Our Echo Array is a Very High Density Voice Packetizer for building large scale PRI / E1 based TDM Voice Recording systems.


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

The rugged design, low power consumption, redundant power supplies and TDM module hot-swap facility results in unmatched reliability.

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 and DPNSS.

It has 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

  • 3U and 7U height 19" rackmount models with respectively 40 and 80 PRI / E1 interfaces (1200 and 2400 TDM channels)
  • 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
  • Supports Windows XP SP3, Vista, 7, 8, 10, Server 2003, 2008 and 2012
  • 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 Characteristics3U or 7U height 19" rack
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

PRI specifications

RateE1 (2.048Mb/s), T1 (1.544Mb/s)
AC Impedance1100Ω
Maximum tap length100m (Terminated), 10m (Unterminated)
Protocol supportAll major ISDN variants: Q.SIG, DASS-2, DPNSS