ISDN Bandwidth Capabilities of Windows NT

 Last reviewed: December 30, 1997
Article ID: Q133704
The information in this article applies to:
  • Microsoft Windows NT Workstation versions 3.5, 3.51, and 4.0
  • Microsoft Windows NT Server versions 3.5, 3.51, 4.0

SUMMARY

PPP Multilink Protocol (PPP MP) is a technology that provides up to 128 kilobytes per second (kb/s) wire speeds on a single ISDN line by combining two B-channel calls. Each B-channel provides a 64 kb/s link.

Microsoft supports Multilink Protocol starting with NT 4.0 and RAS.

MORE INFORMATION

Channel Aggregation is a proprietary method designed by Digi International (the makers of Digiboard) that allows speeds greater than 64 kb/s using 2 B- channels. To attempt to use speeds greater than 64kb/s, use one of the following methods:

Windows NT version 3.5x

Modify the phone book entry by editing the entry, clicking the ISDN button, and entering 2 in the Channels to Use category.

Windows NT version 4.0

  1. In Dial-Up Networking, click More, click Edit entry and modem properties.

  2. Select Multiple Lines in the Dial using drop down list.

  3. Click Configure and enter a phone number for each line which you are using.

For more technical information on the PPP Multilink Protocol, see RFC 1717. This RFC can be found on the World Wide Web at: 

   http://www.cis.ohio-state.edu/htbin/rfc/rfc1717.html
For more general information regarding the PPP Multilink protocol or ISDN, connect to one of the following World Wide Web sites:

KBCategory: kbnetwork
KBSubcategory: ntras
Additional reference words: 3.50 3.51 prodnt
Keywords : ntras kbnetwork
Version : 3.50 3.51 4.00
Platform : WINDOWS

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Last reviewed: December 30, 1997
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