IP Phone User Manual

IP 720 User Manual 33
Appendix A
Specifications
Network
Protocols
• SIP, RTP, RTCP, TFTP, TCP, UDP, DHCP, DNS, ARP, ICMP,
Telnet
Call Control
Protocols
• SIP
Audio
Standards
• Codec: ITU G.711 (PCM), two low bit rate (G.723.1 and G.729A
/ G.729AB)
• Acoustic Echo cancellation supporting high-quality
speakerphone
• Full-duplex
Keypad
Features &
Handset
• 12 standard dialing keys: 0-9, *, #
• 16 feature keys: Redial, Hang-up/Release, Hold, Intercom,
Speaker, Mute, Headset, Flash, Speed dial, Transfer, Conference,
Speaker, Voicemail, Voicemail greeting selection, Activity,
Volume control.
• 15 Function keys: can be set to Busy Lamp Field, AltiServ
feature code, speed dial, line park, call recording, workgroup
status.
• Adjustable Speaker/Ring/Handset/Headset volume control
LCD • 4 x 20 Character LCD Display
• Provide features such as time, calling party name, calling party
number, digits dialed, extension number, number of new voice
mails, DND/FWD, missed calls, and system information.
LED • Hold, Mute, Speaker, Conference, Headset, Intercom.
• Message waiting indicator
LAN • 2 Standard 10/100/1000 Base-T RJ-45 Ports: One for network to
phone connection, and one switch port for connection from
phone to PC
Memory • Flash ROM: 4M, stores boot ROM, software imaging and
configuration data, DSP images.
• DRAM: 8M, stores runtime program and data.