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Product features:
FXS VoIP Gateway
General features:
Physical interfaces
• WAN: 1 10/100/1000 Mbps Ethernet port
• LAN: 4 10/100/1000 Mbps Ethernet ports
• Phone ports: 8 FXS (RJ-11) ports
The software features
Voice Features
• G.722, G.711 a/u-law, G.723.1, G.726, G.729A B, GSM 6.10 Full Rate, iLBC13.3 kbps
• DTMF Detection and Generation 
• Silence Detection and Suppression 
• Comfort Noise Generation (CNG) 
• Voice Activity Detection (VAD)
• Echo cancellation (G.165/G.168)
• Adaptive (dynamic) jitter buffer
• Call progress tone generation
• Automatic or programmable gain control 
• Built-in local frequency converter
• ITU-T V.152 support  
Phone features
• In-Band DTMF, Out-of-Band DTMF Relay (RFC2833 and SIP INFO)
• DTMF/PULSE dial support 
• Caller ID Detection/Generation:
  - DTMF
  - FSK-Bellcore Type 1 and 2
  - FSK-ETSI Type 1 and 2
  - FSK: caller's name, number, date and time, vMWI
• FXS metering pulse:
  - Polarity Reversal
  - 12 kHz calling tone
  - 16 kHz calling tone
• Polarity Reversal Generation (FXS) 
• T.30 FAX Bypass, T.38 Real Time FAX Relay
• Modem over IP Up to V.34
• ROH Tone (Receiver Off-Hook Tone @ 480 Hz)
• Loop Current Suppression
• FXS Line test and diagnostics with visual alarm indication
• Incoming calls:
  - Loopback-codec
  - Loopback-analogue
  - SLIC DC power voltage
  - Tip / Ring DC feed
  - Ringer
• Outgoing calls (GR909 standard):
  - REN
  - Phone Line Disconnected
  - Hazardous and foreign DC Voltage
  - Hazardous and foreign AC Voltage
  - Wire a/b short-circuit
Supported SIP methods
SIP calls
• Peer-to-Peer call
• Call Hold/Retrieve
• Call Waiting
• Call Pick Up
• Call Park / Retrieve (SIP Server Required)
• Call Forward -unconditional, busy, no answer
• Call Transfer -attended, unattended
• Do Not Disturb
• Speed  Dialing
• Repeat  Dialing
• Three-way  Calling
• MWI  (RFC-3842)
• Hot Line and Warm Line
SIP Call Management
• Support Outbound Proxy
• Register up to three SIP servers
• SIP Registration Failover Mechanism
• Group  Hunting
• Privacy Mechanism / Private Extensions to SIP
• Session Timers (Update / Re-invite)
• DNS SRV Support
• Call Types: Voice / Modem / FAX
• Call Routing by Prefix Number
• User Programmable Dial Plan Support
• CDR Client
• Manual Peer Table (for P2P calls)
• E.164 Numbering, ENUM support
SIP Account Management
• By port registration
• By device registration (share account)
• Mixed mode (Hunt number for inbound, by port number for outbound)
• Invite with Challenge
• Register by SIP Server IP Address or Domain Name
• Support RFC3986 SIP URI format
IP Network Specifications
• IPv4, IPv6 support
• Network protocol support: IP, TCP, UDP, TFTP, FTP, RTP, RTCP, ARP, RARP, ICMP, NTP, SNTP, SNMP v1/v2/v3, HTTP, HTTPS, DNS, DNS SRV, Telnet, DHCP-server, DHCP-client, STUN-client, UPnP, IGMP snooping, IGMP proxy
• QoS support:
  - WAN: DiffServ, IP Precedence, priority queues, Rate Control, 802.1Q (VLAN Tagging), 802.1p (Priority Tag)
  - LAN: Rate Limit
• DDNS support
  - Dyndns.org, TZO and Peanut Hull
Network Security
• VPN PPTP client
• DIGEST authentication 
• MD5 Encryption 
• Protection against DoS attacks  
• Web based configuration
• Auto-provisioning (HTTP / HTTPS)
• Telnet
• Software upgrade via FTP / TFTP / HTTP
• Backup and restore settings
• The Reset button to reset to default settings
• TR-069/104 (optional)
• SNMP V3 / V2c / V1
SIP, Voice and FAX Related Standards
• RFC1889 RTP: A Transport Protocol for Real-Time Applications
• RFC2543 SIP: Session Initiation Protocol
• RFC2833 RTP Payload for DTMF Digits, Telephony Tones and Telephony Signals
• RFC2880 Internet Fax T.30 Feature Mapping
• RFC2976 The SIP INFO Method
• RFC3261 SIP: Session Initiation Protocol
• RFC3262 Reliability of Provisional Responses in Session Initiation Protocol (SIP)
• RFC3263 Session Initiation Protocol (SIP): Locating SIP Servers
• RFC3264 An Offer / Answer Model with Session Description Protocol (SDP)
• RFC3265 Session Initiation Protocol (SIP)-Specific Event Notification
• RFC3311 The Session Initiation Protocol (SIP) UPDATE Method
• RFC3323 A Privacy Mechanism for the Session Initiation Protocol (SIP)
• RFC3325 Private Extensions to the SessionInitiation Protocol (SIP) for Asserted Identity within Trusted Networks
• RFC3362 Real-time Facsimile (T.38) -image/t38 MIME Sub-type Registration
• RFC3515 The Session Initiation Protocol (SIP) Refer Method
• RFC3550 RTP: A Transport Protocol for Real-Time Applications. July 2003
• RFC3665 Session Initiation Protocol (SIP) Basic Call Flow Examples
• RFC3824 Using E.164 numbers with the Session Initiation Protocol (SIP)
• RFC3841 Caller Preferences for the Session Initiation Protocol (SIP)
• RFC3842 A Message Summary and Message Waiting Indication Event Package for the Session Initiation Protocol (SIP)
• RFC3891 The Session Initiation Protocol (SIP) "Replaces" Header
• RFC3892 The Session Initiation Protocol (SIP) Referred-By Mechanism
• RFC3960 Early Media and Ringing Tone Generation in the Session Initiation Protocol (SIP)
• RFC3986 Uniform Resource Identifier (URI): Generic Syntax
• RFC4028 Session Timers in the Session Initiation Protocol (SIP)
• Draft-ietf-sipping-service-examples-08 for call features
Network Related Standards
• RFC318 Telnet Protocols
• RFC791 Internet Protocol
• RFC792 Internet Control Message Protocol
• RFC793 Transmission Control Protocol
• RFC768 User Datagram Protocol
• RFC826 Ethernet Address Resolution Protocol
• RFC959 File Transfer Protocol
• RFC1034 Domain Names-concepts and facilities
• RFC1035 Domain Names-implementation and specification
• RFC1058 Routing Information Protocol
• RFC1157 Simple Network Management Protocol (SNMP)
• RFC1305 Network Time Protocol (NTP)
• RFC1321 The MD5 Message-Digest Algorithm
• RFC1349 Type of Service in the Internet Protocol Suite
• RFC1350 The TFTP Protocol (Revision 2)
• RFC1661 The Point-to-Point Protocol (PPP)
• RFC1738 Uniform Resource Locators (URL)
• RFC2854 The 'text / html' Media Type
• RFC2131 Dynamic Host Configuration Protocol
• RFC2136 Dynamic Updates in the Domain Name System (DNS UPDATE)
• RFC2327 SDP: Session Description Protocol
• RFC2474 Definition of the Differentiated Services Field (DS Field)
• RFC2516 A Method for Transmitting PPP Over Ethernet
• RFC2616 Hypertext Transfer Protocol -HTTP/1.1
• RFC2617 HTTP Authentication: Basic and Digest Access Authentication
• RFC2637 Point-to-Point Tunneling Protocol
• RFC2766 Network Address Translation-Protocol Translation (NAT-PT)
• FC2782 A DNS RR for Specifying the location of Sevices (DNS SRV)
• RFC2916 E.164 Number and DNS
• RFC3022 Traditional IP Network Address Translator
• RFC3489 STUN-Simple Traversal of User Datagram Protocol (UDP) Through Network Address Translators (NATs)
Physical Parameters
• 28.7 x 16 x 3.6 cm
• 1300 g
• Input: 100 to 240 VAC, 50/60 Hz
• Output: 12 V DC, 2 A
• Operating: -10° to 45°C
• Storage: -25° to 75°C
• Operating: 0% to 90% (non-condensing)
• Storage: 0% to 95% (non-condensing)
• EMI Certifications: FCC part15 B, CE class B
• Safety Certifications: CE/LVD

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