RoIP 3 PTT port Internet Radio Receiver

Overview

The fundamental of RoIP(Radio over IP)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

• Support standard SIP to bridge Radio network viaIP network.
• DTMF code for remote Switch.
• Build in NAT
• IP recording.
• 3 PTT Ports.
• VAD technology, lower bandwidth
• PPPoE,fixed IP and DHCP access.
• DDNS supported.
• Built-in GSM module,Calling between GSM and Radio

Software Specifications

• Standard SIP VoIP Protocols (ETF SIP V2)
• Codec: G.711 (A/μ law), G.729A/B, G.723.1
• Point-to-point protocol over Ethernet (PPPoE);
• Hypertext Transfer Protocol (HTTP);
• Dynamic Host Configuration Protocol (DHCP);
• Domain Name System (DNS);
• DTMF: SIP INFO
• Flexible jitter buffer
• VLAN / Qos
• Comfort noise generation (CNG)
• Voice activity detection (VAD)
• Dynamic DNS (DDNS)

Hardware Specifications

Core Design

• CPU:ARM9
• RAM:16MB
• FLASH:4MB
• DSP:11MHz,16 Bit Bus
• OS:Linux(version 2.6)
• Network Protocols:IP,TCP,HTTP,ICMP,DHCP CLIENT &
SERVER,NTP,ToS,DDNS,
• VoIP Protocol:SIP v.2
• Configuration GUI:HTML,XML2.0,JAVA
• Codecs:G.711 (a-law & μ-law), G.729A, G.729AB, G.723.1, GSM

Physical & Operation Conditions

• Power Supply:12V/DC, 500mA
• WAN Port:10/100 Base-T
• LAN Port:10/100 Base-T
• Switch(Relay):220VAC input and 500 mA load current
• Dimension:10cm x 6.8cm x 2.5cm
• Weight(main unit):100g
• Storage Temperature:-40°C - 80°C
• Operating Temperature(room):0°C - 40°C

PTT Interface

- PTTIN Active Low: <0.7V (4.7KΩ load)
- PTTIN Active High: >1.2V
- PTTOUT High Output: 5V (4.7 KΩ load)
- PTTOUT Low Output: 0V
- APUT Output: 8Ω 750mW 5V P-P
- AIN Input: 600Ω Internal Impedance, 0 – 0.6Vp-t-p
- ADJOUT (on the Adapter Cable): 2KΩ Potentiometer