Panasonic 1200N User Manual

Constant Bit Rate: An ATM service category which supports a constant or 
guaranteed rate to transport services such as video or voice as well as circuit 
emulation which requires rigorous timing control and performance parameters. 

Comite Consutarif International Telegraphique at Telephonique: The Consultive 
Committee on International Telegraph and Telephony.The CCIT is known as the 
ITU-T (International Telecommunications Union Telecommunications Services 
Sector), based in Geneva Switzerland.The scope of its work is now much broader 
than just telegraphy and telephony.It now also includes telematics, data, new 
services, systems and networks (like ISDN).

Current Cell Rate: The Current Cell Rate is an RM-cell field set by the source to 
its current ACR when it generates a forward RM-cell. This field may be used to 
facilitate the calculation of ER, and may not be changed by network elements. CCR 
is formatted as a rate. 

Common Channel Signaling: A form signaling in which a group of circuits share a 
signaling channel. Refer to SS7. 

Cutoff Decrease Factor: CDF controls the decrease in ACR (Allowed Cell Rate) 
associated with CRM. 

Compact Disk-Read Only Memory: Used by a computer to store large amounts of 
data. Commonly used for interactive video games. 

Cell Delay Variation: CDV is a component of cell transfer delay, induced by 
buffering and cell scheduling. Peak-to-peak CDV is a QoS delay parameter 
associated with CBR and VBR services. The peak-to- peak CDV is the ((1-a) 
quantile of the CTD) minus the fixed CTD that could be experienced by any 
delivered cell on a connection during the entire connection holding time. The 
parameter "a" is the probability of a cell arriving late. See CDVT.