3Com 3C16895 manuale d’uso

http://www.3com.com/ Switch 7750 Installation Guide 3C16895 7-slot Chassis 3C16894 4-slot Chassis and associated modules Part No. 10014824 Published June 2005[...]

3Com Corporation 350 Campus Drive Marlbor ough, MA 01752-3064 Copyright © 2005, 3Com C orporation. All rights reserv ed. No part of this documentation may be r epr oduced in any form or by any means or used to make any deri vative work (such as translat ion, transformation, or adaptation) without written perm ission fr om 3Com Corporation. 3Com Co[...]

C ONTENTS A BOUT T HIS G UIDE Conventions 7 Related Docum entation 8 S WITCH 7750 C OMPONENTS Switch Chassis 9 Switch Backplane 9 Fabric Module 10 Submodule Slot 11 Fixed Ports 12 Module LEDs 14 Power LEDs 14 Fan LED 14 Reset Butto n 14 Fabric 32 Submodules 14 4-Port 1000BASE-X-GBI C Submodule 14 4-Port 10/100/1 000BASE-T Submodule 15 I/O Modules 1[...]

Electrical Safe ty 34 Moving the Switch 34 Laser Saf ety 34 General Site Requirements 34 Installation Space 35 Installation Checklist 35 Installing the Chassis 36 Installing in a Standar d Cabinet 36 Installing on a Workbench 36 Installing the Cabling Rack 36 Installing a Module 37 Installing a Submodule 37 Connecting t he Gr ound Wire 38 Connectin[...]

Removing the AC Power Module 61 Installing the AC Power Module 61 Replacing a Power Supply 62 Replacing I/O Modules 63 Replacing the Fan Assembly 63 T R OUBLESHOOTING T roubleshooting the Configuratio n 65 No information is displayed on the terminal 65 The display characters are illegible 65 T roubleshooting Power 65 T roubleshooting the Fan 66 T r[...]

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A BOUT T HIS G UIDE This guide describes the 3Com ® Switch 7750 and how to install hardware, configure and boot softwar e, and maintain software and har dware. This guide also provides tr oubleshooting and supp ort information for your switch. This guide is intended for qualified Se rvice personnel who are r esponsible for configuring, using, and [...]

8 A BOUT T HIS G UIDE Related Documentation The following manuals offer additional infor mation necessary for managing your Switch 7750: ■ Switch 7750 Command Reference Guide — Provides detailed descriptions of command line inte rface (CLI) commands , that yo u requir e to manage your Switch 7750. ■ Switch 7750 Configuration Guide — Describ[...]

1 S WITCH 7750 C OMPONENTS The chapter describes the following Switch 7750 components: ■ Switch Chassis ■ Switch Backplane ■ Fabric Module ■ Fabric 32 Submodules ■ I/O Modules ■ Power Module ■ Power Distribution ■ Exter nal PoE Power Syst em ■ Fan Assembly ■ Switch 7750 Specifications Switch Chassis The Switch 7750 is available [...]

10 C HAPTER 1: S WITCH 7750 C OMPONENTS Fabric Module There ar e two Fabric modules for the Switch 7750: ■ Fabric 64 (3C16857 or 3C16857R) ■ Fabric 32 (3C16872) ■ PoE Fabric 96 (3C16886) The Fabric 64 and Fabric 32 are not inte rchangeable. Y ou can install the Fab ric 32 only in a 4-slot chassis. Y ou can inst all the Fabric 64 only in th e [...]

Fabric Module 11 5 Fan LEDs 6 Power module LEDs 7 I/O module LEDs Figure 3 illustrates the fr ont panel of the Fabric 32. Figure 3 Fabric 32 1 Submodule sl ot 2 Console port 3 Ethernet port 4 Ethernet port LEDs 5 Fan LEDs 6 Power LEDs 7 I/O module LEDs 8 Reset butto n Ta b l e 4 lists Fabric specifications. Submodule Slot The submodule slot in the [...]

12 C HAPTER 1: S WITCH 7750 C OMPONENTS ■ 4-port 1000BASE-X-GBIC submodule ■ 4-port 10/100/1000BASE-T submodule For more information on these submod ules, see “Fabric 32 Submodules” on page 14 . Fixed Ports The Switch 7750 Fabric modules provide the following fixed p orts: ■ Compact Flash (CF) Port ■ 1000BASE-X-SFP (PoE Fabric 96 only) [...]

Fabric Module 13 Console Port The console port is connected to the configuration terminal usin g an RJ-45 connector . Y ou can use the console port for system debugging, configuratio n, maintenance, management, and loading application files. The console port can also be connected to a modem for functions such as remote system debugging, configu rat[...]

14 C HAPTER 1: S WITCH 7750 C OMPONENTS Module LEDs The module LEDs show the status of the I/O modules, as described in Ta b l e 10 . Power LEDs PWR1, PWR2, and PWR3 LEDs show the status of the pow er modules, as described in Ta b l e 11 . Fan LED Fan LEDs show the status of the fan frame, as described in Ta b l e 12 . Reset Button The reset button[...]

Fabric 32 Submodules 15 Figure 4 4-Port 1000BASE-X-GBIC Submodu le Ethernet GBIC port 2 Ethernet GBIC port LED Ta b l e 13 describes the 4-port 1 000BAS E-X-GB IC submodule LEDs. Ta b l e 14 lists the specifications for each of the 4-port 1000BASE-X-GBIC submodule. 4-Port 10/100/1000BASE-T Submodule The 4-Port 10/100/1000B ASE-T submodul e provides[...]

16 C HAPTER 1: S WITCH 7750 C OMPONENTS Ta b l e 15 describes the 4-port 10/100/1000BASE-T sub module LEDs . Ta b l e 16 lists specifications of the 4-port 10/100/1000BASE-T submodule. See “Electrical Port Con nector” on page 68 for an illustration of the RJ-45 connector and MDI/MDI-X pinout details. I/O Modules The Switch 7750 provides multipl[...]

I/O Modules 17 48-port 10/100BASE-T FE PoE Module The 48-port 10/100BASE-T FE PoE module provides 48 10/100 Mbps aut o-sensing Ether net ports that provide a remote power supply to powered devices Figure 12 illustrates the 48-port 10/100B ASE-T FE PoE module. Figure 6 48-port 10/100BASE-T FE PoE Module Figure 13 illustrates the front panel and LEDs[...]

18 C HAPTER 1: S WITCH 7750 C OMPONENTS 48-port 10/100/1000BASE-T PoE Module The 48-port 10/100/100 0BASE-T PoE modu le provides 48 10/100/1000 Mbps auto-sensing Ether net ports that provide a remote power supply to powered devices. Figure 12 illustrates the 48-port 10/1 00/1000BASE-T PoE module. Figure 8 48-port 10/100/1000BASE-T PoE Module Figure[...]

I/O Modules 19 Ta b l e 24 describes the specifications of the 48-port 10/100/1 000BASE-T PoE module. 48-port 10/100BASE-T Auto-sensing FE Module The 48-port 10/100BASE-T Auto-sensing FE mo dule provides 48 external 100Mbps Ether net electrical ports. Figure 10 illustrates the 48-port 10/100BASE-T Auto- sensing FE module. Figure 10 48-port 10/100BA[...]

20 C HAPTER 1: S WITCH 7750 C OMPONENTS Figure 11 Fr ont Panel of the 48-Port 10/100BASE-T Auto-sen sing FE module 1 Ethernet port 2 Ethernet port LED Each 100 Mbps Ethern et port has a green LED, indicating LINK/ACTIVE status. Ta b l e 21 describes the 48-port 10/100BASE-T Auto-sensing FE module LED. Ta b l e 22 describes the specificat ions of th[...]

I/O Modules 21 Figure 12 48-port 10/100/1000BASE-T Module Figure 13 illustrates the front panel and LEDs of the 48-port 10/100/1000BASE- T module. Figure 13 Fr ont Panel of the 48-port 10/100/1000BASE-T Module 1 Ethernet port 2 Ethernet port LED Ta b l e 23 describes the 48-port 10/ 100/1000BASE- T module LEDs. Ta b l e 24 describes the specificati[...]

22 C HAPTER 1: S WITCH 7750 C OMPONENTS 24-port 100BASE-FX MMF FE Module The 24-port 100BASE-FX MMF FE module provides 24 100 Mbps multi-mode Ethernet optical port service channels. Figure 14 illustrates the 24-port 100 BASE-FX MMF FE module. Figure 14 24-Port 100BASE-FX MMF FE Module Each 100 Mbps optical port has a green LED, as shown in Figure 1[...]

I/O Modules 23 20-Port 10/100/1000BASE-T Module The 20-Port 10/100/1000BASE-T modu le provides 20 10/100/1000BASE-T auto-sensing Ether net ports. Figure 16 illustrates the 20-Port 10/100/1000B ASE-T Module. Figure 16 20-Port 10/100/1000BASE-T Mod ule Figure 17 illustrates the front panel of the 20-port 10/100/1000BASE-T module. Figure 17 Fr ont Pan[...]

24 C HAPTER 1: S WITCH 7750 C OMPONENTS Ta b l e 28 lists specifications of the 20-port 10/100/1000BASE-T modu le. 20-Port 1000BASE- X-SFP Module The 20-port 1000BASE-X- SFP module provides 20 1000 BASE-X fu ll duplex ports and uses an SFP cable. Figure 18 illustrates the 20-po rt 1000BASE-X-SFP module. Figure 18 20-Port 1000BASE-X-SFP Module Figur[...]

I/O Modules 25 1 Ethernet port 2 Ethernet port LED Ta b l e 29 describes the 20-port 1000 BASE-X-SFP module LEDs. Ta b l e 30 lists specifications of the 20-port 1000 BASE-X-SFP module. 8-port 1000BASE-X GBIC Module The 8-port 1000 BASE-X GBIC module prov ides 8 exter nal GBIC module p orts. A GBIC module is used for each data re ceiving/transmitti[...]

26 C HAPTER 1: S WITCH 7750 C OMPONENTS Figure 20 8-Port 1000BASE-X GBIC Module Every GBIC port has a LED, as shown in Figur e 21 . Figure 21 Fr ont Panel of the 8-Port 1000BASE-X GBIC Module 1 GBIC port 2 GBIC port LED Ta b l e 31 describes the 8-Port 1000BASE-X GBIC module LEDs. The cables for each of the supported 8GBIC modules are described in [...]

I/O Modules 27 8-port 10/100/1000BA SE-T GE Module The 8-port 10/100/1000BASE- T GE module provides 8 external 10/100/1000 Mbps auto-sensing Eth ernet electrical ports. Figure 22 illustrates the 8-port 10 /100/1000BASE-T GE module. Figure 22 8-Port 10/100/1000BASE-T GE Module Each port on the 8-port 10/100/1000BASE-T GE module has 2 LEDs, as shown [...]

28 C HAPTER 1: S WITCH 7750 C OMPONENTS Ta b l e 34 describes the LEDs on the 8-po rt 10/100/100 0BASE-T GE module. Specifications of the 8-port 10/1 00/ 1000BASE-T GE module are described in Ta b l e 35 . 1-Port 10GBASE-R-XENP AK Module The 1-port 10GBASE-R-XENP AK module provides a single 10 Gbps XENP AK interface . Figure 24 illustrates the 1-po[...]

Power Module 29 Figure 25 Front Panel of the 1-Port 10GBASE-R-XENP AK Module 1 XENP AK port 2 XENP AK port LEDs Ta b l e 36 describes the 1-port 1 0GBAS E-R-XEN P AK module LE Ds. Ta b l e 37 lists specifications of the 1-port 10GBASE-R-XENP AK module. Power Module Only one AC power module is requir ed for the 4-slot chassis, although two power mod[...]

30 C HAPTER 1: S WITCH 7750 C OMPONENTS Ta b l e 38 describes the specifications of the Switch 7750 power module. Power Distribution The Switch 7750 power distribution box is installed on the chassis floor in the back of the chassis. It filters, connects, disc onnects and distributes elect rical current to the switch. The power distribution box for[...]

Fan Assembly 31 Ta b l e 39 describes the capabilities of th e Switch 7750 PoE power module. The Switch 77 50 provides power through Ethernet ports o n the PoE-suppor ted I/O modules, supporting the maximum distance of 100 m (32 8 ft.). When the Switch 7750 provides power remotely , each Ethernet po rt can provide up to 15.4 W of power to the conne[...]

32 C HAPTER 1: S WITCH 7750 C OMPONENTS Switch 7750 Specifications Ta b l e 40 pr ovides detailed information about features of the Switch 7750. Ta b l e 40 Specifications for the Switch 7750 System Item 4-Slot Chassis 7-Slot Chassis Dimens ions (W x H x D) 436 x 352.8 x 480 mm (17 x 14 x 19 in) 436 x 486.2 x 480 mm (17 x 19 x 19 in) Weight (with a[...]

2 I NSTALLING T HE S WITCH 7750 The following sections describe how to prepare and install the components of the Switch 7750: ■ Preparing to Install ■ General Site Requirements ■ Installation Checklist ■ Installing the Chassis ■ Installing the Cabling Rack ■ Installing a Module ■ Installing a Submodule ■ Connecting the Ground W ire [...]

34 C HAPTER 2: I NSTALLING T HE S WITCH 7750 ■ During the installation, wear an antistatic wrist strap and antistatic gloves. See “Static Electricity” on page 35 for additional information on preventing static. WARNING: Follow local safety regulations when performing any operation with the Switch 7750. Follow the related safety information an[...]

Installation Checklist 35 Static Electricity T o p revent damage caused by the static e lectricity , en sure that: ■ The equipment is grounded ■ The equipment room is dust-proof ■ Adequate temperature and humid ity conditions are maintained. ■ The operator wears an antistatic wr ist strap while ha ndlin g the modu le. ■ The module is plac[...]

36 C HAPTER 2: I NSTALLING T HE S WITCH 7750 ■ T ools ■ Phillips screwdriver ■ Flat-head screwdriver ■ Antistatic wrist strap ■ Cables ■ Console cable ■ AUX cable ■ Power cord and chassis gr ound wire ■ Interface cabl es for the sele cted interface modu les ■ Equipm ent ■ The switch ■ Ethernet 100BASE- T Hub or LAN switch ?[...]

Installing a Module 37 Installing a Module T o install a module: 1 Wear an antistatic wrist strap. 2 Remove the blanking plate from the chassis slot and save it for future use. 3 Hold the ejector levers of the module with both han ds and push them outward. 4 Align the module with the guides in the chassis and slide it gently into the slot. 5 Push t[...]

38 C HAPTER 2: I NSTALLING T HE S WITCH 7750 Connecting the Ground Wir e T o connect the ground wire: 1 Wear an antistatic wrist strap. 2 Remove the screw fr om the grounding hole in the switch chassis. 3 Set the ground wir e connector around the gr ounding screw . 4 Fasten the grounding screw in the hole on the chassis. 5 Connect the other end of [...]

Connecting and Configuring Power 39 Connecting the PoE Power Cord Follow these steps to connect the power cord fr om the PoE rack: 1 Loosen the mountin g screw of the PoE terminal block on the r ear panel of the switch. 2 Insert the -48V OT terminal of the DC power cord to the NEG (-) terminal of the switch and fasten the mountin g screw; insert th[...]

40 C HAPTER 2: I NSTALLING T HE S WITCH 7750 Installing the Fan Assembly T o install the fan : 1 Wear an antistatic wrist strap. 2 Remove the fan frame from the pack. 3 Hold the ejector levers on the fan f rame with both hands an d push them ou twar d. 4 Align the fan with the guides in the cha ssis and slide it gently into the slot. 5 Push the fan[...]

Installing Cables 41 Connecting Module Cables This section describes how to conne ct electrical and optical cables. Connecting Electrical Port Cables The 48-port 10/100BASE-T module an d 8-port 10/100/1000BASE-T modu le requir e a RJ-45 connector and cate gory-5 twisted pair cable. See “Electrical Port Connector” on page 68 for an illustration [...]

42 C HAPTER 2: I NSTALLING T HE S WITCH 7750 CAUTION: When connecting an SC fiber connector , the swit ch TX must be connected to the RX of the device on the network, and the swit ch RX must be connected to the TX of the device on th e network. MT -RJ fiber connector The 24-port 100BASE-FX MMF FE module requir es an MT -RJ optical fiber connector .[...]

Post-installation Checklist 43 Follow the parameters defined in Ta b l e 42 for binding cables with ties. Post-installation Checklist After you install your swit ch, use the checklist in Ta b l e 43 to verify that your switch operates correctly . WAR N IN G : Confirm that you have turned off the power before checking your installation . Improper co[...]

44 C HAPTER 2: I NSTALLING T HE S WITCH 7750[...]

3 C ONFIGURING THE S WITCH 7750 The following sections of this chap ter describe how to configure and boot the Switch 7750: ■ Configuring the Switch 7750 and a Local T erminal ■ Setting T ermina l Parame ters ■ Booting the Switch 7 750 Configuring the Switch 7750 and a Local T erminal Configure the local terminal and Switch 7750, using Figur [...]

46 C HAPTER 3: C ONFIGURING THE S WITCH 7750 Figure 32 Connection Description Dialog Box 2 Enter the name of t he new connection in the Name field and click OK . The dialog box, shown in Figure 33 displays. Select the serial port to be used from the Connect using dropdown menu. Figure 33 Properties Dialog Box 3 After selecting serial ports, click O[...]

Setting Terminal Parameters 47 Figure 34 COM1 Pr operties Dialog Box 4 Click OK . The HyperT erminal dialogue box displays, as shown in Figure 35 . Figure 35 HyperT erminal Window 5 Select Properties . 6 In the Properties dialog box, select the Settings tab, shown in Figure 36 . 7 Select VT100 in the Emula tion dropdown menu. 8 Click OK .[...]

48 C HAPTER 3: C ONFIGURING THE S WITCH 7750 Figure 36 Settings T ab Booting the Switch 7750 Before powering on the Switch 7750, verify that: ■ Power cords have been pr operly connected. ■ The voltage of power supply can me et the r equirements on the switch. ■ The console cable has been connected properly . ■ The PC or terminal for conf ig[...]

Booting the Switch 77 50 49 Powering up and Booting T ur n on the po wer for the Switch 7750 and run the BootROM program. The terminal displays the following infor mation: Starting...... RAM Line....OK System is booting..................... *************************** *************** * * * Switch 7750 BOOTROM, Ver sion 300 * * * *******************[...]

50 C HAPTER 3: C ONFIGURING THE S WITCH 7750 The display of these messages indica tes the completion o f the switc h auto-booting. Press Enter and th e terminal screen displays: <3Com> Y ou can now begin the configuratio n for the Switch 7750.[...]

4 M AINTAINING S OFTWAR E This chapter covers the following topics: ■ Upgrading Sof tware ■ Lost Passwords ■ Using the BOOT Menu Upgrading Software The following sections describe how to upgrade software on your Switch 7750: ■ Upgrading the Software Image ■ Upgrading Softwa re with F TP ■ Upgrading Software Using The BOOT Menu ■ Upgra[...]

52 C HAPTER 4: M AINTAINING S OFTWARE Trying ... Press CTRL+K to abort Connected. 220 3Com 3CDaemon FTP Server Versi on 2.0 User(none): anonymous 331 User name ok, need password Password: xxxxxxx 230 User logged in [ftp] bin 200 Type set to I. [ftp] get sw7750003.app 200 PORT command successful. 150 File status OK ; about to open data connection 22[...]

Upgrading Software 53 FAB96 self testing...................................... .... SDRAM Data lines Selftest.............. ...................OK! SDRAM Address lines Selftest........... ...................OK! SDRAM fast selftest..................................... ..OK! Please check LEDs.....................L EDs selftest finished! CPLD selftest.[...]

54 C HAPTER 4: M AINTAINING S OFTWARE Selecting the Application File for the Boot If the Switch 7750 primary image fails be cause o f a CRC error or a file format error , you can configure the system to fi n d the backup image you select to boot from. T o select the image file that you want the system to boo t from: 1 Select 0 to return to the Boot[...]

Upgrading Software 55 The file you selected is SW7750-V300R-. app, are you sure? Yes or No(Y/N) y On reboot,SW7750-V300R-.app will become the default appl ication file to boot! 7 Ty p e Y to run the primary image: Do you want to run snec400.app now? Yes or No(Y/N)? Y No Backup Image If you do not enter the number of a backup boot file, the followin[...]

56 C HAPTER 4: M AINTAINING S OFTWARE Assert at file: 'vfs_flsh.c', Line : 4549 There are 3 files in this package SRPU app file error! backup boot f ile is corrupted! Select a file to boot from! the num is 1 the num is 2 File SW7750-V300RE-8016.app is sel ected for autoBoot: backup file is SW7750-V300RE-8016.app There are 3 files in this [...]

Upgrading Software 57 packet. If the check fails, negat ive characters are sent and the sending program sends the packet again. 1 Enter 1 in the BOOT Menu and press Enter . The system accesses the download application file menu: 1. Set TFTP protocol parameter 2. Set FTP protocol parameter 3. Set XMODEM protocol parameter 0. Return to boot menu Ente[...]

58 C HAPTER 4: M AINTAINING S OFTWARE Figure 37 Send File dialog box 11 Change the protocol name for the download to Xmodem . 12 Click Send . The dialog box shown in Figu re 38 displays. Figure 38 Xmodem File Send Dialog Box 13 After the download is complete, the system interface is shown, as follows: Loading ...CCCCCCCCCCCCCCCCCCCCCCC CCCCCCCCCCCC[...]

Lost Passwords 59 A TF TP Server program is shipped on the CDROM with the Switch 7750. Before you upgrade: ■ V erify that there is a connection bet w een the TF TP server and the Switch 7750 (use the ping command.) ■ V erify th at the TF TP server is set up according to the manufacturer's instructions and that it is enabled and pointing to[...]

60 C HAPTER 4: M AINTAINING S OFTWARE CPU type : MPC8245 CPU Clock Speed : 400Mhz BUS Clock Speed : 66Mhz BOOT_FLASH type : M29W040B Flash Size : 32MB Memory Size : 256MB FAB96 self testing................ .......................... SDRAM Data lines Selftest......... ........................OK! SDRAM Address lines Selftest...... ...................[...]

5 M AINTAINING H AR DWAR E This chapter covers the following topics: ■ Replacing a Power Module ■ Replacing a Power Supply ■ Replacing I/O Modules ■ Replacing th e Fan Assembly The procedures in this chapter should be performed by traine d ser vice personnel only . Replacing a Power Module T o replace a power module, you need: ■ An antist[...]

62 C HAPTER 5: M AINTAINING H ARDWARE 6 Connect the power cords to separate AC power sour ces on separat e power grids or to a UPS/backup power system. WARNING: Do not power on the switch until you reconnect all the components. Replacing a Power Supply T o replace a power supply , you need: ■ An antistatic wrist strap ■ A screwdriver WARNING: W[...]

Replacing I/O Modules 63 Replacing I/O Modules T o replace an I/O module, you need: ■ An antistatic wrist strap ■ A Screwdriver T o remove a module: 1 Remove all the cables from the module to be removed. 2 Loosen the captive screws. 3 Hold the ejector levers on the module with both han ds, and press them towar d both sides to separate the conne[...]

64 C HAPTER 5: M AINTAINING H ARDWARE WARNING: If the fan fails, replace it with a new one without delay before operating the Switch 7750. Failure to do so will cause the switch to overheat.[...]

6 T R OUBLESHOOTING This chapter covers the following topics: ■ T roubleshooting the Config uration ■ T roubleshooting Power ■ T roubleshooting the Fan ■ T roubleshooting the Mo dules The simplest way to diagnose a fault is to check the system status LEDs on the Fabric modules. In addition , with th e DeviceMg r network management system, y[...]

66 C HAPTER 6: T ROUBLESHOOTING Ta b l e 44 describes power LEDs on the Fabric. (continued) T roubleshooting the Fan If the fan OK LED is off, check that: ■ The fan has been installed in the corr ect position for normal communication with the backplane. ■ Every heat dissipation fan is working normally . ■ There is nothing blocking the vent of[...]

A S WITCH 7750 C ABLES This appendix covers the following types of cables and connectors: ■ Console Cable ■ AUX Cable ■ Electrical Port Connector ■ Optical Fiber Cable Connectors Console Cable Figure 39 illustrates the consol e cable and connectors. Figure 39 The Console cable Ta b l e 47 lists console cable pin-outs. AUX Cable Figure 40 il[...]

68 A PPENDIX A: S WITCH 7750 C ABLES Figure 40 The AUX Cable Ta b l e 48 lists the AUX cable pin-outs. Electrical Port Connector Figure 41 illustrates the RJ-45 connector . Figure 41 The RJ-45 Connector Ta b l e 49 lists RJ-45 MDI port pin-outs. Ta b l e 48 AUX Cable Pin-outs RJ-45 Signal Direction DB-25 DB-9 1 RTS ---> 4 7 2 DTR ---> 20 4 3 [...]

Optical Fiber Cable Connectors 69 Tx = Send data Rx = Receive da ta BI = I-directional data. Ta b l e 50 lists RJ-45 MDI-X Port Pin-outs. Optical Fiber Cable Connectors Figure 42 illustrates the SC optical fiber cable connector . Figure 42 SC Optical Fiber Connector 3 Rx+ Receive data BIDB+ Send data to direction B 4 Reserved - BIDC+ Receive data f[...]

70 A PPENDIX A: S WITCH 7750 C ABLES Figure 43 . illustrates the MT -RJ fi ber optic cable connector . Figure 43 The MT -RJ Fiber Connector Figure 44 illustrates the LC connector . Figure 44 LC Connector[...]

B O BTAINING S UPPORT FOR YOUR S WITCH Register Y our Pr oduct to Gain Service Benefits T o take advantage of warranty and othe r se rvice benefits, you must first register your product at http://eSupport.3com.com/ . 3Com eSupport services ar e based on accounts that you create or have author ization to access. First time users must apply for a use[...]

72 A PPENDIX B: O BTAINING S UPPORT FOR YOU R S WITCH Software Upgrades ar e the software releases that follow the software version included with your original product. In order to access upgrades and r elated documentation you must first pu rchase a service contract from 3Com or your res e ll e r . Contact Us 3Com offers telephone, e-mail and inte[...]

Telephone Technical Support and Repair 73 Europe, Middle East, and Africa T e lephone T e chnical Support and Repair From anywhere in these regions, call: +44 (0)1442 435529 From the following countries, you may u se the numbers s hown: Austria Belgium Denmark Finland France Germany Hungary Ireland Israel Italy 01 7956 7 124 070 700 770 7010 7289 0[...]

74 A PPENDIX B: O BTAINING S UPPORT FOR YOU R S WITCH[...]