NAG SNR-R7204 Assembly instructions

SNR-R7204 Router Hardware Installation
Manual

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Table of Contents
Chapter 1 7204 Router Overview ......................................................................................................................................... 1
1.1 Introduction ............................................................................................................................................................ 1
1.2 Technology Traits................................................................................................................................................... 1
1.3 ardware Performance Index ............................................................................................................................... 1
1.4 Appearance of 7204 Router .................................................................................................................................. 2
1.5 ull ........................................................................................................................................................................ 2
1.6 Ventilation and Cooling System ............................................................................................................................. 2
1.7 RO S Description ................................................................................................................................................. 3
Chapter 2 Installation Preparation ........................................................................................................................................ 4
2.1 Safety Advice ......................................................................................................................................................... 4
2.1.1 Safety Advices for System Installation ...................................................................................................... 4
2.1.2 Safety Advices for Removal ...................................................................................................................... 4
2.1.3 Electricity Security ..................................................................................................................................... 4
2.1.4 Laser Security ........................................................................................................................................... 4
2.2 Requirements for Location Place .......................................................................................................................... 4
2.2.1 Ventilation Requirements .......................................................................................................................... 5
2.2.2 Temperature and umidity ........................................................................................................................ 5
2.2.3 Cleanness Requirements .......................................................................................................................... 5
2.2.4 Power Requirements ................................................................................................................................. 6
2.3 Grounding Requirements for the System .............................................................................................................. 6
2.4 Requirements for System Connection ................................................................................................................... 6
2.4.1 Safe Grounding ......................................................................................................................................... 6
2.4.2 Thunder Grounding ................................................................................................................................... 6
2.4.3 Electromagnetic-Compatible Grounding ................................................................................................... 6
2.5 Installation Tools .................................................................................................................................................... 7
2.6 Requirements for Unpacking & Goods Examination ............................................................................................. 7
Chapter 3 Router Installation ................................................................................................................................................ 8
3.1 Installation Procedure of 7204 Router ................................................................................................................... 8
3.2 Preparation Before Installation .............................................................................................................................. 8
3.3 Installing the Router’s ull ..................................................................................................................................... 8
3.3.1 Installing the ull on the Desk ................................................................................................................... 9
3.3.2 Installing the ull on the Cabinet .............................................................................................................. 9
3.4 Connecting the System and the Ground ............................................................................................................... 9
3.5 Checking After Installation ..................................................................................................................................... 9
3.5.1 Checking the Cabinet ................................................................................................................................ 9
3.5.2 Checking Cable Connection .................................................................................................................... 10
3.5.3 Checking the Power Source .................................................................................................................... 10
3.6 Connecting the Console Port .............................................................................................................................. 10
3.6.1 Connecting the Console Port .................................................................................................................. 10
3.7 Establishing the Configuration Environment ....................................................................................................... 12
3.7.1 Establish the Local Configuration Environment Through the Console Port ............................................ 12
Chapter 4 ardware Fault Analysis .................................................................................................................................... 14

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4.1 Fault Separation .................................................................................................................................................. 14
4.1.1 Power-Related Trouble ........................................................................................................................... 14
4.1.2 Faults Relative with Port, Cable and Connection .................................................................................... 14
4.1.3 Abnormal Troubles of the System ........................................................................................................... 14
4.2 Indicator Description ............................................................................................................................................ 14

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Chapter 1 7204 Router Overview
1.1 Introduction
7204 high-end routers are developed by our company for telecom carriers and
enterprise's core network. Its design is industry-edging, market-oriented and
experience-/technology-blossomy.
7204 hi-end router marks its large capacity, multiservice support, flexible configuration
and strong network environment compatibility. 7204 router has four Gigabit-Ethernet
optical-electrical-multiplexed service channels, one Ethernet 100M debugging port and
one console port.
1.2 Technology Traits
Strong data-processing ability
The hi-performance network processor and the advanced bus technology are
adopted, which makes sure that the router functions well in the hi-speed
network.
High security
The overall firewall technology and the VPN technology secure data
transmission.
Various routing protocols
Supporting multiple routing protocols makes sure of the routing information
redistribution between different routing protocols.
Flow management policy
Multiple queue algorithms are supported, which secures the bandwidth demand
of the key service.
High performance-price ratio
The high performance-price ratio fully secures users’ investment.
Chinese/English website supporting
The Chinese/English online help is supported, which facilitates
domestic/oversea users.
1.3 Hardware Performance Index
Table 1-1 7204 router’s hardware characteristics
Memory
Flash Memory：8M Bytes；
DDR SDRAM：512Mbytes；
QDR SRAM：8M Bytes；
Fixed configuration
Four Ethernet 10/100/1000M ports (SFP and the electric port
mode are provided meanwhile)
The LINK andACT indicators are provided.
One Ethernet 10/100M port (only the electric port is provided)

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The LINK andACT indicators are provided.
One console port without indicator
Specifications 442.5mm×374mm×44mm
Working
temperature/humidity
0℃-40℃; 10%-85%; no condensation
Storage temperature/
humidity
-20℃-65℃; 5%-95%; no condensation
Power
characteristi
cs
AC
power
Input voltage: 100-240V
Input frequency: 47-63Hz
Input current: 1A/230V
Power consumption Up to 60W
1.4 Appearance of 7204 Router
The front template of the 7204 router is shown the following figure:
Figure 1-1 Front template of the 7204 router
The back template of 7204 router is shown in the following figure:
Figure 1-2 Back template of the 7204 router
1.5 Hull
The router’s hull is 19 Inch wide, 1U high, electromagnet compatible and 3C
supportive.
1.6 Ventilation and Cooling System
7204 router runs in a working temperature between 0 and 40℃. The appearance
temperature of the device cannot exceed 50-80% of the highest temperature and the

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reliability demands of the device must be satisfied. Of course, security and
maintenance ability must be considered at the same time.
The cooling system of the device must take the two-side heat cooling design. In some
cases, the fan is needed to cool the heat mandatorily, ensuring the router runs in the
regulated environment.
1.7 ROHS Description

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Chapter 2 Installation Preparation
2.1 Safety Advice
To prevent personnel and devices from harms, read safety advices in the manual
before you install the 7204 router.
The following safety advices do not cover all potential dangers.
2.1.1 SafetyAdvices for System Installation
Keep the hull clean and dustless.
Before dismantling the hull, please shut down all powers and dial out all
power sources and cables.
2.1.2 SafetyAdvices for Removal
Follow the following advices when you move the device:
When you move the device, do not hurt your feet or your waist.
Before moving the device, cut off all power sources and dial out all cables.
When moving the device, do not hold the template, power handle or
ventilation hole. The right operation is to hold the bottom of the
device with two hands.
2.1.3 Electricity Security
Check potential dangers in the working area, such as ungrounded power source,
unreliable power grounding and wet ground.
Before installation, know the location of the emergency power switch indoors. If
trouble occurs, cut off the power.
Try to avoid maintaining the devices alone.
When the power is cut off, check the devices carefully.
Do not put the device in moist environment or let liquid substance into the hull.
2.1.4 Laser Security
When the optical-fiber transceiver works, you should make sure that the port connects
the optical-fiber cable and that the port is stuffed by the anti-dust lid.
Do not watch the laser interface directly.
2.2 Requirements for Location Place
7204 router must be installed indoors. To secure its normal running and expand its
lifespan, the following requirements for the installation place must be satisfied:

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2.2.1 Ventilation Requirements
The ventilation of the device must guarantee a space reservation at the ventilation hole,
enabling the cooling system to works normally. After all types of cables are connected,
you should bind them together to prevent them from stuffing the ventilation hole.
2.2.2 Temperature and Humidity
To guarantee the normal function and lifespan of 7204 router, you should maintain a
certain temperature and humidity in the machine room.
If the temperature and humidity in the machine room is unsuitable for a long time, the
device may get damaged.
In a relatively high humid environment, the insulation material may not insulate
well, or even have current leakage. In some cases, the mechanic performance
of the material and mental parts’ erosion may occur.
In a relatively low humid environment, the insulation slice may be dried, shrink
and easily generate static; hence, the circuits on the device may get damaged.
The higher the temperature is, the higher the danger is. The reliability of the
router, hence, will greatly affected and the aging process of the router will greatly
accelerate.
The router's requirements for temperature and humidity are shown in table 2-1:
Table 2-1 7204 router’s requirements for temperature and humidity
Temperature Relative Humidity
Long-term function Short-term
function
Long-term function Short-term
function
15ºC~30ºC 0ºC~45ºC 40%~65% 10%~90%
The measurement should be taken at 1.5m high and 0.4m ahead of
the front template when the bracket has no shield panes.
The short-term function means that the router cannot continuously
run over 48 hours or 15 days discontinuously each year.
The extremely bad working environment means the temperature
and humidity when trouble occurs in the air-conditioning system.
The router takes five years to restore.
2.2.3 Cleanness Requirements
Dust is a danger for device’s function. If there are lots of dusts in the router’s hull, the
static may be absorbed and therefore the metal pointer may not be well touched,
especially when the indoor humidity is relatively high. The dust volume and particle
diameter in the machine room are shown in table 2-2.
Table 2-2 Dust volume and particle diameter in the machine room
Maximum
diameter (µm) 0.5 1 3 5
Maximum
thickness
(particle/m
3
)
1.4 x 10
5
7 x 10
5
2.4 x 10
5
1.3 x 10
5

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Besides the dust, the device has severe demands for the salt/acid/sulfide percentage
in the air. These vicious substances will accelerate metal’s erosion and the aging
process of some parts. Hence, vicious gases (SO
2
, H
2
S, NO
2,
and CL
2
) must be
prevented from entering the computer room. The details about the average/maximum
vicious gas ratio in the air are shown in table 2-3.
Table 2-3 Average/maximum vicious gas ratio in the air
Gas Average ratio (mg/m) Average ratio (mg/m)
SO
2
0.2 1.5
H
2
S 0.006 0.03
NO
2
0.04 0.15
NH
3
0.05 0.15
CL
2
0.01 0.3
2.2.4 Power Requirements
The following shows the requirements for the AC current:
Input AC voltage: 220V±20%，50Hz±10%
Power: 60W
2.3 Grounding Requirements for the System
The nice grounding system is a solid base for 7204 router to function reliably, and a
prima premise for thunder attack prevention and anti-jamming. Please carefully check
the grounding conditions of the installation site according to the requirements of
grounding regulations, and get the grounding well done according to actual situation.
2.4 Requirements for System Connection
2.4.1 Safe Grounding
The AC-adopted device must be grounded through the yellow-green grounding line, or
the electric shock may occur when the insulation resistance between power source
and hull gets small.
2.4.2 Thunder Grounding
The anti-thunder system is an independent system among facilities, consisting of the
lightning rod, the underground conductor and the connector for the grounding system.
The grounding system is used together with the grounding device for the yellow-green
safety grounding line. The lightning discharge grounding is just for facilities, not for
devices.
2.4.3 Electromagnetic-Compatible Grounding
The groundings which are oriented for electromagnetic compatibility include the
shielded grounding, filter grounding, noise/interruption limitation and level reference.
The grounding resistance must be less than 1Ω.

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2.5 Installation Tools
Table 2-4 Tools and meters
Regular tools Crossed screwdriver, common screwdriver, cables, optical-
fiber cables, bolts and pincer
Specific tools Static-proof tools
7204 router has no accessory toolkit and users need prepare for
these tools.
2.6 Requirements for Unpacking & Goods Examination
The routers are delivered according to the order contract, so the buyer has to unpack
and check the routers according to the order contract.
The inspection must comply with the order contract and the packing list, which is to
check whether the packaging is complete and whether the packing list accords to the
goods.
Note:
1) When you plug or dial out the power line, keep the power line horizontal with the
power socket.
2) When the lifetime of our products ends, handle them according to state laws and
regulations, or send these products to our company for collective processing.

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Chapter 3 Router Installation
Caution:
Only professionals are allowed to install or replace the devices of the router.
3.1 Installation Procedure of 7204 Router
3.2 Preparation Before Installation
Prepare the following things before the router is installed:
Check whether ventilation is nice at the installation site.
Check whether the power source and the air flow at the installation site are
prepared according to corresponding requirements.
Check whether the cables are prepared well for the power source and relative
network.
Check whether the rated power source can be obtained.
3.3 Installing the Router’s Hull
The hull of the router can be installed on the desk or can be fixed to other cabinets.

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Installing the hull on the desk
Installing the hull on the cabinet
3.3.1 Installing the Hull on the Desk
7204 router can be directly put on the smooth and safe desk.
Note:
Do not put heavy things on the top of the router.
3.3.2 Installing the Hull on the Cabinet
The hull of the router is fixed on the cabinet through the brackets.
Note:
The previous example only describes how to install the router’s hull on one side of a
bracket. The installation on the other side of the bracket is same.
After the brackets are installed, install the router on the cabinet. See the following
figure:
3.4 Connecting the System and the Ground
GND of the router must be grounding. To guarantee the grounding of the system, the
GND port must be connected by to the ground by connecting a line through the
grounding column and the summary slot of the bracket.
3.5 Checking After Installation
3.5.1 Checking the Cabinet
Check whether outside power supply matches up with the switchboard of the
cabinet.
After the router is installed, check whether the front/reel cabinet doors can be
closed.
Make sure that the cabinet is so fixed that it cannot be removed or fall down.
Make sure that the router has been installed and fixed well in the cabinet and that
all cables are also fixed on the cabinet.

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3.5.2 Checking Cable Connection
Make sure that the optical-fiber cable and the cable match the ports.
Check whether the cables are bound correctly.
3.5.3 Checking the Power Source
Check whether the power line is well touched and complies with the security
requirements.
Open the switch of the power source and check whether the power module
works normally.
3.6 Connecting the Console Port
7204 router has one console port. Its attributes and usage method are described in this
section.
3.6.1 Connecting the Console Port
Its console port has a rate of 300bps to 115200bps and a standard RJ45 plug and the
parity check is an option for the console port. However, the console port has no
indicator. Before configuring and monitoring the router, you must connect the console
port and the terminal (such as STAR-510G
+
) or PC’s serial port through specific
monitor cable and then run terminal imitation software (Windows super-terminal). The
cable is provided according to the host. The communication parameters of the
terminal serial port can be set to a rate of 9600bps, eight data bits, one stop bit, no
sum check bit and traffic control.
1. Connecting the console port of 7204 router and the computer:
The RJ45 connector of the console port is shown in the following figure. The RJ45 plug
corresponds to the RJ45 socket, whose pins can be aligned from left to right with the
value from 1 to 8.

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Figure 3-1 RJ-45 connector
Definition of the pins of the console port:
No. Name Symbol Remarks
1 Carrier Detecting CD It is used to connect the
Modem.
2 Data receiving RXD Input
3 Data-line device ready DSR It is used to connect the
Modem.
4 Data transmitting TXD Output
5
Transmission
requesting
RTS It is used to connect the
Modem.
6 Transmission allowable CTS It is used to connect the
Modem.
7 Data terminal ready DTR It is used to connect the
Modem.
8 Signal ground SG
2. Outside line connection of the console port of 7204 router
Otherwise, the single-pass problem will arise on the super terminal. The cable is used
to connect the console port of the 7204 router and the outside console terminal device.
One end of the cable is a 8-pin RJ45 plug and the other end is a 9-hole plug (DB9).
The RJ45 plug is put into the socket of the console port on 7204 router. This console
cable can be provided by our company. It is numbered as RLC0301.

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3.7 Establishing the Configuration Environment
3.7.1 Establish the Local Configuration Environment Through the Console Port
To establish the local configuration environment, you need connect the serial interface
of PC and the console port of 7204 router.
1) Run the terminal imitation program on PC. If you have never run this kind of
program before, you need to click program->affix->super terminal and then the
page shown in figure 3-2 appears.
Figure 3-2 Establishing a connection
2) Set the connection ports on the page shown in figure 3-3.
Figure 3-3 Setting the connection port
3) Set the maximum baud rate to 9600, data bit to 8, parity check and flow control to
none, and stop bit to 1, as shown in figure 4-4.

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Figure 3-4 Setting communication parameters about the port

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Chapter 4 Hardware Fault Analysis
The part describes how to remove the fault from the router.
4.1 Fault Separation
The key for resolving the systematic faults is to separate the fault from the system. You
can compare what the system is doing with what the system should do to detect the
fault. You need to check the following subsystems:
Power source—power source, cable and fan
Port, cable and connection—ports on the front template of the router and the
cables connecting these ports
4.1.1 Power-Related Trouble
Do the following checkups to help remove the fault:
The power on-off is located at “ON”.
If the router is too hot, check whether the air outlet and air inlet are clean and then
do relative operations in section “Requirements for Common Locations”. The
working temperature of the router is from 0 to 40 Celsius degrees.
If the router cannot be started, check whether the LED indicator is on.
4.1.2 Faults Relative with Port, Cable and Connection
Do the following checkups to help remove the fault:
1) Check the cable if the router cannot find the port.
2) If the power on-off is at the “ON” location, check the power source and the
power cable.
4.1.3 Abnormal Troubles of the System
Do the following checkups to help remove the fault:
Check whether the PWR indicator is on.
If the console port does not work after the system is started up, check whether
the console port is set to a baud rate of 9600 bps, eight data bits, no sum check
bit, one stop bit and no traffic control.
4.2 Indicator Description
The LED indicator shows that the router is running. The following table shows the
indicators of 7204 router and their description:
No. Abbrev. Description
1 LINK It is on when the Ethernet port is connected
normally. It is off when the Ethernet port is
disconnected.

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2 ACT It flickers when data is received and
transmitted on the Ethernet port.
3 POWER If it is on, the power source runs normally.
4 SYS It is on when the system is normally started.