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Command Line Interface
CLI
Central Office—connects to the PSTN.
CO
Dynamic Host Configuration Protocol—used to assign and manage IP
DHCP
addresses for a network.
Domain Name Server
DNS
Backup system used to continue operations if the main device goes
Failover
down. During a power interruption, an analog telephone connected to
the failover can place emergency calls.
Foreign Exchange Office. Device interface that provides a CO
FXO
connection so that a VoIP device can connect to an analog signal.
Receives power (battery) and ring signals.
Foreign Exchange Station. Device interface that connects to an analog
FXS
device such as a telephone or fax machine.
Local Area Network.
LAN
Light Emitting Diode. Lit or blinking LEDs on the device indicate
LED
connection, signal transmission, and power supply.
Media Access Control. A MAC address is a hardware address that
MAC
uniquely identifies each network device.
Media Gateway Control Protocol
MGCP
Personal Computer
PC
Portable Document Format
PDF
Plain Old Telephone Service.
POTS
Public Switched Telephone Network
PSTN
Session Controller
SC
G
LOSSARY
9
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