SNR SNR-S2970G-24S Assembly instructions

SNR-S2970G-24S Hardware Installation
Manual

Table of Contents
- I -
Table of Contents
Chapter 1 SNR-S2970G-24S Introduction............................................................................................................................ 1
1.1 Standard Configuration.......................................................................................................................................... 1
1.2 Characteristic Parameters of SNR-S2970G-24S .................................................................................................. 3
1.3 ROHS Description ................................................................................................................................................. 4
Chapter 2 Installation Preparation........................................................................................................................................ 5
2.1 Cautions ................................................................................................................................................................ 5
2.2 Safety Advice......................................................................................................................................................... 5
2.2.1 Safety Principles........................................................................................................................................ 5
2.2.2 Safety Notices ........................................................................................................................................... 5
2.2.3 Safety Principles for Live Working............................................................................................................. 6
2.2.4 Electrostatic Discharge Prevention ........................................................................................................... 7
2.3 Requirements for Common Locations................................................................................................................... 7
2.3.1 Environment .............................................................................................................................................. 7
2.3.2 Location Configuration Prevention ............................................................................................................ 7
2.3.3 Cabinet Configuration................................................................................................................................ 7
2.3.4 Power Requirements................................................................................................................................. 8
2.4 Installation Tools and Device................................................................................................................................. 8
Chapter 3 Installing the SNR-S2970G-24S Switch............................................................................................................... 9
3.1 Installation Flow of SNR-S2970G-24S .................................................................................................................. 9
3.2 Installing the Machine Box of the Switch............................................................................................................... 9
3.2.1 Installing the Machine Box on the Desk .................................................................................................. 10
3.2.2 Installing the Machine Box on the Cabinet.............................................................................................. 10
3.3 Connecting the Port............................................................................................................................................. 10
3.3.1 Connecting the Console Port .................................................................................................................. 10
3.3.2 Connecting the 1000M Ethernet SFP Port.............................................................................................. 12
3.3.3 Connecting the Ethernet Electrical Port .................................................................................................. 13
3.4 Checking After Installation................................................................................................................................... 14
Chapter 4 Maintaining the Switch....................................................................................................................................... 15
4.1 Opening the Machine Box................................................................................................................................... 15
4.2 Closing Machine Box........................................................................................................................................... 16
4.3 Memory Upgrade................................................................................................................................................. 16
4.3.1 SDRAM Expansion.................................................................................................................................. 16
Chapter 5 Hardware Fault Analysis.................................................................................................................................... 17
5.1 Fault Separation .................................................................................................................................................. 17
5.1.1 Faults Relative with Power and Cooling System..................................................................................... 17
5.1.2 Faults Relative with Port, Cable and Connection.................................................................................... 17
5.2 Indicator Description............................................................................................................................................ 17

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Chapter 1 SNR-S2970G-24S Introduction
The document describes the characteristics and parameters of SNR-S2970G-24S and
gives an overview of SNR-S2970G-24S.
1.1 Standard Configuration
The accessory ports of SNR-S2970G-24S are formed of 24 1000M-Ethernet RJ45
ports, four 1000M Ethernet SFP ports and one console port. See table 1-1.
Table 1-1 Attributes of the accessory port
Port
Attribute
1000M Ethernet port
SFP port and UTP port (RJ45),
having LINK/ACT indicators
Console port
An RJ45 port with a rate of 9600 bps
The SNR-S2970G-24S switch also has a grounding column, one power socket and
one on-off at its back.
Figure 1-1 Front template of the SNR-S2970G-24S switch
Table 1-2 Parts at the front template of the SNR-S2970G-24S switch
No.
Abbrev.
Name
Description
1
PWR
Power indicator
If the switch is powered on, the indicator
is on.
2
SYS
System indicator
If the indicator is always on, the system
is being started.
If the indicator flickers, the system works
normally.
3
CONSOLE
Console port
Manages the switch locally.
4
none
Indicator of
each port
If the indicator is always on, the link on
the port is normal.
5
none
24 RJ45
Forward the 10/100/1000M Ethernet
electrical signals.

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ports
6
none
24 SFP ports
Forward the 1000M-Ethernet optical
signals.
Figure 1-2 Back template of the SNR-S2970G-24S switch
Table 1-3 Parts at the back template of the SNR-S2970G-24S switch
No.
Abbrev.
Name
Description
1
none
Grounding
column
The grounding must be fine.
2
none
AC power socket
AC100-240V
3
none
Power on-off
Pressing upward
means opening
power, while
pressing downward
means cutting off the
power.
4
none
Stan
dby
RP
S
pow
er
soc
ket
DC12V, used by the
RPS power

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1.2 Characteristic Parameters of SNR-S2970G-24S
Prot
ocol
stan
dar
d
Supported standard
IEEE 802.1d Spanning Tree Protocol
IEEE 802.1s multiple spanning trees
IEEE 802.1p Class of Service
IEEE 802.1q tagged VLAN
IEEE 802.3x Flow control
IEEE 802.3z asymmetric flow control
IEEE 802.3ad Link aggregation
Standard of IP routing
protocol
RFC 1058 RIP
RFC 1723 RIP v2
RFC 1583 OSPF v2
Network management
standard
RFC 1157 SNMP v1/v2
RFC 1213 MIB II
RFC 1757 RMON 1,2,3,9
Har
dwa
re
cha
ract
eris
tics
Memory
Flash Memory: 8M Bytes
SDRAM: 64Mbytes，expandable to 256Mbytes
Standard configuration
4 10/100/1000 Base-T ports
24 1000M Ethernet SFP ports
One Console port
Specifications
442mm×316mm×44mm
Working
temperature/humidity
0℃-60℃; 10%-85%; no condensation
Storage temperature/
humidity
-40℃-80℃; 5%-95%; no condensation
Power characteristics
Input voltage: AC100-240V
Input frequency: 47-63Hz
Input current: 1A/230V
Power consumption
Up to 60W

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1.3 ROHS Description

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Chapter 2 Installation Preparation
2.1 Cautions
Similar to other electronic products, the semiconductor chip easily gets damaged if you
power on and off abruptly and frequently. To restart up the switch of SNR-S2970G-24S,
you have to open the power on-off three or five seconds after the power is cut off.
Avoid severe collision or falling down from the height to protect the parts in the switch.
Use correct outside ports to connect the switch of SNR-S2970G-24S. Do not insert the
Ethernet plug into the console port (RJ45 8-line socket). Similarly, do not insert the
console cable into the console port (RJ45 8-line socket).
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 national laws
and regulations, or send these products to our company for collective processing.
2.2 Safety Advice
2.2.1 Safety Principles
Keep dustless and clean during or after the installation.
Put the cover at the safe place.
Put tools at the right place where they are not easily falling down.
Put on relatively tight clothe, fasten the tie or scarf well and roll up the sleeve,
avoiding stumbling the machine box.
Put on the protective glasses if the environment may cause damage to your
eyes.
Avoid incorrect operations that may cause damage to human or devices.
2.2.2 Safety Notices
Read the installation guide carefully before you operate the system.
Only professionals are allowed to install or replace the switch.

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Pull out the AC power socket and close the direct-current power before
operating on the machine box or working beside the power source.
The final configuration of products must comply with relative national laws and
regulations.
2.2.3 Safety Principles for Live Working
When you work under electricity, following the following principles:
Put off ornaments, such as ring, necklace, watch and bracelet, before you
operate under live working. When metal articles connect the power to the ground,
short circuit happens and components may be damaged.
Pull out the AC power socket and close the direct-current power before
operating on the machine box or working beside the power source.
When the power is on, do not touch the power.
Correctly connect the device and the power socket.
Only professionals are allowed to operate and maintain the device.
Read the installation guide carefully before the system is powered on.
Note:
1) Check potential dangers, such as the humid floor, ungrounded extensible power
line and tatty power line.
2) Install the emergent on-off at the working room for turning off the power when
trouble happens.
3) Turn off the power on-off of the switch and plug off the power line before
installing or uninstalling the machine box or working beside the power.
4) Do not work alone if potential dangers exist.
5) Cut off the power before checkout.
6) If trouble happens, take the following measures:
A. Cut off the system’s power.
B. Alarm.
C. Take proper measures to help persons who are hit by the disaster. Artificial
respiration is needed if necessary.
D. Seek for medical help, or judge the loss and seek for available help.

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2.2.4 Electrostatic Discharge Prevention
Electrostatic discharge may damage devices and circuits. Improper treatment may
cause the switch to malfunction completely or discontinuously.
Move or locate the devices according to the measures of electrostatic discharge
prevention, ensuring the machine box connects the ground. Another measure is to
wear the static-proof hand ring. If there is no hand ring, use the metal clip with the
metal cable to clip the unpainted metal part of the machine box. In this case, the static
is discharged to the ground through the metal cable of the clip. You can also discharge
the static to the ground through your body.
2.3 Requirements for Common Locations
This part describes the requirements for the installation locations.
2.3.1 Environment
The switch can be installed on the desk or the cabinet. The location of the machine
box, cabinet planning and indoor cabling are very important for normal system’s
function. Short distance between devices, bad ventilation and untouchable control
plate will cause maintenance problems, systematic faulty and breakdown.
For location planning and device locating, refer to section 2.3.2 “Location Configuration
Prevention”.
2.3.2 Location Configuration Prevention
The following preventive measures assist you to design the proper environment for the
switch.
Make sure that the workshop is well-ventilated, the heat of electrical devices is
well-discharged and sufficient air circulation is provided for device cooling.
Avoid to damage devices by following the electrostatic discharge prevention
procedure.
Put the machine box at the place where cool air can blow off the heat inside the
machine box. Make sure the machine box is sealed because the opened
machine box will reverse the cool air flow.
2.3.3 Cabinet Configuration
The following content assists you to make a proper cabinet configuration:
Each device on the cabinet gives off heat when it runs. Therefore, the sealed
cabinet must have the heat-discharge outlet and the cooling fan. Do not put the
devices too close, avoiding bad ventilation.

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When you install the machine box at the open cabinet, prevent the frame of the
cabinet from blocking the airway of the machine box.
Ensure that nice ventilation is provided for the devices installed at the bottom of
the cabinet.
The clapboard separates exhaust gas and inflow air, and boost the cool air to
flow in the machine box. The best location of the clapboard is decided by the air
flow mode in the machine box, which can be obtained through different location
tests.
2.3.4 Power Requirements
Make sure that the power supply has nice grounding and the power at the input side of
the switch is reliable. The voltage control can be installed if necessary. At least a 240 V,
10A fuse or a breaker is provided in the phase line if you prepare the short-circuit
prevention measures for a building.
Caution:
If the power supply system does not have good grounding, or the input power disturbs
too much and excessive pulses exist, the error code rate of communication devices
increases and even the hardware system will be damaged.
2.4 Installation Tools and Device
The tools and devices to install the SNR-S2970G-24S switch are not provided by the
SNR-S2970G-24S switch. You yourself need to prepare them. The following are the
tools and devices needed for the typical installation of the SNR-S2970G-24S switch:
Screwdriver
Static armguard
Bolt
Ethernet cable
Other Ethernet terminal devices
Control terminal

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Chapter 3 Installing the SNR-S2970G-24S Switch
Caution:
Only professionals are allowed to install or replace the devices of SNR-S2970G-24S.
3.1 Installation Flow of SNR-S2970G-24S
3.2 Installing the Machine Box of the Switch
The installation of the machine box concludes the following cases:
Installing the Machine Box on the Desk
Installing the Machine Box on the Cabinet

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3.2.1 Installing the Machine Box on the Desk
The SNR-S2970G-24S switch can be directly put on the smooth and safe desk.
Note:
Do not put things weighing 4.5 kg or over 4.5 kg on the top of the switch.
3.2.2 Installing the Machine Box on the Cabinet
The machine box of the switch is fixed on the cabinet through the brackets. When you
fix the brackets, the front template of the switch faces forward. The detailed operations
are shown in Figure 3-1.
Figure 3-1 Fixing the machine box of the switch
After the brackets are installed, install the switch on the cabinet. See Figure 3-2.
Figure 3-2 Installing the switch on the cabinet
3.3 Connecting the Port
3.3.1 Connecting the Console Port
The switch of SNR-S2970G-24S has a Console port.
The rate of the console port is a value ranging from 1200bps to 115200bps. It has a
standard RJ45 plug. After you connect the console port to the serial port of PC through
a console cable, you can configure and monitor the switch of SNR-S2970G-24S by
running a terminal emulation software, such as super Windows terminal. The cable is
provided according to the host. The communication parameters of the terminal serial

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port can be set to a rate of 9600bps, eight data bits, one stop bit, no sum check bit and
traffic control.
The RJ45 connector of the console port is shown in Figure 3-3. The RJ45 plug
corresponds to the RJ45 socket, whose pins can be aligned from left to right with the
value from 1 to 8.
Figure 3-3 RJ-45 connector of the console port
Figure 3-4 Connecting the console port of SNR-S2970G-24S and computer
Table 3-1 Definition of the pins of the UTP port
No.
Name
Symbol
Remarks
1
Carrier Detecting
CD
No connect
2
Data receiving
RXD
Input
3
Data-line device ready
DSR
No connect
4
Data transmitting
TXD
Output
5
Transmission requesting
RTS
No connect
6
Response transmitting
CTS
No connect
7
Data terminal ready
DTR
No connect
8
Signal ground
SG
GND
Note:

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The console port of the SNR-S2970G-24S switch does not support traffic control.
Therefore, you must set the option data traffic control to none when you configure
the switch with the super terminal. Otherwise, the single-pass problem will arise on the
super terminal.
Otherwise, the single-pass problem will arise on the super terminal. The cable is used
to connect the console port of the SNR-S2970G-24S switch and the outside console
terminal device. One end of the cable is an 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 the
SNR-S2970G-24S switch. The inner line connection in the cable is shown in figure 3-5.
The console cable is numbered as RLC0301.
Figure 3-5 Cable connection at the console port
3.3.2 Connecting the 1000M Ethernet SFP Port
SNR-S2970G-24S provides 12 1000M SFP ports. The upper indicators of the ports are
used to indicate the LINK state of the port, while the bottom indicators of the ports are
used to indicate the ACT state of the port. You can insert the SFP module and then
connect it to other Ethernet terminal devices through the optical fiber if you want to use
the 1000M SFP port.

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3.3.3 Connecting the Ethernet Electrical Port
The SNR-S2970G-24S switch has four 10/100/1000Base-T ports. Each electrical port
uses the two indicators corresponding to those of the SFP port, indicating the
LINK/ACT state of the port. You can connect other Ethernet terminal devices to the
UTP port through the cut-through or cross network cable. The numbering order of the
pins in the UTP port is the same as the console port.
Figure 3-6 RJ-45 connector of the console port
Because four 10/100/1000Base-T ports of SNR-S2970G-24S support the MDI/MDIX
auto-identification of the cable, SNR-S2970G-24S can adopt five classes of
direct-through/cross network cables when it connects other Ethernet terminals.
Figure 3-7 Connecting the 1000Base-TX port and other Ethernet terminals
Table 3-2 Definition of the pins of the UTP port
No.
Name
Symbol
Remarks
1
Sending the normal phase
of the data
TXD1+
Output
2
Sending the paraphase of
the data
TXD1-
Output

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3
Receiving the normal
phase of the data
RXD1+
Input
4
Sending the normal phase
of the data
TXD2+
Output
5
Sending the paraphase of
the data
TXD2-
Output
6
Receiving the paraphase
of the data
RXD1-
Input
7
Receiving the normal
phase of the data
RXD2+
Input
8
Receiving the paraphase
of the data
RXD1-
Input
The direct-through or cross network cable has the function of auto-identification, so the
five classes of direct-through/cross network cables can be used to connect other
Ethernet devices.
3.4 Checking After Installation
Before electrically starting up the switch, perform the following checkups after the
switch is installed:
If the switch is installed on the cabinet, check whether the installation point
between the cabinet and the switch is strong. If the switch is installed on the
desk, check whether there is enough space for the switch to discharge its heat
and whether the desk is stable.
Check whether the connected power meets the power requirements of the
switch.
Check whether the grounding line is correctly connected.
Check whether the switch is correctly connected to other terminal devices.

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Chapter 4 Maintaining the Switch
Caution:
1) Before opening the machine box, make sure that you have released the static
you carried and then turn off the power on-off of the switch. Before operating any
step in Appendix B, read the section “Safety Advice”.
2) Before performing operations beside the power source or on the machine box,
turn off the power on-off and plug out the power cable.
4.1 Opening the Machine Box
This section describes how to open the cover of the switch, required tools and
operation methods.
Caution:
When the power cable still connects the power source, do not touch it.
When you open the cover the switch, you may use the following tools:
Crossed screwdriver
Static armguard
Perform the following steps to open the cover of the switch:
(1) Turn off the power on-off of the switch.
(2) Plug out all cables connected the back of the switch.
(3) Take out the bolt from the machine box with the screwdriver.
Note:
The machine box comprises of two parts: cover and bottom.
(4) Open the cover by holding two sides of the cover towards the direction of the
arrow key shown in the following figure:
(5) When the cover is opened, put it aside. The mainboard of the system appears.

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Note:
After taking off the cover, put it horizontally and avoid it to be crushed or collided.
Otherwise, the machine box is hard to install.
4.2 Closing Machine Box
The section mainly describes how to put the cover and close the machine box. Do as
follows:
(1) Put them well according to their locations and joint them together along their
sides.
(2) See the following figure.
(3) When the cover and the bottom are closely tied, let the cover slide the slot of the
front template at the bottom.
(4) Nail the bolt and screw it tightly with the screwdriver.
(5) Reinstall the switch on the cabinet or the desk.
(6) Reconnect all cables of the switch.
4.3 Memory Upgrade
4.3.1 SDRAM Expansion
Because SDRAM of SNR-S2970G-24S adopts the patch design, you have to offer
your SDRAM expansion requirement before purchase.

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Chapter 5 Hardware Fault Analysis
The part describes how to remove the fault from the switch.
5.1 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 and cooling systems—power and fan
Port, cable and connection—ports on the front template of the switch and the
cables connecting these ports
5.1.1 Faults Relative with Power and Cooling System
Do the following checkups to help remove the fault:
When the power on-off is at the “ON” location, check whether the fan works
normally. If the fan does not work well, check the fan.
If the switch is too hot, check whether the air outlet and air inlet are clean and
then do relative operations in section 2.3 “Requirements for Common Locations”.
The working temperature of the switch is from 0 to 40 Celsius degrees.
If the switch cannot be started and the PWR indicator is off, check the power.
5.1.2 Faults Relative with Port, Cable and Connection
Do the following checkups to help remove the fault:
If the port of the switch cannot be linked, check whether the cable is correctly
connected and whether the peer connection is normal.
If the power on-off is at the “ON” location, check the power source and the
power cable.
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.
5.2 Indicator Description
The LED indicator shows that the switch is running. The following table shows the
indicators of the SNR-S2970G-24S switch and their description:

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No.
Abbrev.
Name
Description
1
PWR
Power indicator
If the switch is powered on, the indicator
is on.
2
SYS
System indicator
If the indicator is always on, the system
is being started.
If the indicator flickers, the system works
normally.
3
none
Indicator at
the top of
each port
If the indicator is always on, the link on
the port is normal.
If the indicator is off, the link on the port
is cut off.
4
none
Indicator at
the bottom of
each port
If the indicator flickers, the data is
received or transmitted through the port.
If the indicator flickers, the data is
received or transmitted through the port.