At one of the option specifications of G.992.1 which decides the standard of ADSL, reducing the data quantity of the error correcting code, the technology which improves transmission speed.

With G.992.1 the lead/read SOLOMON mark we adopt error correcting code, this mark as much as bit number of the extent error correcting code where the bit number which makes correction possible is long becomes long. This correction bit number the value which is stipulated with G.992.1 (S=1) is held down to half, that much the technology which is allotted to the transfer of the data itself is S=1/2.

In the ADSL circuit which uses S=1/2 technology, with respect to theory being highest, the transfer with 16Mbps becomes possible. But, because attenuation of the signal and there is interference from the other circuit really, the transfer rate of 12Mbps is made the limit from substance 10Mbps.

S=1/4

Reading: S equal it is the [bu] it is to be, the [chi]
Field:
Communication service > broadband > xDSL > S=1/4

At one of the acceleration technology of ADSL, reducing the data quantity of the error correcting code, the technique which improves transmission speed.

Every single, with G.992.1 the “lead/read SOLOMON mark” error correcting code the standard of ADSL is adopted. With this coding system, also the extent correction possible data length which makes the bit number of the error correcting code long becomes long. Correction bit number the value which is stipulated with G.992.1 (S=1) is held down to 1/4, that much it is the technology which is allotted to the transfer of the data itself.

When S=1/4 is adopted, in the simplicity calculation being highest, the transfer with 32Mbps becomes possible, but because attenuation of the signal and there is interference from the other circuit really, transfer rate approximately of substance 24Mbps is made the limit. Actually, S=1/4 is used the menu and the like of “24M” “26M” of each company and so on.

S=1/8

Reading: The s equal bee [bu] it is to be, the [chi]
Field:
Communication service > broadband > xDSL > S=1/8

At one of the acceleration technology of ADSL, reducing the data quantity of the error correcting code, the technique which improves transmission speed.

Every single, with G.992.1 the “lead/read SOLOMON mark” error correcting code the standard of ADSL is adopted. With this coding system, also the extent correction possible data length which makes the bit number of the error correcting code long becomes long. Correction bit number the value which is stipulated with G.992.1 (S=1) is held down to 1/8, that much it is the technology which is allotted to the transfer of the data itself.

When S=1/8 is adopted, in the simplicity calculation being highest, the transfer with 64Mbps becomes possible, but because attenuation of the signal and there is interference from the other circuit really, substance 40Mbps super transfer rate is made the limit. Actually, S=1/8 is used with the menu of “40M” “45M” of each company and so on.

S2ML

Reading: S two m l
Full spelling: Security Services Markup Language
Field:
Security > certification > S2ML
Expression of information > markup language > XML > S2ML

The Netegrity corporation being center, the conception which it was advancing, opening regarding the security of electronic commerce draws up standard. XML schemer language and RRP (Request/Response Protocol) and the like deciding, it had been about to actualize the function of safe user identification and the permission which utilize XML.

S2ML because it is defined, opening as standard not to receive the influence with the difference of below, such as SOAP and MIME and ebXML to apply it is possible to various protocol. In addition, if first one time certification is received, be able to move between the sights which are conformed to S2ML freely, you say that it is not necessary each time to do certification also “single sign on” function had.

Aiming toward standardization, it was submitted to W3C and OASIS, but finally, OASIS S2ML adopting also the element of AuthXML to the base, embarked on decision SAML (Security Assertion Markup Language) as a XML based security standard specification.

SA Security association

Reading: S a
Full spelling: Security Association
Field:
Security > network > SA

Before beginning communication at the time of encoding communicating which utilizes IPsec and IPv6, you exchange & share the information of encoding system and the cipher key, etc establish the safe channel. When the hypothetical cryptographic channel which is established (the tunnel) it points to thing, it is.

With SA in IPsec, decision of encoding system and exchange and mutual certification of the key are done IKE (Internet Key Exchange) with by the standard procedure which is said. SA is renewed periodically, verification of identity and reissue of the cipher key re-exchange is done.

SaaS

Reading: [sazu]
Full spelling: Software as a Service
Field:
Enterprise information system > SaaS
IT industry > Saas

Distribution form of the software which among functions of the software, it tries to be able to distribute just those which the user needs to be able to utilize as service. Also the service type software is called.

The user when being necessary, be able to utilize only necessary function, fee equal to the amount which responds to the function which is utilized is paid. There is a form which through network, utilizes those of the form where the user downloads necessary function, installs to itself terminal and the function of the software which operates on the server the online. Recently latter form has become many.

The usual software collects necessary function entirely for all users, has reached the point where the same function to all users is offered. This kind of software becomes redundant ones where the function there is no excessively necessity for the user certain 1, is mainly loaded, means to pay fee vis-a-vis the function there is no necessity. Then, be able to utilize only the function where the individual user is truly necessary in on demand, method of thinking, SaaS which pays only vis-a-vis that function appeared.