
Appendix A
Specifications
| Network | • SIP, RTP, RTCP, TFTP, TCP, UDP, DHCP, DNS, ARP, ICMP, | 
| Protocols | Telnet | 
| Call Control | • SIP | 
| Protocols | 
 | 
| Audio | • Codec: ITU G.711 (PCM), two low bit rate (G.723.1 and G.729A | 
| Standards | / G.729AB) | 
| 
 | • Acoustic Echo cancellation supporting  | 
| 
 | speakerphone | 
Keypad
Features &
Handset
LCD
LED
LAN
Memory
•
•12 standard dialing keys: 
•16 feature keys: Redial, 
•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
•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.
•Hold, Mute, Speaker, Conference, Headset, Intercom.
•Message waiting indicator
•2 Standard 10/100/1000 
•Flash ROM: 4M, stores boot ROM, software imaging and configuration data, DSP images.
•DRAM: 8M, stores runtime program and data.
IP 720 User Manual 33