What is the size of the CDPD Market in the US?

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Request for Question Clarification by claudietta-ga on 26 Sep 2002 22:44 PDT

What is CDPD?  What does it stand for?

Claudietta

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Clarification of Question by dkrikac-ga on 27 Sep 2002 18:15 PDT

What is CDPD?

CDPD (Cellular Digital Packet Data) is a specification for supporting
wireless access to the Internet and other public packet-switched
networks. Cellular telephone and modem providers that offer CDPD
support make it possible for mobile users to get access to the
Internet at up to 19.2 Kbps . Because CDPD is an open specification
that adheres to the layered structure of the Open Systems
Interconnection (OSI) model, it has the ability to be extended in the
future. CDPD supports both the Internet's IP protocol and the ISO
Connectionless Network Protocol (CLNP).

CDPD also supports IP multicast (one-to-many) service. With multicast,
a company can periodically broadcast company updates to sales and
service people on the road or a news subscription service can transmit
its issues as they are published. It will also support the next level
of IP, IPv6.

For the mobile user, CDPD's support for packet-switching means that a
persistent link isn't needed. The same broadcast channel can be shared
among a number of users at the same time. The user's modem recognizes
the packets intended for its user. As data such as e-mail arrives, it
is forwarded immediately to the user without a circuit connection
having to be established. There is a circuit-switched version, called
CS CDPD, that can be used where traffic is expected to be heavy enough
to warrant a dedicated connection.

Most of today's Law Enforcement Community uses this protocol to run
plates from their cars when they pull you and I over.....