3Com 3CDSG8-US User Guide - Page 35

Power Saving Mode, Speed/Duplex, Link Up, Link Down, Disabled, 10HDX, Note: Auto, SYSTEM &gt

Get 3Com 3CDSG8-US - OfficeConnect Managed Gigabit Switch PDF manuals and user guides
UPC - 662705533162
View all 3Com 3CDSG8-US manuals
Add to My Manuals
Save this manual to your list of manuals

Page 35 highlights

Ports 35 5.1.1 Power Saving Mode The power saving modes allow the switch to reduce the amount of power it consumes by monitoring the devices connected to the switch. There are two ways in which the switch can save power: Sensing the cable length and powering down un-connected ports. The Ethernet standard has been designed to operate over cable lengths of up to 100m (328 feet). However in many networks, the cables are much shorter, meaning much of the power required to drive the signal over the full 100m distance is 'wasted'. This OfficeConnect® switch is able to determine the length of the cable between it and the connected device. For short cables below 30m (approx. 98 feet), the switch can reduce the strength of the signal while maintaining correct operation. Between 30m and 70m (approx. 230 feet) the signal amplitude will be increased compared to below 30m operation, but still with a power saving. Above 70m full signal amplitude is applied and there is no power saving. Note: When enabled, the cable length detection mode will determine the cable length every time a cable is plugged into a port and link is established. The switch is also able to determine if ports on the switch are unconnected. If this is the case then the switch can power down the port on the switch to save the power that would normally be wasted when no cable was connected. When a device is connected to the switch it will power the port back up to ensure normal operation. Note: The power saving modes have been rigorously tested to ensure that your OfficeConnect® switch meets and exceeds all the applicable industry standards. When power saving modes are being used you will not detect any loss of performance or reliability. You will be contributing to the important task of reducing global energy consumption. The Power Saving settings for the switch are set by a single drop-down list. The power saving settings are applied to all ports. The possible values are: • Full - Both cable length detection and port shutdown are enabled • Link Up - Just the cable length detection mode is enabled • Link Down - Just the port shutdown mode is enabled • Disabled - None of the power saving modes are enabled 5.1.2 Speed/Duplex The Speed and Duplex settings for the port are set by a single drop-down list. The possible values are: • Auto - Speed and duplex settings are auto-negotiated. • 10HDX - 10 Mbps, half-duplex • 10FDX - 10 Mbps, full-duplex • 100HDX - 100 Mbps, half-duplex • 100FDX - 100 Mbps, full-duplex • 1000FDX - 1000 Mbps, full-duplex Note: Auto is the default setting and need not be changed unless you are experiencing problems establishing link with a connected device (i.e. the front-panel LEDs or SYSTEM >

  • 1
  • 2
  • 3
  • 4
  • 5
  • 6
  • 7
  • 8
  • 9
  • 10
  • 11
  • 12
  • 13
  • 14
  • 15
  • 16
  • 17
  • 18
  • 19
  • 20
  • 21
  • 22
  • 23
  • 24
  • 25
  • 26
  • 27
  • 28
  • 29
  • 30
  • 31
  • 32
  • 33
  • 34
  • 35
  • 36
  • 37
  • 38
  • 39
  • 40
  • 41
  • 42
  • 43
  • 44
  • 45
  • 46
  • 47
  • 48
  • 49
  • 50
  • 51
  • 52
  • 53
  • 54
  • 55
  • 56
  • 57
  • 58
  • 59
  • 60
  • 61
  • 62
  • 63
  • 64
  • 65
  • 66
  • 67
  • 68
  • 69
  • 70
  • 71
  • 72
  • 73
  • 74
  • 75
  • 76
  • 77
  • 78
  • 79
  • 80
  • 81
  • 82
  • 83
  • 84
  • 85
  • 86
  • 87
  • 88
  • 89
  • 90
  • 91
  • 92
  • 93
  • 94
Ports
35
5.1.1
Power Saving Mode
The power saving modes allow the switch to reduce the amount of power it consumes by
monitoring the devices connected to the switch. There are two ways in which the switch can
save power: Sensing the cable length and powering down un-connected ports.
The Ethernet standard has been designed to operate over cable lengths of up to 100m (328
feet). However in many networks, the cables are much shorter, meaning much of the power
required to drive the signal over the full 100m distance is ‘wasted’. This OfficeConnect® switch
is able to determine the length of the cable between it and the connected device. For short
cables below 30m (approx. 98 feet), the switch can reduce the strength of the signal while
maintaining correct operation. Between 30m and 70m (approx. 230 feet) the signal amplitude
will be increased compared to below 30m operation, but still with a power saving. Above 70m
full signal amplitude is applied and there is no power saving.
Note:
When enabled, the cable length detection mode will determine the cable length every
time a cable is plugged into a port and link is established.
The switch is also able to determine if ports on the switch are unconnected. If this is the case
then the switch can power down the port on the switch to save the power that would normally
be wasted when no cable was connected. When a device is connected to the switch it will
power the port back up to ensure normal operation.
Note:
The power saving modes have been rigorously tested to ensure that your OfficeConnect®
switch meets and exceeds all the applicable industry standards. When power saving modes are
being used you will not detect any loss of performance or reliability. You will be contributing to
the important task of reducing global energy consumption.
The Power Saving settings for the switch are set by a single drop-down list. The power saving
settings are applied to all ports. The possible values are:
•
Full
– Both cable length detection and port shutdown are enabled
•
Link Up
– Just the cable length detection mode is enabled
•
Link Down
– Just the port shutdown mode is enabled
•
Disabled
– None of the power saving modes are enabled
5.1.2
Speed/Duplex
The Speed and Duplex settings for the port are set by a single drop-down list. The possible
values are:
•
Auto
- Speed and duplex settings are auto-negotiated.
•
10HDX
- 10 Mbps, half-duplex
•
10FDX
- 10 Mbps, full-duplex
•
100HDX
- 100 Mbps, half-duplex
•
100FDX
- 100 Mbps, full-duplex
•
1000FDX
- 1000 Mbps, full-duplex
Note: Auto
is the default setting and need not be changed unless you are experiencing
problems establishing link with a connected device (i.e. the front-panel LEDs or
SYSTEM >