Negotiable
The date of payment from buyers deliver within days
Guangdong
Long-term effective
2017-07-05 17:40
166
Company Profile
By certification [File Integrity]
Contact：Mr. Sasa(Mr.)
Email：
Telephone：
Phone：
Area：Guangdong
Address：Guangdong
Website： http://dbltek.byshaiwang.com/
The fundamental of RoIP(Radio overIP)technology is to convert the audio and PTT signals in a radio terminal into IP packets and then transmit the data via the IP networks. The challenge in this technology is to insure that the audio is transmitted in real time and the PPT control signal is transmitted immediately and reliably. The radio range is general limited by the restricted transmitting power, the antenna sensitivity, and other environmental factors.
Key Features
Open Standard VoIP Protocols (IETF SIP V2) Supply dynamic DNS service Two 10/100 Ethernet for WAN / LAN connections Peer-to-Peer IP Calls Speech quality ensured by QoS at the Ethernet and IP layers and comprehensive jitter buffer Line Echo Cancellation VLAN and QoS support NAT Transversal and Router functions Support IP voice stream to via a recording server Highly stable embedded Linux operating system in high performance ARM 9 Processor
Basic Features
LEDs for Power, Ready, Status, WAN, PC, FXS Support one PTT port Call Forward, Call Hold, Call Transfer Dial Plan Caller ID
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" Header RFC 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 INFO
Physical and Environmental
Storage temperature: 0°C to 50°C (32°F to 122°F)
Operating temperature: 10°C to 40°C (50°F to 104°F)
G.W: 0.35KG Power: 12 VDC 500 mA (110V-220V) (AC/DC adapter included) Warranty: one year
