ADTRAN 1200263L1-1.2A user manual Arp, Becn, Cir, Dhcp, Did, Dlci

Appendix A Glossary

A-Law

PCM coding method as defined by the ITU-T. It is a companding standard for converting between analog and digital in a PCM system. A-Law is mainly used in Europe. MU-Law is the North Ameri- can equivalent.

ANSI T1.617-D (Annex D)

See Annex D.

Annex D

Standard for frame relay signaling as defined by the American National Standards Institute (ANSI) in publication T1.617-D.

Annex A

Standard for frame relay signaling as defined by the International Telecommunication Union Telecom- munication in publication Q.933-A.

ARP

Address Resolution Protocol. A protocol that maps an IP address to an ethernet MAC address.

BECN

Backward Explicit Congestion Notification. Sent to the device generating excessive frame relay traffic as a means to slow down the flow of data to the network. Compare with FECN.

CIR

Committed Information Rate. The guaranteed bandwidth available for customer data under normal circumstances.

DHCP

Dynamic Host Configuration Protocol. Allows dynamic IP address allocation.

DID

Direct Inward Dial. Digits received or transmitted that allow the attached equipment to further route a call.

Discard Eligible (DE)

A flag that can be set to indicate to the network that if excess traffic is received this frame can be dis- carded if necessary.

DLCI

Data Link Connection Identifier. Identifies each virtual circuit within a shared physical channel.

61200263L1-1.2A ATLAS Router User Manual A-1