Allied Telesis AT-8202 - Manual (Page 75)

A-1
Appendix A
ATM Acronyms and Terms
This appendix lists and defines ATM acronyms and terms used in this
guide. For a more comprehensive list of ATM acronyms, visit the ATM
Forum website at www.atmforum.com.
For other terms commonly used in Allied Telesyn publications, refer
also to the glossary in Allied Telesyn’s website at
www.alliedtelesyn.com.
AAL (ATM adaptation
layer) The layer in the ATM model that provides the protocol between
packet services and any ATM cell-oriented switching devices. The
services primarily consist of segmentation and reassembly of data
into multiple 48-byte cells.
Asynchronous A method of transmission in which the time intervals between
characters are not required to be equal and signals are sourced from
independent clocks with different frequencies and phase
relationships. Start and stop bits are added to coordinate character
transfer.
ATM layer The layer in the ATM model above the physical layer responsible for:
cell multiplexing; virtual path identifier and virtual channel
identifier translation; cell header generation and extraction; and
generic flow control.
CIP (classical IP) RFC 1577 specifies how to carry IP datagrams over the ATM network.
It specifies the format of the ATM ARP requests and replies over the
ATM AAL5 layer. It also defines the role and the protocol operation
of the ATM ARP server, and the use of ATM ARP to resolve IP
addresses from ATM addresses and ATM VCI values.
RFC 1483 allows the multiplexing of multiple families of PDUs over
the same VCI, and the protocol is identified by prefixing the PDU by