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A. It will work on both local and long distance calls, depending upon the

network interconnection. See our white paper for more details.

Q. Can any two modems incorporating this technology connect at 56 Kbps?

A. Yes, if one is a central site modem with a digital connection to the
network.

On the other hand two end user modems incorporating this technology will
not connect using this technique. Furthermore, 56 Kbps speeds can only be
achieved on good line conditions.

Q. Will this technology be backward compatible with existing modems already
installed?

A. Products incorporating this new technology will also contain all
previous modem modulations, including V.34, V.32bis, and facsimile
modulations. During the initial stages of a connections the two modems will
determine what modulation and at what speed the transmission will occur.

Q. What standards organizations will be involved, if any, in addition to

the ITU?

A. The ITU sets international standards and thus would be the preferred

standards body for this technology.

Q. What do you mean in your news release by "bridge the gap" between
current analog transmission rates and fully digital communication?

A. ISDN, which provides two 64 Kbps channels, has not still not achieved a

significant penetration in the home market. This technology will allow

users to gain the speed advantages of almost one ISDN channel without
having to order and pay for a new ISDN telephone line.

Q. Does the phone company need to install new equipment?

A. No. The use of this technique will be transparent to existing phone
company equipment.

Q. Does the user need new equipment?

A. The user must have a modem which implements this new technology.

Q. Does the ISP need new equipment?

A. Yes, the ISP must install modems which support this technique.
Additionally, the ISP must utilize a digital connection to the network.

Q. Standardization efforts aside, will Rockwell's 56Kbps technique

interoperate with US Robotics' pending solution?

A. The approaches used by the two companies could be quite different,
possibly precluding interoperability. Rockwell intends to submit its
technology to the appropriate standards bodies. The ratified specification
will serve as a worldwide interoperability vehicle.

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                         Marketing/business issues

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Q. With an early announcement, Rockwell appears to be taking the
opportunity to "evangelize" the technology before a product is ready to
ship. This is not Rockwell's usual "M.O.", why now, with this technology?

A. It takes time to educate people about this new technology and for

central site equipment providers to incorporate the technology into their


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