Glossary:
324 Installation and Upgrades for G700 with S8300 or S870 0
555-234-100 — Issue 3 — May 2003
communications system
A software-controlled processor complex that interprets di al pulses, tones, and keyboard characters, and makes the prop er
connections within the system and externally. The communications system consists of a digital computer, software,
storage devices, and carriers, with special hardware to perform the connections. A communications sys te m prov ides
communications services for the telephones on customer premises and the data terminals on cust omer premises, including
access to public networks and private networks. See also switch.
COM port
A communications port. UNIX recognizes only COM1 and COM2, and presents COM1 and COM2 to the user as TTY
ports. DOS recognizes COM1 and COM2, and also recognizes COM3 an COM4, although there is contention for t he
interrupt line when all COM ports are in use.
compression
An audio coding process that reduces 64-Kbps audio streams to sub-16- K bp s rates, at the expense of delay and audio
quality. Compression is useful for transport over the limited-bandwidth d ia l-up connections that are used with point-to-
point protocol (PPP). Compression is usually referred to as CODEC compression/decompression. Common standard
CODECs are G.723a and G.729. See also codec; digital signal processor (DSP).
computer telephony integration (CTI)
The combination and interworking of telephony function s and computer operations.
concentration highway
A serial time-division multiplex (TDM) bus that is used to interconnect communications devices.
confirmation tone
A tone that confirms that the system activated, deacti vated, or canceled a feature as requested.
connectivity
The state in which a domain of connected devices all adhere to the same set of connection rules. Connect ivity is the
property of a network by which dissimil ar devices can communicate with each ot her.
console
See attendant console.
constant bit rate (CBR)
Digital information, such as video and digitized voice, that is represented by a continuous stream of bits. CBR traffic
requires guaranteed throughput rates and service levels.
contiguous slotting
Term that describes adjacent DS0s within one T1 facility or one E1 facility , or adjacent TDM slots or fiber tim e slots. The
first TDM bus and the last TDM bus, DS0, or fiber time slots are not considered contiguous (no wraparound). For an E1
facility with a D-channel, DS0s 15 and 17 are considered contiguous.
Controlled Local Area Network (CLAN) circuit pack
A circuit pack (TN799B) in a DEFINITY port network (PN) that provides TCP/IP connectivity to adjuncts over Ethernet
or Point-to-Point Protocol (PPP). The CLAN circuit pack serves as the network interface for a DEFINITY server. The
CLAN terminates IP (TCP and UDP), and relays those sockets and connections up to the DEFINITY server.
controlled station
A station that a domain-control association monitors and co nt rols. See also domain-control association.
COR
See Class of Restriction (COR).
COS
See Class of Service (COS).