DSU

Glossary

DSU

Data service unit.

DTDM

Digital-terminal data module.

DTE

Data-terminal equipment.

EE-1

A digital transmission link with a capacity of 2.048 Mbps (2,048,000 bits per second). The European equivalent of the T-1. It can support 30 multiplexed

64-Kbps voice and data channels plus separate 64-Kbps channels for signalling and framing (synchronization). Also spelled E1.

EIA

See Electronics Industries Association (EIA).

EIA-232

A physical interface specified by the EIA. EIA-232 transmits and receives asynchronous data at speeds of up to 19.2 kbps over cable distances of up to 50 feet. EIA-232 replaces RS-232 protocol in some DEFINITY applications.

electronic tandem network (ETN)

Atandem tie-trunk network that has automatic call-routing capabilities based on the number dialed and the most preferred route available. Each switch in the network is assigned a unique private network office code (RNX), and each voice terminal is assigned a unique extension.

Electronics Industries Association (EIA)

A trade association of the electronics industry that establishes electrical and functional standards.

Ethernet

A local area network (LAN) that works over short distances on twisted-pairs or coaxial cables at speeds up to 10 mbps or 100 mbps. One of the two LAN protocols MMCX supports. See ATM, LAN emulation (LANE).

Ethernet Source Address

A 48-bit physical address of the NIC; also called the MAC address.

ETN

Electronic tandem network

 

 

Administration for Network Connectivity

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CID: 77730

555-233-504 — Issue 1 — April 2000

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Lucent Technologies Release 8.2 manual Dsu, Dtdm, Dte, Eia, Etn