GOIP8 8-канальный VoIP-GSM шлюз

GIOP8 8 CHANNEL VOIP GSM gateway The 8 portGSM Gateway (GoIP8)provides the extension of GoIP1 and supports up to 8 GSM channels.EachGSM channel canbeprogrammed individually to establish the connectivity with IP-PBX, or can bebundledas a single trunk in connection with IP-PBX.It is ideal for VoIP to wireless services where a fixed telephone line (PSTN) is not available or for cellphone roaming via the a VoIP network. The GoIP4brings mobility, scalability and significant savings on long distance charges. The GoIP4 has the following key features. Provide four cellular channels for IP-PBX Support open standard SIP Protocols (IETF SIP V2) Support SIP proxy mode Multiple GoIP4 grouping mode Two 10/100 Ethernet ports for the LAN and an additional device Guad band GSM module: support GSM850MHz, 900 MHz, 1800 MHz, 1900MHz Speech quality ensured by QoS at LAN, IP layers and comprehensive jitter buffer VLAN and QoS support NAT Transversal Voice prompts, HTTP Web Highly stable embedded Linux operating system in high performance ARM 9 Processor EnhancedFeatures LEDs for Power, Ready, Status, WAN, PC, GSM Call forward from GSM to VoIP and VoIP to GSM Dial in mode or dial out mode only Dial Plan Password protection for both GSM dial in or dial out Retransmit GSM Caller ID to VoIP terminal Dynamic selection of codecs Advanced jitter buffer Automatic traversal of NAT and firewall VLAN / Qos Echo cancellation for Speakerphone Comfort noise generation (CNG) Voice activity detection (VAD) Auto provisioning (requires auto provisioning server) Firmware upgrade from GUI Supported Standards ITU: H.323 V4, H.225, H.235, H.245, H.450 RFC 1889 - RTP/RTCP RFC 2327 - SDP RFC 2833 - RTP Payload for DTMF Digits, Telephony Tones and Telephony Signals RFC 2976 - SIP INFO Method RFC 3261 - SIP RFC 3264 - Offer/Answer model with SDP RFC 3515 - SIP REFER Method RFC 3842 - A Message Summary and Message Waiting Indicator RFC 3489 (STUN) - Simple Traversal of User Datagram Protocol (UDP) Through Network Address Translators (NATs) RFC 3892 - SIP Referred-By Mechanism Proprietary Firewall-Pass-Through Technology Codec: G.711 (A/µ law), G.729A/B, G.723.1 DTMF: RFC 2833, In-band DTMF, SIP INFO Web-base Management PPP over Ethernet (PPPoE) PPP Authentication Protocol (PAP) Internet Control Message Protocol (ICMP) TFTP Client Hyper Text Transfer Protocol (HTTP) Dynamic Host Configuration Protocol (DHCP) Domain Name System (DNS) User account authentication using MD5 Hardware Specifications