About Internet Junction's K56flex Support

IJC subscribers will experience higher connect speeds for faster file transfers and reduced latency when surfing the net. The following FAQ shares insight on what to expect from this technology. What is required?
 What 56Kbps modem technology does Internet Junction use?
    Our terminal servers use the K56flexTM technology developed jointly by LucentTM and RockwellTM.

What kind of performance can I expect with K56flex?
    Internet Junction has a completely digital path to our provider. Therefore, our terminal servers (modem pools) experiences none of the telephone line impairments generally associated with analog modems, and can transmit data at the highest possible K56flex connect rates.

    However, client K56flex modems have to operate with the traditional analog local loop which has been optimized for voice traffic. This optimization actually impedes data traffic, and client K56flex modems must now be responsible for compensating for the telco's human speech optimization of a voice call. Client K56flex modems must be intelligent enough to differentiate between the maximum signal levels (up to 255 discrete levels) of a K56flex connection, synchronize with the local telco switch, compensate for digital loss, determine if voice PADs are present, and handle whatever noise is present on the phone line. For all of these reasons, it is the client K56flex modem that ultimately determines the maximum downstream connect speed.

    Because K56flex modems operate asymmetrically, users will generally see a downstream speed of 40-50Kbps and a maximum upstream of V.34 speeds.
Does K56flex provide 56Kbps in both directions?
    K56flex is asymmetrical. It provides speeds up to 56Kbps in the downstream, and speeds of up to 33.6Kbps (V.34) in the upstream.

What client modems support 56Kbps operation? Does K56flex provide data compression?
    No, but our terminal servers support V.42bis data compression.
Can I use US Robotics X2 client-modems?
    Yes, at any ITU-T standard up to V.34 (33.6Kbps). However, because X2 is a US Robotics proprietary protocol, it will only operate at 56Kbps with X2 USR devices.
When do you expect the ITU-T 56Kbps modem standard to be announced?
    The ITU-T standard is V.90.
Will Internet Junction support the ITU-T 56Kbps standard?
    Yes, we've already made arrangements with the manufacturer of our terminal servers to guarantee ITU-T 56K compatability when the revision becomes available to us.
Which modems have been tested for interoperability?
    1. Zoom/FaxModem 56Kx
      - Firmware V1.0-56K_DLS

    2. Motorola ModemSurfr K56
      - Firmware V1.0-56K_DLS

    3. Hayes Accura 56K + FAX
      - Firmware V1.0-56K_DLS

    4. SuperExpress 288 PnP
      - Firmware V1.200-07-V34_DS Built July 18 1995

    5. Practical Peripherals PM28800MT
      - Firmware 1.63

    6. Zoom V.34 plus
      - Firmware V.1500 -V34_DS -a Z201

    7. Practical Peripherals PM14400FXMT
      - Firmware 2.17

    8. BocaModem V.34+
      - Firmware V1.510-V34_DS

    9. Gateway 2000 Telepath 14.4k, Made by USR
      - Firmware Supervisor 4.1, 6/27/94, DSP 10, 4/20/94

    10. USR sportster 28.8
      - Firmware Supervisor 6.0, 12/19/94, DSP 11.4 12/09/94

    11. MicromCom 33.6k OfficePorte Voice
      Same modem we send to customers as replacement.

    12. Zoltrix V.34+ Fax Modem
      - Firmware V2.061 US001-V34_ACF_DP1

    13. USR 33600 Fax modem Internal
      - Firmware EPROM 10.0.23 12/10/96 DSP 10.0.23 12/10/96

    14. Cardinal Internal V34+
      - Firmware V1.50-V34+DP Data/Fax

    15. USR Sportster 14.4
      - Firmware Supervisor 4.1, 6/27/94, DSP 10, 4/20/94
      - Firmware Supervisor 4.1, 11/16/93,DSP 10, 11/16/93

    16. Gateway Telepath Internal
      - Firmware 1.5 000

    17. Intel 144 _144e _Internal 14.4k as well
      - Firmware V1.7 Rockwell RC144DP

    18. USR V34+ Internal
      - Firmware EPROM 3.12 8/16/96 DSP 3.12 8/16/96

    19. Some Rockwell based V34+ modem
      - Firmware V1.500-V34_DP -a Z201

    20. Gateway 2000 Telepath II 14.4k/Fax V5.2 / USR
      - Firmware Supervisor 5.2 12/09/94 DSP 11.2 09/07/94

    21. USR 33.6 V32bis, VFC, V.34+
      - Firmware 2.0 1/11/96

    22. Texas Instruments RK 33600 Internal / USR Modem
      - Firmware EPROM 1.4 11/22/95 DSP 1.4 11/22/95

    23. Prometheus 14.4k RC140DPi Rev CA
      - Firmware CES-03B- 940315

    24. SupraExpress 336 PC
      - Firmware V1.440-16-V34_DS Built: July 22, 1996 11:15:10

    25. Microcom DeskPorte Fast ES 28.8
      - Firmware V1.000-CS39 VFC RC288Dpi Rev 05BA
      - Note Fastest Connect rate 14.4k, V.FC not supported

    26. Motorola UDS
      - Firmware 1.03.03

    27. IBM Mwave Internal modem
How can I get my K56flex client modem upgraded?