2.Aztech 900E(B)2 ADSL Ethernet Modem Serial Number: ACSC31000124,ACSC30700214,ACSC30700628,ACSC30700652,ACSC24601549,ACSC31001079,ACSC30700910 Firmware: 13.2.3 and 13.2.5 (Updated) Made in China
3.D-Link DSL-1500G (SHDSL) Serial Number: 00055D76A852 Firmware: N/A Made in Taiwan
4.D-Link DSL-500G Serial Number: N/A (Special Unit) Firmware: Special Firmware from Taiwan (For testing purposes) Made In Taiwan
5.D-Link DSL-300G Serial Number: N/A (Special Unit) Firmware: Special Firmware from Taiwan (For testing purposes) Made In Taiwan
6.Aztech 906EU Easy Serial Number: N/A (Special Unit) Firmware: Special Firmware for testing purposes Made In Taiwan
7.D-Link DSL-2001 Serial No: J25C131003477,H25C133000078 Ver:A1 Made in Taiwan
8.Hyundai Hase-220 - Ethernet Serial number : G02A13570, G02A05518 Firmware: N/A
There are several forms of xDSL, each designed around specific goals and needs of the marketplace. Some forms of xDSL are proprietary, some are simply theoretical models and some are widely used standards. They may best be categorized within the modulation methods used to encode data. Below is a brief summary of some of the known types of xDSL technologies.
ADSL Asymmetric Digital Subscriber Line (ADSL) is the most popular form of xDSL technology. The key to ADSL is that the upstream and downstream bandwidth is asymmetric, or uneven. In practice, the bandwidth from the provider to the user (downstream) will be the higher speed path. This is in part due to the limitation of the telephone cabling system and the desire to accommodate the typical Internet usage pattern where the majority of data is being sent to the user (programs, graphics, sounds and video) with minimal upload capacity required (keystrokes and mouse clicks). Downstream speeds typically range from 768 Kb/s to 9 Mb/s Upstream speeds typically range from 64Kb/s to 1.5Mb/s.
ADSL Lite (see G.lite)
CDSL Consumer Digital Subscriber Line (CDSL) is a proprietary technology trademarked by Rockwell International.
CiDSL Globespan's proprietary, splitterless Consumer-installable Digital Subscriber Line (CiDSL).
EtherLoop EtherLoop is currently a proprietary technology from Nortel, short for Ethernet Local Loop. EtherLoop uses the advanced signal modulation techniques of DSL and combines them with the half-duplex "burst" packet nature of Ethernet. EtherLoop modems will only generate hi-frequency signals when there is something to send. The rest of the time, they will use only a low-frequency (ISDN-speed) management signal. EtherLoop can measure the ambient noise between packets. This will allow the ability to avoid interference on a packet-by-packet basis by shifting frequencies as necessary. Since EtherLoop will be half-duplex; it is capable of generating the same bandwidth rate in either the upstream or downstream direction, but not simultaneously. Nortel is initially planning for speeds ranging between 1.5Mb/s and 10Mb/s depending on line quality and distance limitations.
G.lite A lower data rate version of Asymmetric Digital Subscriber Line (ADSL) was been proposed as an extension to ANSI standard T1.413 by the UAWG (Universal ADSL Working Group) led by Microsoft, Intel, and Compaq. This is known as G.992.2 in the ITU standards committee. It uses the same modulation scheme as ADSL (DMT), but eliminates the POTS splitter at the customer premises. As a result, the ADSL signal is carried over all of the house wiring which results in lower available bandwidth due to greater noise impairments. Often a misnomer, this technology is not splitterless per se. Instead of requiring a splitter at customer premises, the splitting of the signal is done at the local CO.
G.shdsl G.shdsl is an ITU standard which offers a rich set of features (e.g. rate adaptive) and offers greater reach than many current standards. G.shdsl also allows for the negotiation of a number of framing protocols including ATM, T1, E1, ISDN and IP. G.shdsl is touted as being able to replace T1, E1, HDSL, SDSL HDSL2, ISDN and IDSL technologies.
HDSL High Bit-rate Digital Subscriber Line (HDSL) is generally used as a substitute for T1/E1. HDSL is becoming popular as a way to provide full-duplex symmetric data communication at rates up to 1.544 Mb/s (2.048 Mb/s in Europe) over moderate distances via conventional telephone twisted-pair wires. Traditional T1 (E1 in Europe) requires repeaters every 6000 ft. to boost the signal strength. HDSL has a longer range than T1/E1 without the use of repeaters to allow transmission over distances up to 12,000 feet. It uses pulse amplitude modulation (PAM) on a 4-wire loop.
HDSL2 High Bit-rate Digital Subscriber Line 2 was designed to transport T1 signaling at 1.544 Mb/s over a single copper pair. HDSL2 uses overlapped phase Trellis-code interlocked spectrum (OPTIS).
IDSL ISDN based DSL developed originally by Ascend Communications. IDSL uses 2B1Q line coding and typically supports data transfer rates of 128 Kb/s. Many end users have had to suffice with IDSL service when full speed ADSL was not available in their area. This technology is similar to ISDN, but uses the full bandwidth of two 64 Kb/s bearer channels plus one 16 Kb/s delta channel.
MDSL Usually this stands for multi-rate Digital Subscriber Line (MDSL). It depends on the context of the acronym as to its meaning. It is either a proprietary scheme for SDSL or simply a generic alternative to the more common ADSL name. In the former case, you may see the acronym MSDSL. There is also another proprietary scheme which stands for medium-bit-rate DSL. Confused yet?
RADSL Rate Adaptive Digital Subscriber Line (RADSL) is any rate adaptive xDSL modem, but may specifically refer to a proprietary modulation standard designed by Globespan Semiconductor. It uses carrierless amplitude and phase modulation (CAP). T1.413 standard DMT modems are also technically RADSL, but generally not referred to as such. The uplink rate depends on the downlink rate, which is a function of line conditions and signal to noise ratio (SNR).
SDSL Symmetric Digital Subscriber Line (SDSL) is a 2-wire implementation of HDSL. Supports T1/E1 on a single pair to a distance of 11,000 ft. The name has become more generic over time to refer to symmetric service at a variety of rates over a single loop.
UDSL Universal DSL. See G.lite.
VDSL Very High Bit-rate Digital Subscriber Line (VDSL) is proposed for shorter local loops, perhaps up to 3000 ft. Data rates exceed 10 Mb/s.
DSL an Acronym for Digital Subscriber Line. The technology was developed in 1988 and to complete Understand how the technology works read all the details From this Site How DSL Works
An acronym for Digital Subscriber Line Access Multiplexer. Usually located in the CO or Central Office, it's the piece of equipment that makes DSL possible. The DSLAM connects many customer lines to one high-speed Internet access point.
CO is an acronym for Central Office. A physical building where the local telephone switching equipment is located. Lines running from a subscriber's home connect at their local central office.
An acronym for it is Remote Terminal, Also known as Remote DSLAM. Its a piece of equipment that is Placed after the reach of DSLAM in the CO max out.It could be thought as an DSLAM extension.
Error Messages ------------------------------- 600 An operation is pending. 601 The port handle is invalid. 602 The port is already open. 603 Caller's buffer is too small. 604 Wrong information specified. 605 Cannot set port information. 606 The port is not connected. 607 The event is invalid. 608 The device does not exist. 609 The device type does not exist. 610 The buffer is invalid. 611 The route is not available. 612 The route is not allocated. 613 Invalid compression specified. 614 Out of buffers. 615 The port was not found. 616 An asynchronous request is pending. 617 The port or device is already disconnecting. 618 The port is not open. 619 The port is disconnected. 620 There are no endpoints. 621 Cannot open the phone book file. 622 Cannot load the phone book file. 623 Cannot find the phone book entry. 624 Cannot write the phone book file. 625 Invalid information found in the phone book. 626 Cannot load a string. 627 Cannot find key. 628 The port was disconnected. 629 The port was disconnected by the remote machine. 630 The port was disconnected due to hardware failure. 631 The port was disconnected by the user. 632 The structure size is incorrect. 633 The port is already in use or is not configured for Remote Access dialout. 634 Cannot register your computer on the remote network. 635 Unknown error. 636 The wrong device is attached to the port. 637 The string could not be converted. 638 The request has timed out. 639 No asynchronous net available. 640 A NetBIOS error has occurred. 641 The server cannot allocate NetBIOS resources needed to support the client. 642 One of your NetBIOS names is already registered on the remote network. 643 A network adapter at the server failed. 644 You will not receive network message popups. 645 Internal authentication error. 646 The account is not permitted to log on at this time of day. 647 The account is disabled. 648 The password has expired. 649 The account does not have Remote Access permission. 650 The Remote Access server is not responding. 651 Your modem (or other connecting device) has reported an error. 652 Unrecognized response from the device. 653 A macro required by the device was not found in the device .INF file section. 654 A command or response in the device .INF file section refers to an undefined macro 655 The macro was not found in the device .INF file section. 656 The macro in the device .INF file section contains an undefined macro 657 The device .INF file could not be opened. 658 The device name in the device .INF or media .INI file is too long. 659 The media .INI file refers to an unknown device name. 660 The device .INF file contains no responses for the command. 661 The device .INF file is missing a command. 662 Attempted to set a macro not listed in device .INF file section. 663 The media .INI file refers to an unknown device type. 664 Cannot allocate memory. 665 The port is not configured for Remote Access. 666 Your modem (or other connecting device) is not functioning. 667 Cannot read the media .INI file. 668 The connection dropped. 669 The usage parameter in the media .INI file is invalid. 670 Cannot read the section name from the media .INI file. 671 Cannot read the device type from the media .INI file. 672 Cannot read the device name from the media .INI file. 673 Cannot read the usage from the media .INI file. 674 Cannot read the maximum connection BPS rate from the media .INI file. 675 Cannot read the maximum carrier BPS rate from the media .INI file. 676 The line is busy. 677 A person answered instead of a modem. 678 There is no answer. 679 Cannot detect carrier. 680 There is no dial tone. 681 General error reported by device. 682 ERROR WRITING SECTIONNAME 683 ERROR WRITING DEVICETYPE 684 ERROR WRITING DEVICENAME 685 ERROR WRITING MAXCONNECTBPS 686 ERROR WRITING MAXCARRIERBPS 687 ERROR WRITING USAGE 688 ERROR WRITING DEFAULTOFF 689 ERROR READING DEFAULTOFF 690 ERROR EMPTY INI FILE 691 Access denied because username and/or password is invalid on the domain. 692 Hardware failure in port or attached device. 693 ERROR NOT BINARY MACRO 694 ERROR DCB NOT FOUND 695 ERROR STATE MACHINES NOT STARTED 696 ERROR STATE MACHINES ALREADY STARTED 697 ERROR PARTIAL RESPONSE LOOPING 698 A response keyname in the device .INF file is not in the expected format. 699 The device response caused buffer overflow. 700 The expanded command in the device .INF file is too long. 701 The device moved to a BPS rate not supported by the COM driver. 702 Device response received when none expected. 703 ERROR INTERACTIVE MODE 704 ERROR BAD CALLBACK NUMBER 705 ERROR INVALID AUTH STATE 706 ERROR WRITING INITBPS 707 X.25 diagnostic indication. 708 The account has expired. 709 Error changing password on domain. 710 Serial overrun errors were detected while communicating with your modem. 711 RasMan initialization failure. Check the event log. 712 Biplex port is initializing. Wait a few seconds and redial. 713 No active ISDN lines are available. 714 Not enough ISDN channels are available to make the call. 715 Too many errors occurred because of poor phone line quality. 716 The Remote Access IP configuration is unusable. 717 No IP addresses are available in the static pool of Remote Access IP addresses. 718 PPP timeout. 719 PPP terminated by remote machine. 720 No PPP control protocols configured. 721 Remote PPP peer is not responding. 722 The PPP packet is invalid. 723 The phone number, including prefix and suffix, is too long. 724 The IPX protocol cannot dial-out on the port because the computer is an IPX router. 725 The IPX protocol cannot dial-in on the port because the IPX router is not installed.. 726 The IPX protocol cannot be used for dial-out on more than one port at a time. 727 Cannot access TCPCFG.DLL. 728 Cannot find an IP adapter bound to Remote Access. 729 SLIP cannot be used unless the IP protocol is installed. 730 Computer registration is not complete. 731 The protocol is not configured. 732 The PPP negotiation is not converging. 733 The PPP control protocol for this network protocol is not available on the server. 734 The PPP link control protocol terminated.. 735 The requested address was rejected by the server.. 736 The remote computer terminated the control protocol. 737 Loopback detected.. 738 The server did not assign an address. 739 The remote server cannot use the Windows NT encrypted password. 740 The TAPI devices configured for Remote Access failed to initialize or were not installed correctly. 741 The local computer does not support encryption. 742 The remote server does not support encryption. 743 The remote server requires encryption. 744 Cannot use the IPX net number assigned by the remote server. Check the event log. 752 A syntax error was encountered while processing a script. 769 The specified destination is not reachable