Synway DST-24B/PCI (2.0) - 24 ports

24-port PCI board for tapping PBX extensions

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Synway DST-24B/PCI (2.0) - 24 ports


The DST range of single-slot solutions for logging and monitoring behind PBXs, fits into a variety of PBXs extension tapping environments, including connection between the PBX and the proprietary handsets providing passive monitoring of the voice conversation and D-channel (call control). A variety of telephony events such as call taken and key pressed are automatically decoded and sent to recording applications for a powerful set of functions and high integration with PBXs. As a modular structure, the DST series can be customized to provide 24, 16, 12, 8, 4 ports (per slot) ideal small offices up to large call centers. For that reason many developers worldwide depend on DTP series to create robust and high capacity systems in central office and Telco environments.


Multiple PBX Support
A single board interfaces with a majority of PBXs on single hardware platform. With much field expertise, Synway can configure for your PBXs. Structured with motherboard and functional module architectures, a single DST board can be configured freely from 4 to 24 ports based upon special application needs.


Flexible Configuration
Structured with motherboard and functional module architectures, a single DST board can be configured freely from 4 to 24 ports based upon special application needs.


Firmware Upgraded
No need for hardware change and special upgrading tools, a simple firmware upgrade allows DST to fit into different PBX environments.


On-Board Audio Jack
Monitors up to 24 ports in real-time or playback audio files with on-board audio jack resources.


Wide Spectrum of Trigger Events
DST initiates and terminates recordings based on voice activity, raw D-channel, DTMF, programmable tone analysers, and Call Progress Monitoring (CPM) events.


Voice Processing Capability
A large selection of voice CODECS for developers, including G.729A, G.711 A-law, μ-law, Linear PCM,IMA-ADPCM, MP3, and support VOX format.


Support Direct Windows WAV Format
Data is saved in WINDOWS WAV format directly, and can be played out by sound card with no format conversion.


Security for User Software
The built-in authorized code identification circuit is included to provide an exclusive authorization code for protecting users' software security.


Extensive PBX Support
Compatible with international deployments, the DST taps 2-wire, 4-wire, BRI and full duplex PBX's. The list of PBXs the DST supports is constantly growing. Please feel free to contact Synway for custom configuration.


Tap Failure Detection
Support detection for malfunction of hardware platforms and digital telephone as well as digital line interruption.


310×115mm2 (excluding L-bracket)
DST-24B/PCI(2.0), DST-24B/PCI+(2.0), DST-24B/PCIe(2.0), DST-24B/PCIe+(2.0):
160×111mm2 (excluding L-bracket)


≈ 250g (including 2 8-port recording modules)
DST-24B/PCI(2.0), DST-24B/PCI+(2.0), DST-24B/PCIe(2.0), DST-24B/PCIe+(2.0):
≈ 200g (including 2 8-port recording modules)


Operating temperature: 0℃—55℃
Storage temperature: -20℃—85℃
Humidity: 8%— 90% non-condensing
Storage humidity: 8%— 90% non-condensing


Input/output Interface
Headset jack: One φ3.5 stereo jack
Telephone line jack: One 50-pin RJ21 connector


Audio Specifications
Codec: CCITT A/μ-Law 64kbps
IMA ADPCM 32kbps
High compression recording format:
GSM 13.6kbps
G.729A 8kbps
MP3 8kbps, 16kbps
Output power: ≥50mW
Distortion: ≤2%
Frequency response: 300-3400Hz(±3dB)
Signal-to-noise ratio: ≥38dB


Maximum System Capacity
Up to 10 boards concurrently per system; up to 24 channels per board


Power Requirements
+3.3V DC: 1500mA
+5V DC, 200mA

-12V DC, 20mA
+12V DC, 100mA
Maximum power consumption: ≤12W (PC power supply only)
DST-24B/PCIe(2.0), DST-24B/PCIe+(2.0):
+3.3V DC: 1300mA
+12V DC: 350mA
Maximum power consumption: ≤8.5W (PC power supply only)
+3.3V DC: 1300mA
+5V DC: 50mA
+12V DC: 300mA
Maximum power consumption: ≤8.5W (PC power supply only)


Input impedance: ≥1000Ω AC
Insulation resistance for PC isolation from telephone line: ≥20MΩ/500V DC


Audio Encoding & Decoding
16Bit PCM 128kbps
8Bit PCM 64kbps
A-Law 64kbps
μ-Law 64kbps
VOX 32kbps
ADPCM 32kbps
GSM 13.6kbps
MP3 8kbps, 16kbps
G.729A 8kbps


Sampling Rate




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