Our Echo PCI Voice Packetizers provide powerful features for building advanced Digital Voice Recorders. Each unit combines a compact form factor with very low power consumption resulting in unmatched reliability.


It uses embedded DSP arrays for D-channel decoding, voice processing and IP packet streaming.

D-channel signalling supports Call Setup, Connect, Clear, DDI number and CLI number decoding. It also supports all major ISDN variants, Q.SIG, DASS-2, DPNSS and various PBX Digital handset D-channel protocols.

Highly secure encrypted IP streaming of the mixed upstream and downstream sides of a conversation.

The speech encoding/compression is 64kbit/s A-law (G.711), 36kbit/s proprietary encoding. The estimated MTBF is 600,000 hours.

Features & benefits

  • Compact aluminium box with telecoms interfaces and 10/100 Mbit/s Ethernet port
  • Non intrusive and undetectable high impedance passive monitoring
  • Dialled number and Caller ID signalling support
  • Digital Signal Processor Arrays for voice streaming and D-channel protocol processing
  • Models for PRI-ISDN, T1-ISDN, BRI-ISDN, Digital handsets and Analog handset / trunk lines
  • 8 channel and 16 channel Analog, Digital handset and 4-wire S0 bus models
  • Fractional, 30 channel and 60 channel PRI-ISDN / E1 models
  • 23 channel and 46 channel T1-ISDN models
  • Protocol support for all major ISDN variants, Q.SIG, DASS-2 and DPNSS.
  • Analog models support DTMF, FSK Caller ID, AGC and speech detection
  • Digital models support all major PBXs with highly accurate DigitalVox start/stop triggering and D-channel support for various PBXs
  • Supports Windows XP SP3, Vista, 7, 8, 10, Server 2003, 2008 and 2012
  • Driver support for all 32-bit and 64-bit Windows versions
  • Remote TCP/IP accessibility for system configuration and FLASH memory upgrading
  • Fully stand-alone embedded operation
  • Redundant power supplies and full hot-swap facility for the plug-in modules
  • 64kbit/s A-law and high quality compressed 36kbit/s speech encoding
  • Supports writing of directly playable WAV files to disk
  • Highly secure encrypted IP streaming
  • Custom IP output formats possible for supporting existing IP Recording systems
  • CE, FCC and RoHS compliance

Technical specifications

Mechanical CharacteristicsCompact aluminium box with external power supply adaptor
Operating temperature0 oC to +60 oC
Humidity5% to 80% non-condensing
Maximum power requirements+5Vdc (400 mA), +12Vdc (50 mA), -12Vdc (50 mA)
Operating Systems supportedAll 32-bit and 64-bit Windows editions
Maximum densityVirtually unlimited, 2000+ ports total

Interface specifications

Primary Rate InterfaceE1 (2.048Mbit/s), T1 (1.544Mbit/s)
AC impedance1100 Ω
Maximum tap length10m (unterminated), 100m (terminated)
ProtocolsAll major ISDN variants, Q.SIG, DASS-2, DPNSS