SwitchBlade x3112 Installation Guide - Allied Telesis

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Chapter 1: Overview Implementation A standard Ethernet twisted-pair cable contains four pairs of strands for a total of eight strands. Network traffic at speeds of 10/100 Mbps requires only four strands (1, 2, 3, and 6), leaving four strands in the cable unused (4, 5, 7, and 8). Note 1000BASE-T cables carry the network traffic on all eight strands of the Ethernet cable. The PoE standard, IEEE 802.3at, describes two alternative ways for delivering power to a PD over twisted-pair cabling for 10/100 Mbps ports. Alternative A uses the same strands that carry the network traffic where Alternative B uses the spare strands of the cable. The PoE implementation on the AT-SBx31GP24 PoE Line Card is Alternative A, where power is transmitted over strands 1, 2, 3, and 6. PDs that comply with the IEEE 802.3at standard typically support both power delivery methods. A PD that is compliant with the standard receives its power from the switch while using either a straight or crossover cable. The AT-SBx31GP24 PoE Line Card works with most legacy PDs as long as the device can be powered on pins 1, 2, 3, and 6. A legacy device is a node that was manufactured before the IEEE 802.3at standard was completed and, consequently, may not adhere to the standard. If this is the case, a straight (MDI) cable may be needed to insure that the DC polarity is correct. 36
SwitchBlade x3112 Installation Guide AT-SBx31GS24 SFP Line Card The AT-SBx31GS24 SFP Line Card provides 24 Gigabit Ethernet small form-factor pluggable (SFP) transceiver slots. Figure 14 shows the front view of the AT-SBx31GS24 SFP Line Card. Twenty-four SFP transceiver slots are provided for fiber connections to your network. You can use these ports to connect to other Gigabit Ethernet devices over large geographical distances using fiber optic cables to other network devices. Figure 15 shows an example of an SFP transceiver. SBx31GS24 0 1000 LINK ACT 10/100 LINK ACT 12 14 2 4 6 8 10 16 18 20 22 1 3 5 7 9 11 13 15 17 19 21 23 1927 Figure 14 AT-SBx31GS24 SFP Line Card Note The AT-SBx31GS24 SFP Line Card can only be installed in slots 0 through 3 or 6 through 11 in the AT-SBx3112 Chassis. Note The CLI mnemonic for the AT-SBx31GS24 SFP Line Card in the Switchblade x3112 Management Software is “GE24SFP”. Figure 15 SFP Transceiver Note For a list of supported SFP transceivers, contact your Allied Telesis sales representative. 37
Page 1 and 2: M/S PSU FAN MASTER SLAVE NORMAL FAU
Page 3 and 4: Electrical Safety and Emissions Sta
Page 5 and 6: Contents Preface ..................
Page 7 and 8: List of Figures Figure 1: Front Vie
Page 9 and 10: List of Tables Table 1. Safety Symb
Page 11 and 12: Preface This guide provides the har
Page 13 and 14: SwitchBlade x3112 Installation Guid
Page 15 and 16: Chapter 1 Overview This chapter pro
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Page 49 and 50: Chapter 2 Installation This chapter
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Page 75 and 76: SYS STATUS M/S PSU FAN 10/100/1000B
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SwitchBlade x3112 Installation Guid
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POE PSU A and C PSU B and D PSU POW
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SYS STATUS 10/100/1000Base-T Switch
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Chapter 3 Troubleshooting This chap
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Appendix A Technical Specifications
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