Quick DetailsPlace of Origin: Guangdong,Website:http://www.voipphonetech.com, China (Mainland) Brand Name: Linksys Model Number: SPA1001 Type: VoIP Adapter Warranty: 12 months color: silver FXS Port: 1 FXO Port: 1Packaging & DeliveryPackaging Details:in normal box , 50pcs/carton for Linksys spa1001 .Delivery Detail:3-20 working( depends on the quatity of customer order)Welcome Linksys SPA1001 one FXS VOIP PHONE ADAPTER UNLOCKED, Wholesale and RetailProduct Description1.Two voice ports (RJ-11) for analog phones or Fax machines2.Impedance AgnosticsFeatures1.Two voice ports (RJ-11) for analog phones or Fax machines2.Impedance Agnostics - 8 Configurable Settings3.Call Waiting, Cancel Call Waiting, Call Waiting Caller ID4.Caller ID with Name/Number (Multi-national Variants)5.Caller ID Blocking6.Call Forwarding: No answer, Busy, All7.Do Not Disturb8.Call Transfer9.Three-way Conference Calling with Local Mixing10.Message Waiting Indication - Visual and Tone Based11.Call Return12.Call Back on Busy13.Call Blocking with Toll Restriction14.Delayed Disconnect15.Distinctive Ringing - Calling and Called Number16.Off-hook Warning Tone17.Selective/Anonymous Call Rejection18.Hot line and Warm Line Calling19.Speed Dialing of 8 Numbers/Addresses20.Music on HoldPackage1.PAP2 Phone Adapter Unit2.Power Adapter3.RJ-45 Ethernet Cable4.Quick Installation GuideSpecificationsData networkingMAC Address (IEEE 802.3)IPv4 - Internet Protocol v4 (RFC 791) upgradeable to v6 (RFC 1883)ARP - Address Resolution ProtocolDNS - A Record (RFC 1706), SRV Record (RFC 2782)DHCP Client - Dynamic Host Configuration Protocol (RFC 2131)ICMP - Internet Control Message Protocol (RFC792)TCP - Transmission Control Protocol (RFC793)UDP - User Datagram Protocol (RFC768)RTP - Real Time Protocol (RFC 1889) (RFC 1890)RTCP - Real Time Control Protocol (RFC 1889)DiffServ (RFC 2475), Type of Service - TOS (RFC 791/1349)SNTP - Simple Network Time Protocol (RFC 2030)Voice gatewaySIPv2: Session Initiation Protocol v2 (RFC 3261, 3262, 3263, 3264)SIP Proxy Redundancy - Dynamic via DNS SRV, A RecordsRe-registration with Primary SIP Proxy ServerSIP Support in Network Address Translation Networks - NAT (incl. STUN)Secure (Encrypted) Calling via Pre-Standard Implementation of Secure RTPCodec Name AssignmentVoice AlgorithmsG.711 (A-law and μ-law)G.726 (16/24/32/40 kbps)G.729 AG.723.1 (6.3 kbps, 5.3 kbps)Dynamic PayloadAdjustable Audio Frames per Packet