Manuel d'utilisation / d'entretien du produit GSW-2491TXM du fabricant LevelOne
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GSW-2491TXM 24Fast/1 Slide-in Slot L2 SNMP Switch USER MANUAL.
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Contents 1. INTRODUCTION ................ ... .... .... ... .... .... ... .... .... ... ........ ... .... .... ... .... .... ... .... .... ... .... .. 1 Features ...................... .................. ............... .................. ............
Password Configuration ............. ................... .................. ............... ....... 24 Port Configuration .... .................. .................. ............... .................. ............... 24 Trunk Configuration .. .........
Port Mirroring ............... ............... .................. .................. ............... .................. .... 88 SNMP Management ........... ............... .... .............. ................... .................. ........... 90 Security Manager .
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1 1. Introduction Welcome to the World o f Network Switching. In the modern business society, communication and infor mation sharing are fu ndamental to our life .
2 F e a t u r e s Confirms to IEEE802.3u 10BASE-T, 802.3u 100BASE-TX, 802.3ab 1000BASE-T, 802.3z Gigabit fib er 24 auto-sensing 10/100Mbps Et hernet RJ-45 ports plus one expa nsion slot IEEE802.3x Flow control ¾ Flow control for full duplex ¾ Backpressure for half d uplex High back-plane bandwidth 8.
3 Trap, RFC 2674 VLAN MIB, private MIB Port Trunk Support IEEE802.3ad with LACP function a nd provide 7-trunk and group member up to 4 ports. The tru nk port within 24-port 10/100TX and exte nsion module... Spanning Tree IEEE802.1d spanning Tree VLAN Port based VLAN IEEE802.
4 Stacking It can be stack and management by a single IP address. The master switch can manage slave switch through any port and the stack group can be up to 8 switches. 802.1x Support IEEE802.1x U ser- A uthentication and can report to RADIUS server.
5 Compare the contents of your LevelOne GSW-2491TXM p ackage with the stan dard checklist above. IF any item is missing or damaged, please con tact your local dealer for service.
6 2. Hardware Description This Section mainly descr ibes the hardware of the LevelOne GSW-2 491TXM, and gives a physical and functiona l overview of this Module Switch. Physical Dimension The LevelOne GSW-2491TXM’s physical dime nsion is 440mmx 161mm x 44.
7 Module (Optional): There are 2 X 1000T(MDU-0140), 2 X mini GBIC(MDU-0142) modules available for the LevelOn e GSW-2491TXM. L E D I n d i c a t o r s The LED Indicators g ives real-time information of systematic operation status. The following table provides de scriptions of LED sta tus and their meaning.
8 LevelOne GSW-2491TXM as sh own in Figure 2-3. The Swit ch will work with AC in the range 100-240V AC, 50-60Hz. Figure 2-3. The R ear Panel of th e Lev e lOne GS W -24 9 1TXM Desktop Instal lation Set the Switch on a sufficien tly larg e fla t spa ce with a po wer o utlet nearby.
9 Rack-mounted Installation The LevelOne GSW-2491TXM come with a rack-mounted kid a nd can be mou nted in an EIA standard size, 19-inch Rack. The Switch can be placed in a wiring closet with other equipment. Perform the following steps to rack mount t he switch: A.
10 Figure 2-5. Mount the switch in an EIA standard 19-inch Rack Note : For proper ventilat ion, allow about at least 4 inch es (10 cm) of clearance on the front and 3.4 inches ( 8 cm) on the back of the Switch. This is e specially important for enclosed rack in stalla tion.
11 3. Network Application This section provides you a few samples of network topology in which the Switch is used. In general, the LevelOne GSW-2 491 TXM is de sign ed as a segme nt switch. That is, with its large address table (8000 MAC a ddress) and high performance, it is ideal for interconnecting networking segments.
12 Figure 3-1. Small Workgroup Application Segment Bridge For enterprise networks where large d ata broadcasts are const antly processed, this switch is an ideal solution for de partment users to conne ct to the corporate backbone.
13 Stacking Workgroup With stackable technolo gy can unites up t o eight individual sta ckable switches into a single logical unit , using cables and with stacking software supported. The stack behaves as a single swit ching unit that is manag ed by a master switch elected from one of the member switches.
14 The stackable switch (Master) The stackab le switch (Slave 01) The stack able switch (Slave 02) Cable connecti on (Cat. 5 cable) Cable conn ection (Cat.
15 4. Console Management Login in the Console Interface When the connection between Swit ch and PC is ready, turn on the PC a nd run a termin al emula tion prog ram or Hyper Terminal and configure its.
16 Console login s creen M a i n M e n u Console – Menu Line 1. Provide a menu line interface to manage and monitor the switch. U ser can use windows Hyper Terminal pro gram through the console port to connect the switch for configuration. 2. The default user name and passwo rd is “ root ”.
17 Main menu line interface Control Key description: The control keys provided in all menu s: Tab: Move the vernier to next item. Backspace: Move the vernier to previous item. Ente r: Select item. Space: Toggle selected item to next configur e or change the value.
18 Status and Counters In Status and Counters, you can view Port status, counters, and configure system parameter. You can press the “ Tab ” or “ Backspace ” to choose item, and press “ Enter ” key to select item. Status and Counters main configuration interface Port Status It displays status of port.
19 Security: display the port security status. Port status displa y interface Port Counters It displays the current port counter informatio n. Select the <Refresh> actio n to get newest port counter information.
20 System Information It displays the system pa rameter. 1. System Name: the n ame of device . 2. System Location: where the device is lo cated. 3. System Description: the name of device typ e. 4. Firmware Version: the switch’ s firmware version. 5.
21 Switch Static Configuration In Switch Static Configuration, it has 8 main function s – Administration, Port, Trunk, Port Mirroring, VLAN, Priority, MAC Address, and Misc Configuration. Under each function, there are more sub-function s. We will describe in following paragraph.
22 Device Information You can configure the device information. 1. Select <Edit> action to configure. 2. Name: assign the name for the switch. 3. Description: a short description for the switch. 4. Location: the switch location, ex: Taipei. 5. Contact: the contact person or info rmation.
23 IP Configuration interface User Name Configuration You can change the console and web management login user name. 1. Select the <Edit> 2. Enter the new u ser name 3.
24 Password Configuration You can change th e console and web management login password. 1. Select the <Edit> 2. Old Password: enter the old password. 3. New Password: enter the new password. 4. Enter Aga in: reenter the new password for confirmation .
25 7. BP: enable or disable Back P ressure f unction (Backpr essure for half duplex mode). 8. Bandwidth In/ Out: per port packet transmission rate control . Per level is 100Kbps. It supports individua l control method of TX and RX. 9. Priority: set port to high or low prio rity.
26 Trunk Configuration interface Port Mirroring Configuration The port mirroring is a method fo r monitor traffic of switched networks. The specific port can monitor traffic through the mirror ports. The mon itored ports in or out tra ffic will be duplicated into mo nitoring port.
27 Port Mirroring interface 3. Analysis po rt: Set the destination por t of mirroring packet. All of the packets o f mirroring port will b e duplicated a nd sent to Analysis port. 4. Use “ Space ” key to mark the mirroring por t can. 5. Select the <Save> .
28 VLAN Configuration You can configure VLAN in VL AN Configuration . There are four functions in VLAN Configuration mode: VLAN Configu ration, Create a VLAN Gr oup, Edit/Delete VLAN Group and Group Sorted Node. Follow the belo w description to configure VLAN.
29 Drop untagged frame. Press “ Space ” key to sele ct drop or forward the untagged frame. 3. Select <S ave> to save the configuration. VLAN Configure interface Create VLAN Group Create Port-Based VLAN 1. Select <Edit>. 2. VLAN Name: Type a name for the new VLAN, ex: VLAN01.
30 Create VLAN Group: PortBase interface Create 802.1Q VLAN 1. Enable security VLAN setting: select to ena ble or disable security VLAN group. When you select to enable secu rity VLAN group, only the members in this VLAN group can access to the switch.
31 Create VLAN G roup: 802.1Q i nterface Edit / Delete V L AN Group User can edit or delete a VLAN gr oup. 1. Select <Edit> or <Del ete> action. 2. Select the VLAN group that you want to edit or delete, then press en ter. 3. In <Edit> action, u ser can modify the membe r port and remove some memb er ports from this VLAN gr oup.
32 Edit/Delete a VLAN Group interface Group Sorted Mode You can select VLAN groups sorted mode: (1) Name (2) VLAN ID . In the Edit/Delete a VLAN group page will di splay the result. 1. Select <Edit> 2. Use “ Space ” key to select the sort mode.
33 Priority Configurati on You can configu re port priority le vel. There are 0~7- priority level can map to hig h or low queue. 1. Select <Edit> . 2. Press “ Space ” key to select the p riority level mapping to high or low queue. 3. Qos Mode: select the mode to proce ss incoming packets.
34 Priority Configuration interfac e MAC Address Configuration When you add a static MAC address, it remains in the switch's address table, regardless of whether the device is physically connected to the switch.
35 Static MAC Address Add the Static MAC Address You can add static MAC address in switch MAC table. 1. Select <Ad d> Æ <Edit> key to add the static MAC address. 2. MAC Address: Enter the MAC address of the port that should perma nently forward traffic, regardless of the device network activity.
36 Delete static MAC address 1. Select <Delete> key. 2. Choose the MAC address that you want to de lete and then press “ Enter ”. 3. When pressing “ Enter ” will complete dele tion. Filtering MAC Address You can add, delete, and edit filte ring MAC address.
37 Add Filtering MAC Address interface Edit Filtering MAC address 1. Select <Edit> key to modify a static Filtering address. 2. Choose the MAC address that you want to mod ify and then press “ Enter ”. 3. Select <Edit> key to modify.
38 number of seconds that an inactive MAC addr ess remains in the switch’s addre ss table. The valid range is 0, 300~765 se conds. Default is 300 seconds. Broadcast Storm Filter mode: configure the broadcast storm filter mode. The valid threshold values are 5%, 10%, 15%, 20%, 25%, and N/A.
39 the slave switches through the master switch. Note: 1. Before configuring the stacking function, make sure all stack switches are in the same n etwork. 2. Configure stacking function; you mu st configure the master swit ch first. 3. After you have config ured the stacking function, u se Cat.
40 Protocol Related Configu ration You can configure Spanning Tree Protocol, SNMP, LACP, IGMP/GVRP, and 802.1x in Protocol Relate Configuration section. Protocol Relate Configuration interface STP Spanning tree is a link management pr otocol that provides pat h redundancy while preventing undesirable loops in the network.
41 STP Setup You must enable Spanning Tree fun ction before configure STP function. 1. Select <Edit> 2. Use “ Space ” key to select the option. 3. Select <S ave> . STP Setup interface System Configuration You can configure the STP system parameter after enable the STP function.
42 STP System Configuration interface Per Port Setting 1. Select <Edit> . 2. Path Cost: specifies t he path cost of the port that switch uses to determin e which port are the forwarding ports. 3. Priority: This is mean port priority; you can make it mor e or less likely to become the root port.
43 Per Port Setting interface SNMP To define management stations as tr ap managers and to enter SNMP community strings. You can also define a na me, location, and cont act person for the switch.
44 SNMP System Options 1. Press <Edit> . 2. System Name: assign a na me for the switch. 3. System Contact: Type the name of contact person or organization. 4. System Location: Type the loca tion of the switch. 5. Press “ ESC ” goes back a ction menu line.
45 Add Community Strings interface Edit Com munit y Name 1. Select <Edit> 2. Choose the item that you want to modify and then press “ Enter ” . 3. Community Name: type the new name. 4. Write Access: Press “ Space ” key to chan ge the right.
46 1. Select <Delete> . 2. Choose the community name that you want to delete and then press “ Enter ”. 3. When pressing “ Enter ” will complete dele tion. Trap Managers A trap manager is a ma nagement station that receives traps, the system ale rts generated by the switch.
47 Add Trap Manager interf ace Delete Trap Manager 1. Select <Delete> 2. Choose the trap manager that you wan t to delete and then pr ess “ Enter ”.
48 LACP Configuration interface Working Ports Set ting 1. Select <Edit> 2. Group: Display the tru nk group ID. 3. LACP: Press “ Space ” key to enable o r disable LACP ( Link Aggregation Contro l Protocol) support. When LACP e nable, the group is LACP static trunk group.
49 LACP Working Ports configuration interfac e LACP State Activity 1. Select <Edit> 2. Use “ Space ” key to select the Port State Activity. Active: The port automatically sends LACP protocol p ackets.
50 Group Status When you setting trunk group, you can see the relation information in here. LACP Group State interfac e IGMP/GVRP You can enable or disable the IG MP/GVRP (GARP VLAN Registration Protocol). 1. Select <Edit> 2. Use “ Space ” key to change the value 3.
51 IGMP/GVRP Configuration interface 802.1x 802.1x Configurati on interface 802.1x Setup 1. Select <Edit> 2. Use “ Space ” key to Enable or Disable the 802.
52 802.1x Setup interface System Configuration After enabling the IEEE 802.1X function, yo u can conf igure the parameters of this function. 1. Select <Edit> 2. Radius Server IP: set the Radius Server IP address. 3. Shared Key: set an en cryption key for using during authentication session s with the specified radius se rver.
53 802.1x System Configurati on interface Per Port Configuration The State provides Disab le, Accept, Reject and Author ize. Use “ Space ” key change the state value.
54 Misc Configuration 1. Select <Edit> 2. Quiet period: set the period during which the port doesn’t try to ac quire a supplicant. 3. TX period: set the period the port wait for retra nsmit next EAPOL PDU during an authentication se ssion.
55 System Reset Con figuration System Reset Configuration interface Factory Default Reset switch to default configur ation. Pres s “ Y ” , switch will load default setting .
56 System Reboot Reboot the switch in software reset. TFTP Co nfigurat ion It provides user to update firmware or restore EEPROM value or upload current EEPR OM v alu e. TFTP Update Firmware interface Update Firmware It provides user uses TFTP to update firmwa re.
57 Update Firmware interface TFTP Restore Configuration You can restore EEPR OM va lue, which saved in TFTP se rver, from TFTP server. 1. Start the TFTP server. 2. Select <Edit> . 3. TFTP Server IP: type the IP of TFTP server. 4. Restore File Name: type the image file name .
58 TFTP Restore Configuration interfac e TFTP Backup Configuration You can save current EEPROM value to TF TP server as backup . The backup file can be restore from TFTP server when you need. 1. Start the TFTP ser ver. 2. Select <Edit> . 3. TFTP Server IP: type the IP of TFTP server.
59 TFT P Back up C onfig urat io n int erfac e X-modem Upgrade Before using X-modem upg rade, disconnect terminal a nd modify baud rate to 57600bps, then connect again. 1. Press “ X ” key to start upgrading from X-modem. 2. You will see the follow ing screen displays.
60 6. After successfully upgraded th e new firmware, ple ase modify baud rate to 9600bps..
61 5. Web-Based Management This section introduces the configuration and functions of the Web-Based management. About Web-based Mana gement Inside the CPU board of the switch exists an embedded HTML web site r esiding in flash memory.
62 Online Help You can click He l p button when you have any configuration questio n during the configuring. System Login 1. Launch the Internet Explorer. 2. Type http:// and the IP addre ss of the LevelOne GSW-2491TXM. Press “ Ente r ”. 3. The login screen ap pears.
63 Port status In Port status, yo u can view every port status that depended on user setting and the negotiation result. 1. Link: “Down” is “No Link”. “UP” is “Link”. 2. State: displa y port statu ses “disable” or “enable”. “ Unlink” will be treated as “off ” .
64 View the Port Information You can direct click the port on the Switch figure on the top of web page. Then, you will see the port information. Port information int e rface Port Statistics The following information pro vides a view of the current port statistic informat ion.
65 Port Statistics Administrator In Administrator function, it provides the following fun ctions: IP Configuration, Switch Settings, Console Port Information, Port Controls, Trunking, Forwarding and Filtering, VLAN C onfiguration, Spanning Tree, Port Mirroring, SNMP Management, Sec urity Manager, a nd 802.
66 Administrator interface IP Address User can co nfigure the IP Settings and DHCP client fu nction, tha n clicks A ppl y button. After reset the IP address, you must reb oot the switch. IP configuration interf ace Switch Setting In Switch setting, it has three parts of setting – Basic, Advance, and Misc Config.
67 Basic Switch Settings In Basic Switch Setting, it displays the swit ch basic information. System Name: the name of switch. System Location: the switch phy sical location. System Description: the description of swit ch. Firmware Version: the switch’ s firmware version.
68 Default is 300 secon ds. Max Bridge Transmit Delay Bound Control: limit the packet s queuing time in switch. If enable, the packets queued exceed will be drop. This valid value are 1sec, 2 sec, 4 sec and off. Enable Low Queue Delay Bound: limit the low priority packets queu ing time in switch.
69 Priority Queue Service settings: select the prior ity queue service type. First Come First Service: the sequ ence of packets se nt is depend on arrive order. All High before Low: the high priority packets sent before low priority packets.
70 Switch Misc Con f ig settin g interface IGMP Theory of Operation The following three topologies detail h ow IGMP Query works and to be co nfigured within a network: 1. Auto mode needs t o be enabled when the router’s IP address is smaller tha n other switches in the subnet.
71 2. IGMP needs to be enabled when the router’s IP address is not s maller than other switches in the subnet. This Router supports IGMP protocol, but IGMP has to be e nabled, and the Router has to be the Querier. 3. The following topology must be set when the IP address of the switch is not the smallest in the subnet.
72 Console Port Information Console is a standard UART interface to communicate with Serial Port. User can use windows HyperTer minal program to link the switch.
73 100K. 0: disable rate control. 1 ~ 1000 : valid rate value. Out: fill in the port effective e gress rate. The valid range is 0 ~1000. The unit is 100K.
74 connection. This feature can e xpand bandwidth to a de vice on the network. LACP operation requires full-duplex mode, more detail information refers to IEEE 802.3ad. Aggregator setting 1. System Priority: a value used to iden tify the active LACP. The switch with the lowest value has the hig hest priority and is selected as the active L ACP.
75 Trunking—Aggregator Setti ng interface Aggregator Information When you had setup the LACP a ggregator, you will see relation information in here. Trunking – Aggregator Infor mation interface Aggregator Information Stat e Activity When you had setup the LACP aggregator, you can configure port st ate activity.
76 can mark or un-mark the port. When you mark the por t and click Ap p ly button the port state activity will change to Active . O pp os ite is Passive .
77 Forwarding and Filtering IGM P Sno oping The switch support IP multica s t, you can enable IGMP pro t ocol on web manag ement’s switch setting advanced pag e, then display t he IGMP snooping inf ormation in this page, you can view difference mult icast group VID and member port in here , IP multicast addresses range from 2 24.
78 IGMP Snooping interfac e Static MAC Address When you add a static MAC address, it remains in the switch's address table, regardless of whether the device is physically connected to the switch.
79 Static MAC Address interface MAC filtering MAC address filtering allows the switch to drop unwanted traffic. Traffic is filtered based on the destination addresses. 1. In MAC Address box, enter the MAC address tha t wants to filter . 2. VLAN ID: If tag-based ( 802.
80 MAC Filtering interface VLAN configuration A Virtual LAN (VLAN) is a logical network gr oupin g that limits the broadcast domain. It allows you to isolate network traffic so only members of the VLAN receive traffic from the same VLAN members.
81 VLAN Configuration interface Port-based VLAN Packets can go amon g only member s of the same VLAN group. Note all unselected ports are treated as be longing to anothe r single VLAN.
82 VLAN – PortBase interface 1. Click A dd to create a new VLAN group. 2. Enter the VLAN name, group ID and sele ct the members of VL AN group. 3. Click A ppl y .
83 4. You will see the VL AN displays. 5. If the groups’ list is over one page, you ca n click Nex t P age to view other VLAN groups . 6. Use Del et e button to delete unwanted VLAN. 7. Use Ed it button to modify existing VLAN group. 802.1Q VLAN Tagged-based VLAN is an IEEE 802.
84 Basic 1. Click A dd button. 2. Enable GVRP Protocol: check the chec k box to enable GVRP pr otocol. 3. Group Name: assign a name for the new VLAN. 4. VLAN ID: fill in a VLAN ID (between 2-4094). The default is 1. 5. Protocol VLAN: choose the protocol type.
85 8. To set the outgoing f rames are VLAN-Tagged frame s or untagged. Then click A pply . Tag: outgoing frames with VLAN-Ta gged. Untag: outgoing frames without VLAN-Tagged . Port VID: Configure port VID settings 1. Port VLAN ID: enter the p ort VLAN ID.
86 802.1q VLAN – Port VLAN ID interface Spanning Tree The Spanning-Tree Protocol (STP) is a standardized metho d (IEEE 802.1d) for avoiding loops in swit ched networks. When STP enabled, to ensure tha t only one path at a time is active between any two nodes on the network.
87 Spanning Tree – System Configura tion interface System Configuration 1. You can view spanning tree information about the Root Bridge. 2. You can view span ning tree status about the switch. 3. You can modify STP state. After modification, click A ppl y button.
88 3. Assign the port priority value. The value ran g e is from 0 to 255. The lowest value has higher priority. 4. Click A ppl y button. SPT – Per Port Configuration interface Port Mirroring The Port mirroring is a method for monitor traffic in switched networks.
89 2. Analysis Port: It’s me an mirror port can be used t o see all monitor port traffic. You can connect mirror por t to LAN analyzer or Netxray. 3. Monitor Port: the ports you want to monitor . All monitor port traffic will be copied to mirror port.
90 SNMP Management The SNMP is a Proto co l that g o ve rns the tran sfer of in formation between management and agent. The switch supports SNMP V1. You can define manageme nt stations as trap ma nagers and to e nter SNMP community strings. You also can define a name, location, and contact person for the switch.
91 Community strings Serve as a p assword between trap manager and switch . 1. String: fill the name of string. 2. RO: Read only. Enable s requests accompanied by this string to display MIB-object information. 3. RW: Read write. Enables re quests accompanied by this string to display MIB-object information and to s et MIB objects.
92 802.1X When enabling the IEEE 802.1X fun ction, you can configure the par ameters of this function. System Configuration 1. Radius Server IP: set the Radius Server IP address. 2. Server Port: set the U DP destination port for authentication requests to the specif ied Ra dius Server.
93 Accept: the specified port is required to be held in the Authorized state. Authorized: the specified port is set to t he Authorized or Unauthorized state in accordance with the outcome of an authentication excha nge between t he Supplicant and the authentica tion server.
94 authentication se ssion. 3. Supplicant timeout: Set the period of time the sw itch waits for a supplicant response to an EAP r equest. 4. Server timeout: Set the period of time the switch waits for a server response to an authentication re qu es t.
95 TFTP Update Firmware interface Configuration Backup In Configuration Backup, yo u can restore the ba ckup configuration into the switch. Also, you can backup t he c onfiguration to TFTP server .
96 TFTP Backup Configuration You can save current EEPROM value from the switch to TFTP server, then go to the TFTP restore configuration page to restore the EEPROM value. 1. TFTP Server IP Address: fill in the TFTP server IP 2. Backup File Name: fill the file name 3.
97 System Reboot Reboot the Switch in software reset. Click Appl y button to reboot the switch. System Reboot interface Panel List Display the switch pan el GUI. When the switch is in stacking status, it display the slaves panel GUI. Wh en the switch is stand-alone status, it disp lay itself panel GUI.
98 When all slave sw itches are re moved, and then you can r emove the master switch from stacking group. If you r emove the master switch before slave switch, g o to slave switches one b y one and use cons ole configuration to re-configure th e switch configuration or you re-configure one of th e slave switched as the master by console interface.
99 IP Stacking master sw itch configure finish e d interface 5. After you have configured the stacking function, use Cat. 5 cable to connect each switch in the stacking group . And wait for few minutes f or the master switch to communicate and collect the data from the slave switches.
100 IP St acki ng F inis hed co nfig uri ng in terf ace 8. If you want to configure one of switc h in stacking group, click the h yper link on the top of screen and login to the switch that you want to configur e. You will see the screen of the switch that yo u have selected.
101 6. Troubleshooting This section is intended to help you solve the mo st common p roblems on the L evelOne GSW-2491TXM. Incorrect connections The switch port can auto de t ect straight or crossover cable when you link switch with other Ethernet device.
102 at any time. Data path loops will cause broadcast storms that will s everely impact your network performance. Diagnosing LED Indicators The Switch can be easily monito red through panel indicators to assist in id entifying problems, which descr ibes common problems you may encounter and where you can find possible solutions.
103 7. Technical Specification This section provide s the specifications of The LevelOne GSW-2491 TXM, and the following table lists these specifications. Standard IEEE802.3 1 0BASE-T IEEE802.3u 100BASE-TX/100BASE-FX IEEE802.3z Gigabit SX/LX IEE802.3ab Gigabit 1000T IEEE802.
104 MAC address 8K MAC address table with Auto learning function Memory 3Mbits for packet buffer CPU ARM- 7 Flash ROM 512Kbytes System memory 4Mbytes Dimensions 440mm(W)*161mm(D)*44.
Un point important après l'achat de l'appareil (ou même avant l'achat) est de lire le manuel d'utilisation. Nous devons le faire pour quelques raisons simples:
Si vous n'avez pas encore acheté LevelOne GSW-2491TXM c'est un bon moment pour vous familiariser avec les données de base sur le produit. Consulter d'abord les pages initiales du manuel d'utilisation, que vous trouverez ci-dessus. Vous devriez y trouver les données techniques les plus importants du LevelOne GSW-2491TXM - de cette manière, vous pouvez vérifier si l'équipement répond à vos besoins. Explorant les pages suivantes du manuel d'utilisation LevelOne GSW-2491TXM, vous apprendrez toutes les caractéristiques du produit et des informations sur son fonctionnement. Les informations sur le LevelOne GSW-2491TXM va certainement vous aider à prendre une décision concernant l'achat.
Dans une situation où vous avez déjà le LevelOne GSW-2491TXM, mais vous avez pas encore lu le manuel d'utilisation, vous devez le faire pour les raisons décrites ci-dessus,. Vous saurez alors si vous avez correctement utilisé les fonctions disponibles, et si vous avez commis des erreurs qui peuvent réduire la durée de vie du LevelOne GSW-2491TXM.
Cependant, l'un des rôles les plus importants pour l'utilisateur joués par les manuels d'utilisateur est d'aider à résoudre les problèmes concernant le LevelOne GSW-2491TXM. Presque toujours, vous y trouverez Troubleshooting, soit les pannes et les défaillances les plus fréquentes de l'apparei LevelOne GSW-2491TXM ainsi que les instructions sur la façon de les résoudre. Même si vous ne parvenez pas à résoudre le problème, le manuel d‘utilisation va vous montrer le chemin d'une nouvelle procédure – le contact avec le centre de service à la clientèle ou le service le plus proche.
