Allied-telesis AT-8550SP Bedienungsanleitung Seite 20
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Overview
20
10/100/1000Base-T Twisted Pair Ports
This section applies to Port 49R and Port 50R on the AT-8550GB and
AT-8550SP switches.
Type of
Connector
The ports have 8-pin RJ-45 connectors. The ports use four pins when
operating at 10 or 100 Mbps and all eight pins when operating at
1000 Mbps.
Speed The ports can operate at 10, 100, or 1000 Mbps. The speed is set
automatically through Auto-Negotiation or you can set the speed to 10
or 100 Mbps manually through the management software.
Note
Ports 49R and 50R can operate at 1000 Mbps only when set to Auto-
Negotiation. You cannot manually set these ports to 1000 Mbps.
Duplex Mode The ports can operate in either half- or full-duplex mode. The ports are
IEEE 802.3u compliant and will Auto-Negotiate the duplex mode. If
needed, Auto-Negotiation can be disabled so that you can set the
duplex mode manually through the management software.
Note
In order for a 10/100/1000Base-T port to successfully Auto-
Negotiate its duplex mode with an end node, the end node should
also be using Auto-Negotiation. Otherwise, a duplex mode
mismatch can occur. A port, using Auto-Negotiation, will default to
half-duplex if it detects that the end node is not using Auto-
Negotiation. This will result in a mismatch if the end node is
operating at a fixed duplex mode of full-duplex.
To avoid this problem, when you connect an end node with a fixed
duplex mode of full-duplex to a 10/100/1000Base-T port, you
should use the AT-S62 management software to disable Auto-
Negotiation on the port and set the port speed and duplex mode
manually.
Maximum
Distance
The ports have a maximum operating distance of 100 meters (328 feet).
Type of Cable For 10 Mbps, the port requires Category 3 or better 100 ohm shielded or
unshielded twisted pair cabling. For 100 or 1000 Mbps operation, the
ports require Category 5 or Enhanced Category 5 (5E) 100 ohm shielded
or unshielded twisted pair cabling.
- Installation 1
- Statement 3
- Table of Contents 4
- How This Guide is Organized 7
- Document Conventions 8
- Contacting Allied Telesyn 10
- Overview 11
- Model Descriptions 12
- AT-8524M 13
- AT-8550GB 15
- 100-240VAC 16
- RPS INPUT 16
- Hardware Features 17
- Connector 18
- Auto-MDI/ 21
- 100Base-FX Fiber Optic Ports 22
- Power Over Ethernet 23
- AT-8524POE’s 24
- Implementation 24
- Budgeting 24
- GBIC and SFP Expansion Slots 26
- Module Expansion Slots 27
- Fiber Optic Port LEDs 32
- System LEDs 34
- RS-232 Terminal Port 35
- RPS Connector 36
- AC Power Connector 37
- DC Power Connector 38
- MAC Address 39
- Store and 41
- Backpressure 41
- Network Topologies 42
- Collapsed 43
- Backbone 43
- Topology 43
- Reviewing Safety Precautions 46
- Planning the Installation 48
- Unpacking the Switch 50
- AT-8516F/SC 53
- AT-8524M, and 53
- AT-8524POE 53
- 0/100/1000BASE-T 54
- 1000BASE-T 55
- AT-8550SP 58
- Wiring a DC Powered Unit 66
- 8mm ±1mm 67
- (0.31in. ±0.039 in.) 67
- Warranty Registration 71
- Troubleshooting 72
- — Verify that the GBIC 74
- Technical Specifications 77
- Environmental Specifications 78
- Power Specifications 79
- Standards 81
- SNMP Support 82
- RS-232 Terminal Port Pinouts 87
- RPS Connector Port Pinouts 88
- Dual SC Type Connector 91
- Emission Information 92
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