截止目前已经有多位GuitarChina牛淫加盟，更有专业老师担任管理员~~

中文/英语/法语/西班牙语… 交流，想进的请加~~

ADSL stands for Asymmetric Digital Subscriber Line, is a common form for internet link from ISP to premise. The word “asymmetric” indicates that the data flows faster in one direction than the other, usually, the downlink speed is 6-10 times than the uplink speed(should I use download/upload here?) varies with the standards and specific implementations. Like in ANSI T1.413 standard(approved in 1998, the first standardized ADSL specification), the downlink speed is 8Mbit/s and uplink speed is 1.0Mbit/s; in ITU G.992.3 standard(approved in 2002, ADSL2), the downlink speed is 12Mbit/s and uplink speed is 1.0Mbit/s. The ITU G.992.5(ADSL2+) extends the capability in data rate to 24Mbit/s downstream and 1.0Mbit/s upstream.

The ADSL transmit data over the conventional copper telephone lines, it does this by employing the frequencies that are not used for voice call. We all know that our hearing covers about 20kHz, our voice have a band of 300~4000 Hz, thus, the telephone network use the 0~4kHz band of the line. Simply, we acknowledge that 0~1104 kHz are used in ADSL1 and ADSL2, 0~2.2MHz are used in ADSL2+. In this article, we only discuss the general concept and all the principles are illustrated according the standand ANSI T1.413.

Before we start talking the ADSL, we need to understand some basic definitions first:

>> Acknowledgement(ACK): is one or several transmission control packets/frames/bytes/bits transmitted by the receiving station as an affirmative response to the sending station.

>> Gain: is a power/amplitude ratio between a output signal of a system and a input signal of the same system, usually refered in amplifier circuit.

>> Equalizer: an electronic element or a digital algorithm used to flat(sometimes alter) the amplitude/frequency characteristics of a system.

>> Attenuation: is the energy loss of the signal transmitted through a medium. The atenuation mainly depends on the line physical properties/signal frequency/line joins/line length, in some means, the attenuation can be lessened by using a advanced technologies.

>> Noise: noise can be generated by any device near the line that can produce electromagnetic pulses at a frequency band of 0~1.1MHz, noise can be reduced by using a line protector or by filtering the signal(using a filter).

>> Crosstalk: when telephone lines are laid from the ISP to your premise, they are tightly bundled together. As an ADSL signal flows through line A, it will create electromagnetic signals in the adjacent line B/C/D… likewise, the signal travels down the line B wil also generate signals in other neighboring lines. This type of signals is crosstalk, and the crosstalk is not a part of the original signal we desire.

>> SNR: signal to noise ratio, this parameter can be simply get by calculating the ratio of the signal amplitude and noise amplitude. SNR is a total measurement of the transmission quality, a higher SNR means a higher transmission quality.

>> QAM: stands for Quadrature Amplitude Modulation, this type of modulation is a combination of amplitude modulation(data is represented by differing amplitudes) and phase shift keying modulation(data is represented by shifting each wave relative to the wave came before it). In a QAM signal, there two carriers(I signal and Q signal), each having the same frequency but having a phase-shift of 90 degrees(1/4 of a cycle -> quadrature). Mathematically, one of the signal can be represented by a sine wave while the other can be represented by a cosine wave. Each of these two carriers are modulated via two separate balanced modulators, and then combined(algebraically summed) at the source for transmission. At the destination, the carriers are separated, the data is extracted from each, and combined into the original modulating information.

>> DMT: stands for Discrete Multi Tone(modulation). DMT is a version of modulation which the date is distributed over a large number of sub-frequency-band(Tone), each of the sub-band uses a form of QAM modulation. ADSL employs this type of modulation. In ADSL ANSI standard, the whole frequency bandwidth(0~1104kHz) is devided into 256 separated 4.3125kHz wide spans called Tone. Usually, Tone 1~8(0kHz~34.5kHz) is conserved for voice call and as a guard between voice signals and ADSL signals, Tone 9~32 is utilized for uplink channels, Tone 33~256 is kept for downlink stream.

Now, let’s see how a raw signal be processed and then transmitted on ADSL scheme… Go dig it…

==> Initialization

The objective of the initialization is to measure the cable and tone properties, hence determine the best system configuration to maxmize data rate and system reliability. The initialization process can be divided into 4 stages:

1. Activation & Acknowledgement

After both ADSL modems powered up, the sender modem starts sending a request to the receiver modem to commence the training procedure. The requests and the acknowledgements between the two modems are used to config the transmission and reception gains at both sides. At the end of this process, both modems are operating at an optimum level to max the sensitivity of the system.

2. Training

During this process, the modems send known frames in both directions.By comparing the received frames and the original frames, the system complete the following tasks:

I. Determine time and frequency domain equalizer parameters.

II. Time synchronization in both modems.

III. Frame alignment.

3. Channel Analysis

After all the adaptive parameters are adjusted, the modems calculate the SNR of each tone, using this information, the modems allocate the number of bits(2~16) will be transmitted in each individual tone. If a tone has too low SNR to transmit data, this tone will be directly abandoned.

4. Synchronization & Data Exchange

Finally, each modem communicates to the other modem the ultimate transmission parameters. After this, both modems are synchronized and ready for data exchange.

==> Data Framing

Data transmitted in ADSL scheme is organized into frames and superframes. The frame size is not fixed, but each frame has a time duration of 246 us(a frame must be sent every 246 microseconds), with different frame size we can implement a different link speed. A superframe is built with 68 ADSL data frames and one synchromization frame, the sync frame is used to provide superframe synchronization and identify the start of the superframe. Size of superframe is not fixed either as the frame size is not fixed, and from the duration of one frame, the time duration of a superframe can be get: 246 us * 69 f/sf = 17 ms.

Remember, the data operated here and the following processes befor DAC is digital 1s and 0s.

==> Forward Error Correction

After the data are framed, about 10%~20% of redundant error correction bytes will be inserted to the data stream(vary with frame size). Forward error correction bytes are also called Reed-Solomon Bytes(sounds unfamiliar? Let me name some of its applications: CD/DVD/Blue-Ray Discs/DSL/WiMax/Raid 6/DVB/ATSC…), they are used to detect and correct data errors at the receiver side. In a basic sense. A R-S byte is a sum of several preceding bytes, at the receiver side, if anything is lost from the data stream it can be recalculated from the sum.

We need to bear in mind that if the number of bytes wither errors is more than half of the error correction bytes, the data cannot be corrected, the decoder raises a flag, these data bytes are discarded. In this case, as the data transmission is based on TCP/IP protocol, the sender does not receive acknowledgement of successful data delievery, the missing packet has to be retransmitted.

==> Modulation

As mentioned before, ADSL employs discreted tones for data transmission, during the initialization process, the modems estimate the SNR of each single tone and then assign the number of bits will be transmitted in each tone. At current phase, the data processed before are distributed whith the selected tones. A tone with a higher SNR may accommodate a higher number of bits, correspondingly, a tone with a poor SNR will lodge a low number of bits. This process of allocating bits to specific tones is called Tone Ordering.

Once the tone ordering is done, the data is modulated in QAM for each of the tone.The QAM use a constellation to modulate the signal depends on the number of bits assigned to each particular tone. For example, the 4 bits constellation(16 points are needed to represent the 4 bits data), these points are plotted in the X-Y plane distributed equally in each quadrant. Different 4-bits-data are defined by differing amplitudes(Ax,Ay) of the I and Q signal(sine and cosine wave). Take the points m and n for example, point m(0011) may be represented by 2*Sin(wt)+2*Cos(wt), and point n(1001) may be represented by 1*Sin(wt)-2*Cos(wt).

This process is repeated with all the other tones being used for data link. The ultimate output of this QAM block is a list of Ax and Ay amplitudes for each tone(still digital signals), at this point, the amplitude values, in reality, are a representation of the digital data in the frequency domain.

Y

|

0000  0001  |  0010  0011

|          m

|

0100.    .    |    .    .

|

———————|——————> X

|

.    .    |    .    .

|

.    .n   |    .    . 1111

1100       |   1110

|

4bits – 16points(0000~1111) QAM Constellation (Set Font = Courier New)

==> Inverse Fast Fourier Transform (IFFT)

During this process, the IFFT block loads the 224(tone 33~256) pairs of Ax-Ay amplitudes delivered by QAM module as its input, and generates appropriate sin and cos waves for each tone. As mentioned before, these signals processed now are frequency domain signals and the DMT is a time domain scheme, so, the signals are processed using a IFFT algorithm to be converted from frequency domain to time domain. Afterwards, signals are summed up producing a time domain waveform.

==> DAC

Ultimately, the waveform is loaded at a buffer and then downloaded to a DAC chip to convert to analog signals for line transmission. The output of this chip the routed to some analog devices(filter, driver…) to be transmitted through the copper line.

Reference:

wikipedia.org: ADSL, ANSI T1.413, ITU G.992.3, DSL, ADSL Modem, Modulation, QAM, DMT, TCP, Equalization,Gain…

google.com: ADSL, ADSL Theory, DSL, DMT, QAM…

http://whirlpool.net.au/wiki/?tag=ADSL_Theory

http://www2.rad.com/networks/2005/adsl/main.htm

Halliburton Gamma Telemetry Tool Service Manual

Halliburton Gamma Telemetry Tool Field Operation Manual

http://www.iol.unh.edu/services/testing/dsl/training/ (There are plenty of materials about DSL, and it’s a pity that I almost complete this article when I found this site)

Information => Source Encoding => Channel Encoding => Channel Transmission + Noise => Channel Decoding => Source Decoding => Information

1.  Non-Return To Zero (NRZ)

NRZ is the most common form of binary data in telecommunication. In this encoding, the voltage level of the NRZ data determines binary values. “1s” are represented by one physical voltage level and “0s” are represented by another voltage level. Usually, a positive voltage level and a negative voltage level is prefered to represent the two binary values, but sometimes, a positive voltage+zero voltage or a negative voltage+zero voltage also can be used.

NRZ encoding is a simple way for short-distance transmission, and in the earlier Halliburton DITS logging system, is employed in EXCELL-2K surface system to transmit information between DITS Modem Panel to Front-End.

2.  NRZ Inverted (NRZI)

Signals are represented in a different format in NRZI, 1s & 0s are determined by the voltage transition state at a clock leading boundary rather than the straight encoding in NRZ:

‘1′:  A physical voltage level transition happens over the last physical voltage level.

‘0′:  No physical voltage level transition happens over the last physical voltage level.

The defination of the binary can be swapped, depends on the implementation of the protocol.

The biggest advantage of detecting transition is that it is often less error-prone than comparing against a threshold in a noisy environment(The following encodings have the same property).

NRZI now is used in USB, 100Base-FX(Fast Ethernet) etc.

3.  Manchester Encoding (ME)

In Manchester Encoding, A falling or rising transition from one voltage level to another, in the middle of the bit-time, determines the binary value. Generally, Manchester signals are bi-polar in that one voltage is positive and the other voltage is negative. A binary 1 is designated has a falling transition from the positive voltage level, through zero, to the negative voltage level in the middle of the bit-time. Conversely, a binary zero is designated has a rising transition from the negative voltage level, through zero, to the positive voltage level in the middle of the bit-time. These transitions represent binary only when it occurs in the middle of the bit-time. Same as the NRZI, this defination can be swapped, depends on the implementation.

A Manchester encoded signal contains frequent level transitions which allow the receiver to extract the clock signal using a Digital Phase Locked Loop(DLLP), this makes the method suitable for use on single-core systems such as optical fiber and coaxial cable. The weakness compared with NRZ is the modulation bandwidth is twice that of NRZ and it needs complex decoding circuitry.

Manchester Encoding commonly accompanys with 1553 tool bus. In Halliburton older DITS logging system, 1553 tool bus is employed to transmit data between each logging tool and telemetry unit. One advantage of this bus is that entire telemetry system would not shutdown if one of the tools fail, as all devices are connected in parallel. Besides, the downlink commands of the logging system are transmitted in Manchester Format.

You are using Manchester Encoding too if you read this article through the internet (ME is widely used in ethernet).

4.  Differential Manchester Encoding (DME)

Differential Encoding(also known as CDP; Conditioned Diphase Encoding) is a technique that makes data to be transmitted not only depend on the current bit, but also the previous one. As implied in the name, DME is one type of Differential Encoding(NRZI too), a 1 is indicated by making the first half of the signal equ to last half of the previous signal, means no transition at the beginning of the bit-time; a 0 is indicated by making the first half of the signal opposite to the last half of the previous bit, means a transition from 0 to 1 or 1 to 0 happens at the start of the bit-time. In the middle of the bit-time, there is always a transition, this property makes it a single self-synchroizing data stream, which means clock signals are combined with the data signals.

DME is specified in the IEEE 802.5 standard for token ring LANs with twisted pair, and is used for many other applications, including magnetic and optical storage.

5. Unmodulated & Modulated Duo-Binary Encoding (UDBE & MDBE)

The value of Unmodulated Duo-Binary date depends on the voltage level, binary 0 is always the ground potential(0 volts), a binary 1 can either a positive voltage or negative voltage, depends on the number of 0s follows the previous binary 1. If a given polarity of a binary 1 is followed by an odd number of binary 0s, the next binary 1 will be of the opposite polarity. Consequently, if a given polarity of binary 1 is followed by an even number of binary 0s, then the next 1 will remain the same polarity.

In Modulated Duo-Binary, a 0 is indicated by a bit-time of ground potential(0 volts), a 1 is represented by one complete cycle of the clock signal. The number of 0s determines the polarity of the next binary 1. If a given phase of a binary 1 is followed by an odd number of 0s, the next binary 1 will be 180-degrees out of phase from the preceding binary 1. Therefore, if a given phase of binary 1 is followed by an even number of  0s, then the next 1 will be in phase with the preceding 1.

DBE and NRZ has a similar transmission properties, both are equally efficient for short distance. Since DBE is more resilient to dispertion(Simple to encode and decode is another advantage), it is a better choice for a long distance transmission than NRZ, which requires much more compensation and equalization.

一、准备工作
　　准备一个网络连接，在安装gentoo及软件的时候我们要用到网络。如果是gentoo新手，然后最好手边有一份gentoo安装手册，在本文中只简单介绍gentoo安装过程。
　　然后下载软件（不知道下载地址google之）：
　　１.　最新版的Gentoo minimal installation CD、Stage Tarball、Portage Snapshot，我用20090602的那个。
　　２.　下载光盘版本的BackTrack，我这里用BT4 Beta版。
　　３.　下载slax linux和puppy linux，然后各自解压到一文件夹下。
　　４.　下载MaxDOS v7.1光盘版。
　　５.　UltraISO，用来从ISO中提取文件。
　　６.　GDParam，用来获取磁盘镜像文件的c/h/s参数。
　　下载完成后将Gentoo Minimal Installaton CD刻盘。
二：提取DOS镜像
　　将下载的maxdos_71plus_iso.rar 解压得到maxdos_71plus_iso.iso，用UltraISO打开镜像文件，提取其中maxdos文件夹下面的maxs.sys文件。将maxs.sys改名为maxs.gz，用winrar打开解压出其中的maxdos.exe文件。最后将解压出的maxdos.exe改名为MaxDOS.img，这就是我们要用的DOS镜像，与上面下载好的软件一起保存好，在安装完gentoo后我们要把他们拷贝到U盘里。
三、安装gentoo
　　将U盘与gentoo安装盘插入计算机，从光驱启动。启动完成后将Ｕ盘分为一个区格式化ext3类型（请将以下命令中的U盘设备号以你自己系统做相应调整）：
　　１.　用fdisk命令将Ｕ盘所有分区删除，然后重新建立一个新分区，分区大小为全Ｕ盘大小：
　　　　#fdisk /dev/sda
　　　　Command (m for help): d
　　　　Partition number (1-?): 1
　　在command后面输入p可以查看当前分区状况，一般来说默认Ｕ盘只有一个分区，如果有多个分区再重复上面的命令，直到删除完为止。删除完以后新建一个主分区并将其设为可启动：
　　　　Command (m for help): n
　　　　p
　　　　Command (m for help): a
　　２.　格式化Ｕ盘为ext3:
　　　　#mkfs.ext3 /dev/sda1
　　下面可以按手册安装gentoo了，不过要注意的是，如果内存在1G以上我们就不用swap分区了（你也可以在Ｕ盘上再划出一个分区做为swap），并且boot分区也不用另分。还有就是我们使用gentoo的genkernel，这样Ｕ盘应当可以在不同的机子上使用（当然你也可以拷贝光盘里的内核）。
　　３.　gentoo基本系统安装：
　　　　dhcpcd eth0
　　　　mount /dev/sda1 /mnt/gentoo
　　　　mkdir /mnt/gentoo/boot
　　　　cd /mnt/gentoo
　　(挂载你下载gentoo stage/portage的windows分区，将stage/portage拷贝到当前目录即/mnt/gentoo下)
　　　　tar xvfp stage3-i686-20090602.tar.bz2
　　　　tar xvf portage-latest.tar.bz2 -C usr
　　　　mirrorselect -i -o >> etc/make.conf
　　　　mirrorselect -i -r -o >> etc/make.conf
　　　　cp -L /etc/resolv.conf etc/
　　　　mount -t proc none proc
　　　　mount -o bind /dev dev
　　　　chroot /mnt/gentoo /bin/bash
　　　　env-update
　　　　source /etc/profile
　　　　export PS1="(chroot) $PS1"
　　　　emerge –sync
　　　　(if a new portage version is available)  emerge –oneshot portage
　　　　(if you use vim) emerge vim
　　　　vim /etc/locale.gen
　　(add to the file):
　　　　　　zh_CN GB18030
　　　　　　zh_CN.UTF-8 UTF-8
　　　　　　zh_CN.GB2312 GB2312
　　　　　　zh_CN.GBK GBK
　　　　locale-gen
　　　　cp /usr/share/zoneinfo/Asia/Shanghai /etc/localtime
　　　　emerge gentoo-source
　　注意，下面的命令与手册上的不同，手册上说的默认的内核配置文件的路径应当是错的，正确的应当是下面命令中的那个路径。在执行前先备份：
　　（mv /usr/share/genkernel/arch/x86/kernel-config /usr/share/genkernel/arch/x86/kernel-config.bak）
　　　　zcat /proc/config.gz > /usr/share/genkernel/arch/x86/kernel-config
　　　　genkernel all
　　将在/boot目录下生成的kernel…与initramfs…名字记下或改个名，我改为vmlinuz和initramfs。
四、完善gentoo基本系统
　　在/etc/fstab中将根目录挂载如下，将其它的项注释掉：
　　　　/dev/sda1  / ext3 noatime 0 1
　　设置你喜欢的hostname：
　　　　vim /etc/conf.d/hostname
　　如果使用dhcp，并且开机要自动启用，将下一行加入/etc/conf.d/net：
　　　　config_eth0=("dhcp")
　　并执行：
　　　　rc-update add net.eth0 default
　　为系统设置密码：
　　　　passwd
　　其它相应的自己设置即可。
五、安装基本软件
　　一般来说要安装的软件有syslog-ng, slocate, reiserfsprogs, jfsutils, dhcpcd, ppp等，自己视情况emerge。
六、安装syslinux
　　　　emerge syslinux
　　安装完成以后将extlinux安装在目录/extlinux下：
　　　　cd /
　　　　mkdir extlinux
　　　　extlinux -i /extlinux
　　　　cd /usr/share/syslinux
　　在syslinux目录或子目录下找到mbr.bin，然后安装mbr：
　　　　cat mbr.bin > /dev/sda
　　然后在syslinux目录或子目录下面找到下面五个文件，复制到/extlinux/下：
　　　　memdisk
　　　　vesamenu.c32
　　　　menu.c32
　　　　chain.c32
　　　　reboot.c32
七、安装其它系统
　　１.　DOS
　　回到根目录，在根目录下新建文件夹命名为dos，将我们做好的MaxDOS.img文件放于此目录下。\
　　　　mkdir dos
　　　　cp /mnt/winfs/…/MaxDOS.img /dos/
　　２.　BackTrack
　　挂载我们下载回来的BackTrack的iso:
　　　　mount -o loop /mnt/winfs/…/bt4-beta.iso /mnt/cdrom
　　在根目录下新建文件夹/btboot，复制iso/boot/下面的vmlinuz, initrd.gz到/btboot，然后复制整个BT4文件夹到根目录，注意BT4文件夹不能改名字：
　　　　mkdir btboot
　　　　cp /mnt/cdrom/boot/vmlinuz /btboot/
　　　　cp /mnt/cdrom/boot/initrd.gz /btboot/
　　　　cp -pPr /mnt/cdrom/BT4 /
　　３.　slax
　　在根目录下新建文件夹/slaxboot，将slax/boot下的文件vmlinuz, initrd.gz复制到/slaxboot下，然后复制整个slax文件夹到根目录，注意slax文件夹不能改名字：
　　　　mkdir slaxboot
　　　　cp /mnt/winfs/…/slax/boot/vmlinuz /slaxboot/
　　　　cp /mnt/winfs/…/slax/boot/initrd.gz /slaxboot/
　　　　cp -r /mnt/winfs/…/slax/slax /
　　４.　puppy
　　将整个puppy文件夹复制到根目录下，可以将puppy目录下的[boot]文件夹删除：
　　　　cp /mnt/winfs/…/puppy /
　　　　rm -r /puppy/[boot]
八、完成extlinux配置
　　在目录/extlinux下新建文件extlinux.conf，其内容如下：

PROMPT 0
TIMEOUT 100
DEFAULT vesamenu.c32
MENU BACKGROUND splash.png

F1 readme.txt
F2 extlinux.conf
MENU WIDTH 80
MENU MARGIN 10
MENU ROWS 12
MENU TABMSGROW 18
MENU CMDLINEROW 18
MENU ENDROW -1
MENU PASSWORDROW 11
MENU TIMEOUTROW 20
MENU HELPMSGROW 22
MENU HELPMSGENDROW -1
MENU HIDDENROW -1
MENU HSHIFT 0
MENU VSHIFT 0
MENU COLOR border 0 #0000 #0000 none

MENU TITLE ’s Tool Box

LABEL gentoo
　　　　MENU LABEL ^Gentoo Linux
　　　　kernel /boot/vmlinuz
　　　　append initrd=/boot/initramfs ramdisk_size=8192 root=/dev/ram0 real_root=/dev/sda1 vga=0×318 rw
　　　　TEXT HELP
　　　　Gentoo Gen-Kernel 2.6.29…
　　　　ENDTEXT

LABEL bt
　　　　MENU LABEL ^BackTrack 4
　　　　kernel /btboot/vmlinuz
　　　　append initrd=/btboot/initrd.gz ramdisk_size=6666 root=/dev/ram0 rw vga=0×318 changes=/BT4/changes/

LABEL slax
　　　　MENU LABEL ^Slax v6.2
　　　　kernel /slaxboot/vmlinuz
　　　　append initrd=/slaxboot/initrd.gz ramdisk_size=6666 root=/dev/ram0 rw vga=0×318 changes=/slax/grach/ autoexec=xconf;telinit~4

LABEL slax-txt
　　　　MENU LABEL Slax v6.2 – Text Mode
　　　　kernel /slaxboot/vmlinuz
　　　　append initrd=/slaxboot/initrd.gz ramdisk_size=6666 root=/dev/ram0 rw vga=0×317 changes=/slax/txtch/

LABEL puppy
　　　　MENU LABEL ^Puppy Linux v4.2
　　　　kernel /puppy/vmlinuz
　　　　append initrd=/puppy/initrd.gz pmedia=cd

LABEL dos
　　　　MENU LABEL Max^DOS v7.1
　　　　kernel /extlinux/memdisk c=555 h=2 s=18 floppy
　　　　append initrd=/dos/MaxDOS.img

LABEL reboot
　　　　MENU LABEL ^Reboot
　　　　kernel /extlinux/reboot.c32

　　其中第四行menu background splash.png表明启动菜单的的背景图片为splash.png（保存于/extlinux下），它应当是一张640*480大小的png, jpg, gif, jmp格式图片。如果不喜欢可以将这一行去掉。
　　好了，到这里我们的整个系统就完成了，将所有挂载的系统umount，然后重启，将第一启动方式设置为USB-HDD方式，然后就可以看见可爱的extlinux启动界面了~~~
　　这样做出来的系统启动速度比光盘快多了，个人感觉与硬盘启动速度差不了多少，不过不知道以后用着会不会出什么问题。后面是一些我安装完成后的图片，是刚装完后半夜照的不是太清楚，呵呵，拿出来小秀一下，如果有什么问题及指正，请留言或写邮件到DarkThron@163.com，我的Blog: http://blog.donews.com/6lines，欢迎交流。

Menu:

gentoo:

BackTrack 4 :

BackTrack 4 – FVWM:

BackTrack 4 – FVWM:

BackTrack 4 – KDE:

Slax – Text Mode:

Slax:

Puppy:

DOS:

DOS – Ghost:

下载：　　Scripts Download

有问题可留言或邮件至：DarkThorn@163.com
　　　　
　　　　http://blog.donews.com/6lines

１.网上银行控件+IE7
　　登录工行个人版网上银行是要求先安装一个安全登录控件的，如果IE的版本是7.0或是更高安装完以后每打开一个页面在工具栏下面都会有一个"Your current security settings put your computer at risk[当前安全设置会使计算机有风险]"的安全提示。当然还有一种情况是安装完那个控件以后IE7的设置没有被改过来（所以没有那个提示），那么登录到网银以后会有一个ActiveX控件的提示，当你点那个允许选项的时候网银会自动退出。如果是这种情况，需要自己动手更改：Internet Options [Internet选项]-> Security [安全] -> Custom Level [自定义级别] 中将"Download signed ActiveX controls(not secure)[下载标识为安全的ActiveX控件]"选为"Enable(not secure)[启用]"，改过这个以后网银是可以正常使用了（如果还是不行请适当放宽IE关于ActiveX的设置），当然那个安全提示也就出来了。
　　但是怎么去掉那个烦人的安全提示呢？在网上搜一下有一种更改组策略的方法（运行 -> gpedit.msc -> Computer Configuration[计算机配置] -> Administrative Templates[管理模块] -> Windows Components[Windows组件] -> Internet Explorer，在右边的窗口中找到"Turn off security settings check[关闭安全设置检查功能]"策略项，双击此项打开属性对话框，在"Settings[设置]"选项中选择 "Enable[启用]"项），记得第一次用网银的时候用这种方法是可以的，可是这次公司的ghost系统里面根本就找不到那个项，没办法，只好找到组策略相应的键值更改注册表了（关闭IE）：
　　a.开始 -> 运行 -> regedit
　　b.到HKLM\Software\Policies\Microsoft\Internet Explorer\Security键下，如果这些键不存在，自己新建，在新建过程中注意大小写。
　　c.在上面的键下面新建一个双字（DWORD）型值项（Value Entry）：DisableSecuritySettingsCheck，赋于键值："1"（无引号）。同样，在新建值项的时候注意大小写。
　　打开IE后看看，是不是那个安全提示已经被去掉了？

２.Ｕ盾驱动
　　刚开始安装Ｕ盾的驱动程序就提示：对不起，本软件不支持你的操作系统。由于公司的操作系统都是英文版XP SP3，所以我以为是语言问题。于是在控制面版里的区域与语言选项里面将能改的选项都改为Chinese(PRC),然后重启，结果还是那个提示。难道是繁体中文不成？没关系，再试！更改选项，重启…又是那个提示。真搞不懂，icbc把软件不做成英文，不做成中文，难道还做成法文不成？应当不可能吧。看来只有霸王硬碰硬了，跳过那个setup的包装程序，直接到光盘里找驱动安装程序。打开光盘personal文件夹，除了那个setup.exe文件之外，还有两个可执行程序：SafeSign_ICBC_per.exe和Setup_per.exe，分别运行之… 看那个程序安装过程中的提示居然一个是SafeSign 2.0 for ICBC per，另一个是SafeSign 2.3 for ICBC per… 晕呢… 先不管，都装了再说（先2.0后2.3）… 打开网银插入Ｕ盾转账测试… 仍然提示没有Ｕ盾… 我的上帝耶稣马克思以及莎士比亚啊，装个这么个小软件你们都要玩死我啊…
　　没办法，知之为知之，不知google之… 网上有人说是那个光盘软件版本太老，应当在icbc网上下载驱动。暂且先试试吧，在网上点个人网银登录后弹出的那个页面中找到相应的驱动，下载安装…进入网银以后…提示找不到Ｕ盾~~~看来驱动还是没有被正确安装。
　　没办法，看来网上下的那个驱动也是有点问题的。突然想想光盘里面也有一个2.3版本的驱动，是不是网上下的那个少点东西？把刚才安装的驱动、控件全部卸载，重启。然后安装登录控件，再安装从网上下载的那个驱动，然后再到光盘目录下面安装那个Setup_per.exe（修复）… 登录，转账… 哈，居然成功了？
　　后来看了一下，从网上下载的那个驱动原本光盘里面的那个Setup_per.exe大小版本也都是一样的，理论上来说不应该安装两次的。猜想是不是先前单独安装光盘里面的程序对网上下载的驱动有影响？那么是不是刚一开始就安装网上的控件和驱动就可以了？如果有人一开始只下载网上的驱动就成功的麻烦留个言交流一下。

记得小苹初见，两重心字罗衣。
琵琶弦上说相思，当时明月在，曾照彩云归。

【注释】：
　　①春恨：春日离别的情思。却来：又来。
　　②小苹：是晏几道朋友家歌女的名字。
　　③彩云：这里指小苹。