23

Switching Units

 

Target Scope


Switching units, which are devices for transmitting and receiving telecommunication signals and have a function, in transmitting telecommunication signals, to transmit the telecommunication signals over the route uniquely prescribed for each destination out of two or more routes over which the pertinent device can transmit (limited to ones dedicated to Internet use), except the following:

1) ones having a function to perform wireless communication (L2 switches with wireless capability),

2) ones which neither transmit nor exchange Ethernet frames,

3) ones which transmit and exchange packets of Internet Protocol,

4) ones having connection ports for transmitting/receiving telecommunication signals a half or a majority of which use two-wire connection system (a half or a majority of which do not conform to the IEEE 802.3 standard),

5) ones designed to permit incorporation into a casing, computer or the like (such as chassis type),

6) ones to control devices for wireless relaying of telecommunication signals, or

7) ones mainly intended for supplying electric power and having a maximum PoE supply capacity of more than 16 times the power consumption of the L2 switch circuit.

 

Energy Consumption Efficiency


Energy consumption efficiency shall be a value obtained by dividing power consumption (W) by the highest effective transmission rate (Gb/second).

 

Categories & Target Standard Values


In the target fiscal year and each subsequent fiscal year, for each category, the weighted average value obtained by weighting energy consumption efficiency with shipment volume shall not be above the target standard value which is a weighted average value obtained by weighting standard energy consumption efficiency*1 with shipment volume.

*1: Values obtained from the standard energy consumption efficiency calculation formulas.
CategoryStandard energy consumption efficiency calculation formula
With or without management functionType of management functionWith or without IP filtering functionCategory name
WithHaving SNMP functionWithAE=(αA+PA) ／ T
WithoutBE=(αB+PB) ／ T
Having Web management and/or other function―CE=(αC+PC) ／ T
Without――DE=(αD+PD) ／ T
Remarks:
  1. “Management function” refers to the function enabling a person managing a network to acquire information regarding hardware constituting the network, situation of communication and the like in order to efficiently administer the network.
  2. E represents the value of standard energy consumption efficiency (in watts/gigabit per second).
  3. The values of αA, αB, αC and αD shall be calculated by the following formulas, respectively.
    　αA ＝ 0.578× Ｘ1 ＋ 1.88× Ｘ2 ＋ 15.9× Ｘ3 ＋βA
    　αB ＝ 0.375× Ｘ1 ＋ 1.88× Ｘ2 ＋βB
    　αC ＝ 0.375× Ｘ1 ＋ 1.133× Ｘ2 ＋βC
    　αD ＝ 0.272× Ｘ1 ＋ 1.133× Ｘ2 ＋βD
    In a case where a switching unit has only a port or ports of 100 megabits/second or has ports of 100 megabits per second and 1 gigabit per second, if the values of αA, αB, αC, and αD are less than 3 each, they shall be deemed to be 3. In a case where a switching unit has only a port or ports of 1 gigabit per second, if the values of αA, αB, αC, and αD are less than 4.5 each, they shall be deemed 4.5.
  4. The value of X1 shall be the number of ports whose line velocity is 100 megabits per second, that of X2, the number of ports whose line velocity is 1 gigabit per second, and that of X3, the number of ports whose line velocity is 10 gigabit per second.
  5. The values of βA, βB, βC and βD shall be as stated in the respectively corresponding columns and lines in the following table.
    CategoryβAβBβCβD
    Having only a port or ports of 100 Mb/sec3.976 3.4 3.4 0.824
    Having only a port or ports of 1 Gb/sec9.94 －5.07 －2.074 －2.074
    Having only a port or ports of 10 Gb/sec0 0 0 0
    Having a port or ports of 100 Mb/sec and 1 port of 1 GB/sec2.276 1.7 2.447 1.494
    Having a port or ports of 100 Mb/sec and 2 or more ports of 1 GB/sec0.576 0 1.494 1.494
    Having a port or ports of 1 Gb/secand a port or ports of 10 GB/sec－10.24 0 0 0
  6. The values of PA, PB, PC and PD shall be calculated by the following formulas, respectively.
    PA ＝（0.0347× Pd ／PSA）／（１－ 0.0347× Pd ／PSA）× αA
    PB ＝（0.0347× Pd ／PSB）／（１－ 0.0347× Pd ／PSB）× αB
    PC ＝（0.0347× Pd ／PSC）／（１－ 0.0347× Pd ／PSC）× αC
    PD ＝（0.0347× Pd ／PSD）／（１－ 0.0347× Pd ／PSD）× αD
  7. The values of PSA, PSB, PSC and PSD shall be calculated by the following formulas, respectively.
    　PSA ＝αA×0.85 ＋１
    　PSB ＝αB×0.85 ＋１
    　PSC ＝αC×0.85 ＋１
    　PSD ＝αD×0.85 ＋１
  8. Pd shall represent the value of the maximum power supply (in watts) of power over Ethernet, and it shall be 0 where the function of power over Ethernet is absent.
  9. T shall represent the value of the highest effective transmission velocity (in gigabits/second) where the frame length is 1518 bytes.

 

Target Fiscal Year


FY2011 and each subsequent fiscal year

 

Energy Efficiency Improvement


Energy consumption efficiency was improved by about 53.8% compared with the FY2006 level in the target year (FY2011).

 

Display Items


●Product name and type

●Category name

●Line speeds of ports at the time of measurement and the number of ports by line speed

●Highest effective transmission rate when the frame length is 1518 bytes

●Maximum power supply with Power over Ethernet function (limited to ones having Power over Ethernet function)

●Energy consumption efficiency

●Name of manufacturer, etc.

 

Display Location


Display items shall be presented at locations where they can be readily noticed in catalogs showing performance indications and in documents provided by the manufacturer for product selection.

 

Requirement for Recommendations and Orders


Manufacturers or importers whose annual manufacturing volume or importing volume (limited to shipment to the domestic market) is 1,500 units or more may be subject to recommendations and orders.