Четыре каналы CDMA VoIP шлюз (COIP_4)

The Four Channels CDMA VoIP Gateway COIP-4 is a 4CDMA Card Broadband Phone Gateway that had been developed by DBL Co. COIP_4 SIM Card Broadband Phone Gateway is a new product that connect the CDMA and the VOIP seamlessly. To COIP_4 what is installed on the Mobile SIM Card, you can register theCDMA telephone on the VOIP Softswitch.SIP and H.323 agreement are built in the COIP_4 and configured flexible. Caller ID can be seen by using SIP. Flexible routing can meet the need of all kinds of call forwarding; even more special is that COIP_4 support multi-device group, it can be easily combined into arbitrary number of channels of Large Gateway Group. Key Features Open Standard VoIP Protocols (ITU H.323 V4 and IETF SIP V2) Single or Multiple Server Registrations Two 10/100 Ethernet circuits connect to the LAN and an additional device CDMAmodule for makingCDMA calls Speech quality ensured by QoS at the Ethernet and IP layers and comprehensive jitter buffer VLAN and QoS support NAT Transversal and Router functions Voice prompts, HTTP Web, Auto Provision support for configuration and updates Highly stable embedded Linux operating system in high performance ARM 9 Processor Basic FeaturesLEDs 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 RetransmitCDMA Caller ID to VoIP terminal Enhanced Features Dynamic selection of codec Advanced jitter buffer Automatic traversal of NAT and firewall VLAN / Qos Router Echo cancellation for Speakerphone Comfort noise generation (CNG) Voice activity detection (VAD) Auto provisioning (requires auto provisioning server) On line firmware upgrade Multi-language support: English and Chinese 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 Simple Traversal of User Datagram Protocol (UDP) Through Network Address Translators (NATs)RFC 3891 SIP Replaces HeazdeRFC 3892 SIP Referred-By Mechanism draft-ietf-sipping-cc-transfer-04 Session Initiation Protocol Call Control - Transfer Codec: G.711 (A/µ law), G.729A/B, G.723.1 DTMF: RFC 2833, In-band DTMF, SIP NFO