The Echo PCI Voice Recording boards are designed for medium to large organisation. Each card only occupies a single standard 5V PCI slot and combines a compact form factor with very low power consumption.
On-board DSPs and large streaming buffers impose very little demand on system and application resources.
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. This means that simultaneous recording on all channels of both upstream and downstream sides of a conversation is possible.
The speech encoding/compression used is 64kbit/s A-law (G.711), 36kbit/s proprietary encoding. The estimated MTBF is 600,000 hours.
| Mechanical characteristics | Half length PCI card |
| Operating temperature | 0 oC to +60 oC |
| Humidity | 5% to 80% non-condensing |
| Maximum power requirements | +5Vdc (400 mA), +12Vdc (50 mA), -12Vdc (50 mA) |
| Operating Systems supported | All 32-bit and 64-bit Windows editions |
| Maximum density | Up to 12 cards or 720 ports per chassis |
| Rate | E1 (2.048Mb/s), T1 (1.544Mb/s) |
| AC Impedance | 1100Ω |
| Maximum tap length | 100m (Terminated), 10m (Unterminated) |
| Protocol support | All major ISDN variants: Q.SIG, DASS-2, DPNSS |
| Type | 4-wire S0 bus |
| AC Impedance | Line matched |
| Maximum tap length | 500m |
| Protocol support | Euro-ISDN |
| Type | 4-wire S0 bus |
| AC Impedance | Line matched |
| Maximum tap length | 500m |
| Protocol support | Euro-ISDN |