Glossary

• Analog Telephone Adaptor	• Internet Service Provider	• QoS
• ATA	• IP Address	• Quality of Service
• Bandwidth	• ISP	• Realtime Transport Protocol
• Broadband	• Jitter	• REN
• Codec	• Lag	• Ringer Equivalency Number
• DHCP	• Latency	• Router
• DMZ	• Mean Opinion Score	• RTP
• DNS	• MOS	• Session Initiation Protocol
• Domain Name System	• Octet	• SIP
• DTMF	• Operating System	• Softphone
• Dual-tone multi-frequency	• OS	• TCP
• Dynamic Host Configuration Protocol	• Port Forwarding	• Transmission Control Protocol
• E911	• POTS	• Trunk
• Foreign Exchange Station	• Power cycling	• UDP
• FXS	• Protocol	• User Datagram Protocol
• G711	• PSTN	• Voice over IP
• Gain	• Public Switched Telephone Network	• VoIP