IP Network Audio Collecting Terminal with Zone Trigger
2x RCA Input • 5-Zone Trigger • Audio-Triggered Acquisition • Aluminum Alloy Shell
T-7770 RCA 5-ZONE
Bring local audio sources into your IP network. The T-7770 is an IP network audio collecting terminal that converts analog audio from external sources (microphones, media players, mixers) into network streams for distribution throughout the T-7700 system. With 5-zone trigger inputs and audio-triggered acquisition, it's ideal for integrating local announcements and emergency systems.
| Model Number | T-7770 |
| Product Type | IP Network Audio Collecting Terminal |
| Audio Inputs | 2 x RCA (line level) |
| Zone Triggers | 5-zone trigger input (dry contact) |
| Acquisition Mode | Audio-triggered, continuous, scheduled |
| Enclosure Material | Aluminum Alloy |
| Network | 10/100Mbps Ethernet (RJ45) |
| Audio Protocols | TCP/IP, UDP, HTTP, RTP, RTSP |
| Audio Codecs | MP3, WAV, PCM |
| Frequency Response | 20Hz – 20kHz (±1dB) |
| THD+N | < 0.05% |
| S/N Ratio | > 90dB |
| Power Supply | PoE (IEEE 802.3af) or DC 24V |
| Power Consumption | ≤ 5W |
| Mounting | Desktop / wall mount |
| Dimensions (WxDxH) | 150 x 100 x 30 mm |
| Weight | 0.6 kg |
| Operating Temperature | 0°C – 40°C |
| Humidity | 10% – 90% non-condensing |
| Color | Black / Silver |
| Certifications | CE, FCC, RoHS |
The T-7770 can be configured to start streaming only when audio is detected on the inputs. This saves network bandwidth and storage, and is ideal for applications like local paging where audio is intermittent. Adjustable threshold and hold time.
The T-7770 is an IP network audio collecting terminal that bridges analog audio sources to your T-7700 IP audio system. It converts line-level audio from microphones, media players, mixers, or emergency systems into network streams for distribution to speakers, decoders, and amplifiers throughout the facility.
Bring Local Sources onto the Network: Many facilities have existing analog audio sources – local paging microphones, background music players, emergency notification systems. The T-7770 connects these to your IP network, making them available anywhere.
5-Zone Trigger Inputs: The five dry contact trigger inputs allow external devices (fire alarm panels, push buttons, sensors) to initiate audio collection and specify which zones receive the audio. For example, a fire alarm contact can trigger an emergency message to be streamed to specific zones.
Audio-Triggered Acquisition: To save bandwidth and automate operation, the T-7770 can be set to begin streaming only when audio is detected on the inputs. Perfect for local paging where audio is intermittent.
Rugged Aluminum Construction: The aluminum alloy shell provides durability and RF shielding, ensuring clean audio transmission even in electrically noisy environments.
Simple Integration: Power via PoE or DC24V. Configured through T-7700RP software. No local programming required.
Connect line-level sources: microphones, media players, mixers, emergency systems.
Dry contact inputs select destination zones. Ideal for fire alarm integration.
Stream only when audio is present – saves bandwidth, perfect for paging.
Rugged, RF-shielded enclosure for clean audio in demanding environments.
| Parameter | Specification |
|---|---|
| Input Type | 2 x RCA (unbalanced line level) |
| Input Impedance | 10kΩ |
| Max Input Level | 2V RMS |
| Gain Adjustment | -12dB to +12dB (software) |
| Frequency Response | 20Hz – 20kHz (±1dB) |
| THD+N | < 0.05% |
2x RCA
Line level inputs
| Parameter | Specification |
|---|---|
| Number of Inputs | 5 (dry contact) |
| Trigger Type | Contact closure (NO/COM) |
| Voltage | 3.3V DC (internal pull-up) |
| Programmable Actions | Select zones, start/stop streaming, play preset message |
| Debounce Time | 50ms (configurable) |
5-zone trigger
Fire alarm integration
| Parameter | Specification |
|---|---|
| Detection Method | Voice Activity Detection (VAD) |
| Threshold | -50dB to -20dB (adjustable) |
| Hold Time | 0.5 – 5 seconds (adjustable) |
| Pre-roll | Up to 500ms (capture before trigger) |
| Post-roll | Up to 2 seconds (continue after speech) |
Audio-triggered
Stream only when talking
Connect fire alarm panel dry contacts to T-7770 trigger inputs. Program each trigger to stream a specific emergency message to designated zones. When alarm activates, the T-7770 automatically streams the message, overriding all other audio. The aluminum enclosure ensures reliable operation even in harsh environments.
Analog Source → T-7770 → Network Switch → T-7700 Server → Zone Amplifiers/Speakers
Example: Fire alarm panel contact triggers T-7770 to stream emergency message to all zones. Message plays through T-7700B amplifiers and T-7782 outdoor speakers.
For paging applications, configure audio-triggered mode with appropriate threshold. Test with typical speech levels. Adjust hold time to prevent clipping of words. Pre-roll ensures no lost audio at the beginning of announcements.
Using T-7700RP software, assign each trigger input to specific zones or groups. Triggers can start, stop, or toggle streaming. Multiple triggers can be combined for complex logic. For fire alarm, use highest priority to override all other audio.
T-7770 connected to fire alarm panel and network
Fire panel provides dry contact closure on alarm. T-7770 detects trigger and begins streaming pre-recorded emergency message to all zones via T-7700 system. Message continues until alarm resets. Aluminum enclosure ensures reliability in utility rooms.