Glossary

A

AAA

authentication, authorization, and accounting

ALTDGK

alternate directory gatekeeper

AR

Cisco Access Registrar

ASAP

Cisco Any Service, Any Port solution

ASP

application service provider

B

BAMS

Cisco Billing and Measurements Server

C

CAC

call admission control

CBWFQ

class-based weighted fair queueing

CDR

call detail record

CHAP

Challenge Handshake Authentication Protocol

CIC

Cisco Info Center; carrier identification code

CLI

command line interface

CO

central office

CPU

central processing unit

CVM

CiscoWorks2000 Voice Manager

D

DGK

directory gatekeeper

DNIS

Dialed Number Identification Service

E

EMEA

Europe, Middle East, and Africa

EMS

element management system

EO

end office

F

FG

feature group

G

GK

gatekeeper

GW

gateway

H

HDLC

high-level data link control

HSRP

Hot Standby Router Protocol—used to ensure GK fault tolerance

I

ICMP

Internet Control Message Protocol

ICPIF

ITU G.113 Calculated Planning Impairment Factor

IETF

Internet Engineering Task Force

IMT

intermachine trunk

IPM

Cisco Internetwork Performance Monitor

IS

in service

ISP

Internet service provider

ISUP

ISDN User Part

ITSP

Internet telephony service provider

ITU

International Telecommunication Union

IVR

interactive voice response

L

L2F

Layer 2 Forwarding Protocol

L2TP

Layer 2 Tunneling Protocol

LFI

Cisco Link Fragmentation and Interleaving

LLQ

low latency queuing

LNS

L2TP network server

M

MGC

Media Gateway Controller

MGCP

Media Gateway Control Protocol

MIB

Management Information Base

MLP

Multilink PPP

MML

Man-Machine Language

MMP

Multichassis Multilink PPP

MTP

Message Transfer Part

N

NAS

detwork access server

NMS

network management system

NTP

Network Time Protocol

NFAS

Non-Facility Associated Signaling

O

OGW

originating gateway

OLO

other local operator; other licensed operator

OOS

out of service

OPC

origination point code

OPT

Open Packet Telephony

OSP

Open Settlements Protocol

OSS

Operations Support System

P

PCM

pulse code modulation

PDF

Portable Document Format

PIN

personal identification number

POP

point of presence

PPM

port policy management

PPP

Point-to-Point Protocol

PSQM

perceptual speech quality measure

PSTN

public switched telephone network

PTT

Post, Telephone, Telegraph—a government-mandated or -operated national telephony carrier

Q

QoS

quality of service

QoV

quality of voice (SNMP)

R

RADIUS

Remote Authentication Dial-In User Service

RAI

resource availability indicator

RAS

H.225 Registration, Admission, and Status Protocol—spoken between H.323 gateways and their gatekeepers

RLM

Cisco Redundant Link Manager

RPM

resource pool management; resource pool manager

RPMS

Cisco Resource Pool Manager Server

RSVP

Resource Reservation Protocol

RTCP

Real Time Conferencing Protocol; RTP Control Protocol

RTP

Real-Time Transport Protocol

RTR

Real Time Reporter

S

SC

signaling controller—a Cisco SC2200 signaling gateway that converts SS7 to a backhauled NI-2 protocol to gateways; see also VSC and MGC

SGBP

Stack Group Bidding Protocol

SGCP

Simple Gateway Control Protocol

SLT

signaling link termination; Cisco Signaling Link Terminal—a Cisco 2611 machine capable of terminating SS7 at the MTP2 layer and backhauling MTP3 (and up) to the SC2200 or virtual switch controller (VSC)

SNMP

Simple Network Management Protocol

SPE

system processing engine

SS7

Signaling System 7

T

TAC

Technical Assistance Center

TACACS

Terminal Access Controller Access Control System

TCL

Tool Command Language

TDM

time-division multiplex; time-division multiplexing

TFTP

Trivial File Transfer Protocol

TGW

terminating gateway

U

UG

universal gateway

UGM

Cisco Universal Gateway Manager

URL

uniform resource locator

V

VPDN

virtual private data (or dial) network

VSA

vendor-specific attribute—a nonstandard attribute tag used by RADIUS. Cisco has defined many useful VSAs to enhance the gateway CDR format.

VSC

virtual switch controller—one of various Cisco machines capable of providing SS7 signaling conversion, and able to control gateways by means of MGCP; referred to as the SC in this document

VWIC

Voice/WAN interface card

W

WFQ

weighted fair queuing

WIC

WAN interface card