Description
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        - G.722 64kbps, G.711 a/μ-law, G.729A, G.726, G.723.1, GSM 6.10 Full Rate, iLBC 13.3 kbps
- DTMF Detection and Generation
- Silence Suppression & Detection
- Comfort Noise Generation (CNG)
- Voice Activity Detection (VAD)
- Echo Cancellation (G.168)
- Dynamic Jitter Buffer
- Call progress tone detection (FXO) and generation (FXS)
- Programmable Gain Control
- Inbuilt Local Mixer
- ITU-T V.152 Voice-band Data over IP Networks
 
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        Voice Features- G.722 64kbps, G.711 a/μ-law, G.729A, G.726, G.723.1 GSM 6.10 Full Rate, iLBC 13.3 kbps
- DTMF Detection and Generation
- Silence Suppression & Detection
- Comfort Noise Generation (CNG)
- Voice Activity Detection (VAD)
- Echo Cancellation (G.168)
- Dynamic Jitter Buffer
- Call progress tone detection (FXO) and generation (FXS)
- Programmable Gain Control
- Inbuilt Local Mixer
- ITU-T V.152 Voice-band Data over IP Networks
 Telephony Specifications- Configurable Payphone charging pulse interval by SIP OPTION
- In-Band DTMF, Out-of-Band DTMF Relay (RFC2833 or SIP INFO)
- DTMF / PULSE Dial
- Caller ID Generation / Detection:
 - DTMF
- FSK-Bellcore Type 1 & 2
- FSK-ETSI Type 1 & 2
- FSK-NTT
- FSK: Calling Name, Number, Date and Time, VMWI
 - FXS metering pulse options:
 - Polarity Reversal
- 12kHz calling tone
- 16kHz calling tone
 - Configurable Payphone charging signal interval by SIP OPTION
- Polarity Reversal Detection (FXO) and Generation (FXS)
- T.30 FAX passthrough, T.38 Real Time FAX Relay
- Auto PSTN bypass at network or power failure(SP350SO)
- ROH Tone (Receiver Off-Hook Tone @ 480 Hz)
- Loop Current Suppression
- Call Feature enable/disable via phoneset
 Physical- WAN : 1 x 100 baseTx,
 - auto cross-over,
- auto speed negotiation,
- RJ-45 connector
 - LAN : 1 x 100 baseTx,
 - auto cross-over,
- auto speed negotiation,
- RJ-45 connector
 - Telephone : RJ11 FXS or FXO port
- Factory default and Reset button Power jack
 LED Indicators- SP350DS : Power, Alarm, Register, Phone 1, Phone 2, WAN, LAN
- SP350SO : Power, Alarm, Register, Phone, Line, WAN, LAN
 IP Network Specifications- WAN: Static IP, PPPoE, DHCP, PPTP and L2TP
- NAT Functions
 - Support up to 250 Clients
- Port Forwarding (Virtual Servers)
- DMZ
 - Support IPv4, IPv6(optional)
- QoS Support:
 - WAN: DiffServ, IP Precedence, Priority Queue
- Rate Control, 802.1Q (VLAN Tagging),
- 802.1p (Priority Tag)
- LAN: Rate Limit
 - DDNS Support
- Network Protocol Support:
 - IP, TCP, UDP, TFTP, FTP, RTP, RTCP, ARP, ICMP, NTP,DHCP, STUN Client, HTTP, HTTPS, DNS, DNS SRV, Telnet,UPnP, IGMP, IGMP snooping, IGMP proxy, RTSP ALG, SIP ALG
 SIP, Voice and FAX Related Standard- RFC1889、RFC2543、RFC2833、RFC2880、RFC2976、RFC3261、RFC3262、RFC3263、RFC3264、RFC5359、RFC3265、RFC3311、RFC3323、RFC3325、RFC3362、RFC3515、RFC3550、RFC3665、RFC3824、RFC3841、RFC3842、RFC3891、RFC3892、RFC3960、RFC3986、RFC4028
 Network Related Standard- RFC318、RFC791、RFC792、RFC793、RFC768、RFC826、RFC959、RFC1034、RFC1035、RFC1058、RFC1157、RFC1305、RFC1321、RFC1349、RFC1350、RFC1661、RFC1738、RFC2854、RFC2131、RFC2136、RFC2327、RFC2474、RFC2516、RFC2616、RFC2617、RFC2637、RFC2766、RFC2782、RFC2818、RFC2916、RFC3022、RFC3489
 
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