CDPD (Cellular Digital Packet Data)

A method for data transmission over analog Advanced Mobile

Phone System (AMPS) cellular radio networks. CDPD takes advantage of the natural idleness between disconnections and connections during the break and make process to transmit packetized data at rates up to 19.2 kbps, using either the Internet Protocol (IP) or the ISO Connectionless Network Protocol (CLNP).

The frequency-agile CDPD modems search for available channels over which to send encrypted packets during the periods of channel idleness. Ultimately, CDPD proved too complex, too bandwidth-limited, and too expensive, especially as data-ready 2.5G and 3G networks made their appearances and analog cellular networks were phased out.The last of the CDPD networks were decommissioned around the end of 2005. See also AMPS, analog, break and make, cellular radio, CLNP, encryption, IP, ISO, and modem.

• 10 Gigabit Ethernet (IEEE 802.3ae) Media Specifications
• 10GigE (10 Gbps Ethernet)
• 10XXX
• 11
• 12
• 128-QAM
• 13
• 1394
• 1/3 FEC
• 14
• 15
• 1.5-way paging
• 16
• 16-QAM
• 16-QPSK
• 18
• 1:8 Splitter
• 1A
• 1A1
• 1A2
• 1Base5 (1 Mbps; Baseband; 500 meters)
• 1B+D
• 1. Domain Name System. The naming convention that divides the Internet into logical domains identified in Internet Protocol version 4 (IPv4) as a 32-bit portion of the total address.The standard convention is user@organization.domain, where user is the name of the end user, organization is the name of the enterprise or other organization owning or sponsoring the address, and domain is the type of entity owning or sponsoring the address.The administration of the DNS is the responsibility of Internet Corporation for Assigned Names and Numbers (ICANN). See also domain, ICANN, Internet, and IPv4. 2.
• 1. In storage, irrelevant material, usually zero (0) bits, added to a data block in order to fill it to a minimum size, to force certain fields of control data or user data into certain positions or sizes, or to prevent the user data from duplicating a bit pattern that has a specific control meaning. See also block. 2.
• 1 cps, 1 Hz