Voice Functionality
• SIP (RFC 3261) version 2
• SDP (RFC 2327)
• RTP (RFC1889)
• RTCP (RFC1890)
• Echo Cancellation: G.168
• VAD (Voice Activity Detection)
• Silence Suppression
• CNG (Comfort Noise Generation)
• Dynamic Jitter Buffer (Adaptive)
• QoS Supports TOS, DiffServ
• VLAN Tagging
• 3 REN per RJ-11 FXS ports
• DTMF Detection and Generation
• DTMF: In-Band and Out-of-Band
(RFC 2833), (SIP INFO)
• SIP NAT Traversal Support STUN
(RFC 3489)
• Fax Tone Detection and Pass-through
• Modem Tone Detection and Pass-through*
• T.38 FAX Relay*
• Speed Dial Phonebook
• Telephony Features: Caller ID, Call
Waiting, Message Waiting, Three Way
Conference (Depends on IP Telephony
Service Provider)*
• Flash Hook Timer*
• Multiple SIP Accounts/Phone Numbers —
Freely assignable to Each Phone Port
• Multiple Channel Technology
Voice Codecs
• G.711
• G.729
• GSM (Option)*
• G.726 (Option)*
• G.723 (Option)*
PSTN Lifeline Support
(Option, P-2002L with PSTN Line Port)
• Send Emergency Call to PSTN
• Make a PSTN Call by Dialing
Pre-fix Number
• PSTN Relay when Device Power Down
• PSTN Relay when VoIP Service is
Not Available
• Receive Incoming PSTN Phone Call
Network Functionality
• PPPoE
• DHCP Client
• Friendly Web-based Configuration Tool
• Telnet Management
• FTP/TFTP Firmware Upgrade and
Configuration Backup/restore
• Support TFTP Auto-Provisioning