Руководство По Установке для Zhone 5100
APPENDIX D
D-4
Vpacket 5100/6100 Series Installer’s Guide
ISDN—Integrated Services Digital Network. Communication protocol, offered by telephone
companies, that permits telephone networks to carry data, voice, and other source traffic.
IVR—interactive voice response. Term used to describe systems that provide information in the
IVR—interactive voice response. Term used to describe systems that provide information in the
form of recorded messages over telephone lines in response to user input in the form of spoken
words or more commonly DTMF signaling. Examples include banks that allow you to check your
balance from any telephone and automated stock quote systems.
LAN—Local Area Network.
LAN—Local Area Network.
MGCP— Media Gateway Control Protocol used in VoIP networks
MIB— Management Information Base.
MLPPP—MultiLink PPP.
NAT— Network Address Translation.
Packet. Logical grouping of information that includes a header containing control information
MLPPP—MultiLink PPP.
NAT— Network Address Translation.
Packet. Logical grouping of information that includes a header containing control information
and (usually) user data. Packets are most often used to refer to network layer units of data.
Plain Old Telephone Service (POTS). The standard telephone service that most homes use. In
Plain Old Telephone Service (POTS). The standard telephone service that most homes use. In
contrast, telephone services based on high-speed, digital communications lines, such as DSL, are
not POTS. The main distinctions between POTS and non-POTS services are speed and
bandwidth. POTS is generally restricted to about 52 Kbps (52,000 bits per second). The POTS
network is also called the public switched telephone network (PSTN).
PPP— Point-to-Point Protocol.
PRI. PRI refers to a type of ISDN connection that is divided into 23 B channels and 1 D channel
PPP— Point-to-Point Protocol.
PRI. PRI refers to a type of ISDN connection that is divided into 23 B channels and 1 D channel
(24 channels total) and runs over a T1 physical interface. PRI is typically used for connections
between a PBX and a CO.
PSTN—Public Switched Telephone Network. General term referring to the variety of telephone
PSTN—Public Switched Telephone Network. General term referring to the variety of telephone
networks and services in place worldwide.
Quality of Service (QoS). A prescribed level of network and transmission performance defined
Quality of Service (QoS). A prescribed level of network and transmission performance defined
using the parameters such as bandwidth, latency, jitter, packet loss, and/or application response
time.
RFC—Request for comments document.
SDSL— Synchronous Digital Subscriber Line.
SF—Super Frame. Common framing type used on T1 circuits. SF consists of 12 frames of 192
RFC—Request for comments document.
SDSL— Synchronous Digital Subscriber Line.
SF—Super Frame. Common framing type used on T1 circuits. SF consists of 12 frames of 192
bits each, with the 193rd bit providing error checking and other functions. SF is superseded by
ESF, but is still widely used. Also called D4 framing.
SIP. Session Initiation Protocol (RFC 2543).
SNMP—Simple Network Management Protocol. Network management protocol used almost
SIP. Session Initiation Protocol (RFC 2543).
SNMP—Simple Network Management Protocol. Network management protocol used almost
exclusively in TCP/IP networks. SNMP provides a means to monitor and control network
devices, and to manage configurations, statistics collection, performance, and security.
T1. Digital WAN carrier facility. T1 transmits DS 1-formatted data at 1.544 Mbps through the
T1. Digital WAN carrier facility. T1 transmits DS 1-formatted data at 1.544 Mbps through the
telephone switching network, using alternate mark inversion or B8ZS coding.
T1 trunk. Digital WAN carrier facility. See T1.
T1 trunk. Digital WAN carrier facility. See T1.