4-Channel IP Network Decoder with Power Control
4x Independent LINE Outputs • 4x Switched AC Outlets • Dual NIC Backup • 3-Wire Alarm Relay • Independent Volume Control
T-7704
Four independent audio channels with per-zone power control. The T-7704 is a 1U rack-mount IP decoder featuring four completely independent audio channels, each with its own LINE output and switched AC power outlet. Ideal for multi-source distribution, multi-zone paging, or systems requiring physical separation of audio paths. Dual NIC ports provide network redundancy for mission-critical applications.
| Model Number | T-7704 |
| Product Type | 4-Channel IP Network Decoder |
| Form Factor | 1U, 19" Rack Mount |
| Audio Channels | 4 x Independent |
| Audio Outputs | 4 x LINE Out (RCA, 1V RMS) |
| Channel Control | Independent volume, mute, source routing |
| Power Outlets | 4 x Switched AC outlets (IEC C13, 100-240V, 5A total max) |
| Network | 2 x 10/100Mbps Ethernet (RJ45) - Dual NIC Redundancy |
| Network Redundancy | Active/standby failover, <0.5s switchover |
| Audio Protocols | TCP/IP, UDP, HTTP, RTP, RTSP |
| Audio Codecs | MP3, WAV, PCM, G.711 |
| Alarm Relay | 3-wire (COM/NC/NO), 30V/1A max |
| Frequency Response | 20Hz – 20kHz (±1dB) |
| THD+N | < 0.05% (1kHz, -3dB) |
| S/N Ratio | > 95dB |
| Crosstalk | < -75dB (between channels) |
| DSP per Channel | 5-band EQ, compressor, limiter, delay (0-500ms) |
| Power Supply | AC 100-240V, 50/60Hz, internal |
| Power Consumption | ≤ 25W (excluding connected equipment) |
| Dimensions (WxDxH) | 483 x 280 x 44 mm (1U) |
| Weight | 3.8 kg |
| Operating Temperature | 0°C – 40°C |
| Humidity | 10% – 90% non-condensing |
| Certifications | CE, FCC, RoHS |
The T-7704 features two independent Ethernet ports. When both are connected to separate network switches, the decoder automatically fails over to the secondary port if the primary network path fails. Switchover time is <0.5 seconds with no audio dropout. Ideal for emergency systems, hospitals, and transportation hubs requiring continuous operation.
The T-7704 is a professional 4-channel IP network decoder designed for applications requiring multiple independent audio streams. Unlike single-channel decoders or zone matrix units, the T-7704 provides four completely separate decoding engines, each capable of receiving different network streams simultaneously and outputting via dedicated LINE outputs.
True Channel Independence: Each of the four channels operates as a standalone decoder. Channel 1 can play background music from a USB stream, Channel 2 can receive live paging from a T-7702A microphone, Channel 3 can play emergency messages, and Channel 4 can output scheduled bell tones – all simultaneously without interaction.
Per-Channel Power Control: Each audio channel has a corresponding rear-panel switched AC outlet. This allows individual amplifiers to be powered on only when their specific channel is active, saving significant energy in multi-zone installations. Outlets are rated for 5A total combined load.
Network Redundancy: Dual Ethernet ports with automatic failover ensure uninterrupted operation even in the event of a network switch failure. This makes the T-7704 particularly suitable for life safety and mission-critical communication systems.
Four separate audio streams simultaneously. Each channel has independent volume, EQ, and source routing. Zero crosstalk.
One AC outlet per channel. Automatically powers connected amplifiers only when that channel is active. Energy saving.
Two Ethernet ports with automatic redundancy. Connect to separate switches for network-path fault tolerance.
Form C relay contact (COM/NC/NO) for external alarm signaling. Trigger on any channel activity or fault condition.
| Channel | Audio Output | Power Outlet | DSP Features | Control |
|---|---|---|---|---|
| CH1 | LINE Out (RCA) | Outlet 1 | EQ, Comp, Delay | Network, front panel |
| CH2 | LINE Out (RCA) | Outlet 2 | EQ, Comp, Delay | Network, front panel |
| CH3 | LINE Out (RCA) | Outlet 3 | EQ, Comp, Delay | Network, front panel |
| CH4 | LINE Out (RCA) | Outlet 4 | EQ, Comp, Delay | Network, front panel |
The T-7704 continuously monitors both Ethernet ports. Under normal operation, Port 1 is active and Port 2 is in standby. If link loss is detected on Port 1, or if configurable ping monitoring to the gateway fails, the decoder switches to Port 2 within 500ms. Audio streams continue without interruption. Both ports can be on the same or different subnets/VLANs.
| Model | Outputs | Power Control | Network Redundancy | Special Features | Best For |
|---|---|---|---|---|---|
| T-7701 | 1x LINE out | 2x AC outlets (5A) | No | USB, IR, 3-wire volume | Single zone, analog amp integration |
| T-7701Z | 8x 100V zones | 1x AC outlet (2000W) | No | Fire linkage, zone matrix | Multi-zone paging, evacuation |
| T-7704 | 4x LINE out | 4x AC outlets | Yes - Dual NIC | Per-channel DSP, relay | Multi-source, mission-critical |
The four AC outlets share a total maximum load of 5A (resistive). Do not exceed 5A combined. For high-power amplifiers, use the T-7704 outlets to trigger external contactors or power sequencers. Each outlet is rated for individual loads up to 5A but total combined load must not exceed 5A.
To achieve full network path redundancy, connect Port 1 to Switch A and Port 2 to Switch B. Ensure both switches have independent uplinks to the server. The T-7704 will automatically fail over if either switch or any cabling path fails. Tested and verified for <0.5s switchover.
Server → Dual Switches (Redundant) → T-7704 → CH1-4 LINE Out → Amplifiers 1-4 → Speaker Zones 1-4
Four independent audio streams: e.g., CH1 Lobby music, CH2 Office paging, CH3 Emergency alerts, CH4 Parking announcements. Each amplifier powered by corresponding switched outlet. Relay output triggers external warning light during emergency.