-monthwarrantyperiodperADC'sinstructions
and which product is confirmed by ADC not to comply with the foregoing warranty.
ADC warrants that, for a period of 90 days from the date of purchase, the software
furnished with its products will operate substantially in accordance with the ADC
published specifications and documentation for such software. ADC’s entire liability
for software that does not comply with the foregoing warranty and is reported to ADC
during the 90-day warranty period is, at ADC’s option, either (a) return of the price
paid or (b) repair or replace of the software. ADC also warrants that, for a period of
thirty (30) days from the date of purchase, the media on which software is stored will
be free from material defects under normal use. ADC will replace defective media at
no charge if it is returned to ADC during the 30-day warranty period along with proof
ofthedateofshipment.
The transportation charges for shipment of returned products to ADC will be prepaid
by the Buyer. ADC will pay transportation charges for shipment of replacement
products to Buyer, unless no trouble is found (NTF), in which case the Buyer will pay
transportation charges.
ADC may use reconditioned parts for such repair or replacement. This warranty doesnot apply to any productwhich has been repaired,workedupon, or altered by persons
not authorized by ADC or in ADC's sole judgment has been subjected to misuse,
accident, fire or other casualty, or operation beyond its design range.
Repaired products have a 90-day warranty, or until the end of the original warranty
period—whichever period is greater.
ADC DISCLAIMS ALL OTHER WARRANTIES, EITHER EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO IMPLIED WARRANTIES OF
MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE, WITH
RESPECT TO ITS PRODUCTS AND ANY ACCOMPANYING WRITTEN
MATERIALS. FURTHER, ADC DOES NOT WARRANT THAT SOFTWARE
WILL BE FREE FROM BUGS OR THAT ITS USE WILL BE UNINTERRUPTED
OR REGARDING THE USE, OR THE RESULTS OF THE USE, OF THE
SOFTWARE IN TERMS OF CORRECTNESS, ACCURACY, RELIABILITY OR
OTHERWISE.
MODIFICATIONS
Any changes or modifications made to this device that are not expressly approved by
ADC DSL Systems, Inc. voids the user's warranty.
All wiring externaltothe productsshouldfollow the provisions of the current edition
of the National Electrical Code.
SAFETY STANDARDS COMPLIANCE
The ThinMux chassis has been tested and verified to comply with the applicable
sections of the following safety standards:
•GR 63-CORE - Network Equipment-Building System (NEBS) Requirements:
Physical Protection
•GR 1089-CORE - Electromagnetic Compatibility and Electrical Safety Generic
Criteria for Network Telecommunications Equipment
•Bi-national standard, UL-1950/CSA-C22.2 No. 950-95; Safety of Information
Technology Equipment
For technical assistance, refer to “Appendix C - Product Support” on page 19.