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AO/DI: Always On/Dynamic ISDN:

AO/DI is a permanent connection to your ISP via the ISDN D-channel. Using the X.25 protocol at roughly 9600bit/s worth of throughput, users can send and receive low bandwidth traffic without ever having to bring up a B-channel. When more bandwidth required (user settable), BACP protocol negotiation from either the ISP or the end-user's ISDN equipment will bring up either (1) or (2) additional B-channels as necessary.

What is needed to support AO/DI?

End-User:
• A standard provisioned ISDN BRI line
• X.25 over the D-channel extra provisioning
• A ISDN T/A or router that supports AO/DI, BACP, and X.25

ISP:

• One or more ISDN B-channel(s) on a BRI or PRI line provisioned for X.25
NOTE: Most RBOCs don't allow provisioning X.25 on a PRI's existing 64K D-channel so you'll need to chew up a B-channel for this.
• Upgraded code on your ISDN terminal server / router to support BACP, AO/DI, and X.25 routing

VIA: Vendors' ISDN Association: white papers, presentations, etc
Pacific Bell's Press Release on AO/DI

Advanced Computer Communications (ACC)
Check out ACC's Press Release on shipping AO/DI in July, 1997

Ascend

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Last Updated: 10/29/97 3:20pm

[ HOME ] [ Linux ] [ RAS ] [ Networks ] [ PC Hardware ] [ ISDN ] [ Cablemodems ] [ Eval ISPs ] [ Security ] [ Trinity Designs ] [ Who am I ] [ Bookmarks ] [ ChangesLog ] [ Email me ] [ --- ] [ Search! ]