Description
Product Name: 4 Ports GSM Gateway with 4 SIM Cards in Goip Gateway Model NO.: GoIP4 Support Network: GSM Type: Wired Usage: Telephone Weight: 500 G (1 Lb) (Including AC/DC Adapter) Power: 12 Vdc 2a (AC/DC Adapter Included) Warranty: One Year Trademark: DBL Transport Package: 36(L)Cm*21(W)Cm*7(H)Cm Specification: 26(L)Cm*16(W)Cm*3(H)Cm Origin: China HS Code: 8517709000 Product Description Key FeaturesOpen Standard VoIP Protocols (ITU H. 323 V4 and IETF SIP V2)Single or Multiple Server RegistrationsTwo 10/100 Ethernet circuits connect to the LAN and an additional deviceGSM module for making GSM callsSpeech quality ensured by QoS at the Ethernet and IP layers and comprehensive jitter bufferVLAN and QoS supportNAT Transversal and Router functionsVoice prompts, HTTP Web, Auto Provision support for configuration and updatesHighly stable embedded Linux operating system in high performance ARM 9 ProcessorBasic FeaturesLEDs for Power, Ready, Status, WAN, PC, GSMCall forward from GSM to VoIP and VoIP to GSMDial in mode or dial out mode onlyDial PlanPassword protection for both GSM dial in or dial outRetransmit GSM Caller ID to VoIP terminalEnhanced FeaturesDynamic selection of codecAdvanced jitter bufferAutomatic traversal of NAT and firewallVLAN / QosRouterEcho cancellation for SpeakerphoneComfort noise generation (CNG)Voice activity detection (VAD)Auto provisioning (requires auto provisioning server)On line firmware upgradeMulti-language support: English and ChineseSupported StandardsITU: H. 323 V4, H. 225, H. 235, H. 245, H. 450RFC 1889 - RTP/RTCPRFC 2327 SDPRFC 2833 RTP Payload for DTMF Digits, Telephony Tones and Telephony SignalsRFC 2976 SIP INFO MethodRFC 3261 SIPRFC 3264 Offer/Answer model with SDPRFC 3515 SIP REFER MethodRFC 3842 A Message Summary and Message Waiting IndicatorRFC 3489 Simple Traversal of User Datagram Protocol (UDP) Through Network Address Translators (NATs)RFC 3891 SIP Replaces HeaderRFC 3892 SIP Referred-By MechanismDraft-ietf-sipping-CC-transfer-04 Session Initiation Protocol Call Control - TransferCodec: G. 711 (A/µ Law), G. 729A/B, G. 723.1DTMF: RFC 2833, In-band DTMF, SIP INFO
