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| Network Protocol | Call Function | ||||
| - SIP v2 (RFC3261) - IP/TCP/UDP/RTP/RTCP - IP/ICMP/ARP/RARP/SNTP - TFTP Client/ DHCP Client/ PPPoE Client - Telnet/ HTTP Server |
- Call Hold - Call Waiting - Call Forward - Caller ID - 3-way conference |
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| Voice Quality | Security | Configuration | |||||
| - VAD: Voice activity detection - CNG: Comfortable noise generator - LEC: Line echo canceller - Packet Loss Compensation - Adaptive Jitter Buffer Security |
- HTTP 1.1 basic/ digest authentication for Web setup - MD5 for SIP authentication (RFC 2609 / RFC 2617) |
- Web Browser - TFTP/FTP - Keypad |
| Codec | Phone Function | DTMF Function | |||||
| - G.711: 64k bit/s (PCM) - G. 723.1: 6.3k / 5.3k bit/s - G. 726: 16k / 24k / 32k / 40k bit/s (ADPCM) - G.729A: 8k bit/s (CS-ACELP) - G,729B: adds VAD & CNG to G.729 |
- Volume Adjustment - Speed dial, Phone book (140 sets) - Flash - Call History - Voice mail / Incoming call Indicator |
- In-Band DTMF - Out-of-Band DTMF - SIP Info |
| Firmware Upgrade | IP Assignment | ||||
| - TFTP - HTTP |
- Static IP - DHCP - PPPoE |
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