Cisco Cisco Access Registrar 3.5 - Manual (Page 67)

GL-1
Cisco Access Registrar 3.5 Concepts and Reference Guide
OL-2683-02
G L O S S A R Y
A
Access point A device that bridges the wireless link on one side to the wired network on the other.
Analog Channel A circuit-switched communication path intended to carry 3.1 KHz audio in each direction.
ARP Address Resolution Protocol is the TCP/IP protocol that translates an Internet address into the
hardware address of a network interface card.
ATM Asynchronous Transfer Mode is a virtual circuit, fast packet technology. Traffic of all kinds (data,
voice, video) is divided into 53-byte cells and conducted over very high speed media.
ATO Adaptive Time Out is the time that must elapse before an acknowledgment is considered lost. After a
time out, the sliding window is partially closed and the ATO is backed off.
C
Call A connection or attempted connection between two terminal end points on a PSTN or ISDN; for
example, a telephone call between two modems.
CHAP Challenge Authentication Protocol is a PPP cryptographic challenge/response authentication protocol
in which the clear text password is not passed in the clear over the line.
CLID Calling Line ID indicates to the receiver of a call, the phone number of the caller.
CM Cable Modem is usually a modem with an RF (cable) interface on one side and an Ethernet interface
on the other. A cable modem might also have a telephone interface for “telco return,” which is used
when only downstream capability exists in the cable plant.
CNR Cisco Network Registrar—A network management application which includes a DHCP server and a
DNS server.
Community String A string used to authenticate the trap message sender (SNMP agent) to the trap recipient (SNMP
management station).
Control Messages Control messages are exchanged between LAC, LNS pairs, and operate in-band within the tunnel
protocol. Control messages govern aspects of the tunnel and sessions within the tunnel.
CSG Cable Systems Group is a billing systems company.
CSR Customer Service Representative—the person you call to activate or obtain service for your account.