Applications
Autonomous network server VOCORD LD8 is designed for parallel connection to 8 two-wire digital subscriber lines (DSL) of PBXs and PSTN, and can be used to input, decode, process and broadcast DSL data via Ethernet (TCP/IP).
Description
The VOCORD LD8 is an autonomous device for parallel or serial connection to digital subscriber lines of PBXs and PSTN. It is designed to perform input/output, decoding, processing and broadcasting over TCP/IP networks of the information transmitted via such lines. VOCORD LD8 is controlled by an embedded Linux operating system and comprises a VOCORD D8 board installed into a VOCORD-LD chassis. VOCORD LD8 is connected into a LAN/WAN network via an embedded Ethernet 10/100 Mbps adapter. The VOCORD system controls all functions of the board and receives the information via a global TCP/IP network (including the Internet).
VOCORD LD8 has the following components:
- 4 digital signalling processors for high quality software implementation of DSL protocols
- 1 Ethernet port, 10/100 Mbps Full Duplex
- RISC processor for implementation of algorithms for input/output and interaction beween DSPs and central processor software
- 4 channels, DMA Bus Master 132 МBps
Technical Specifications
| Parameter | Value |
|---|---|
| Signal sources | Digital PBX (U-interfaces): • Nortel: Meridian/ NorStar/ Compact ICS/ Modular • Siemens Hicom (all protocols: Up0, Up0e, U200) • Avaya Definity (IT&T, Lucent) • Ericsson BusinessPhone/ MD110 • NEC NEAX 7400, 2400, 2000 • Panasonic DCS, KXTD-500 • Tadiran Coral • LG: GDK/Starex • Alcatel 4xxx/ Omni • Teltronics (Harris 20-20) (Optic 1, Optic 10) • Samsung: NX/ DCS • eOn Communications Millennium • ISDN BRI (ITU-T I.430), Q.921, Q931 |
| Number of channels | 8 (half duplex for DSL); 4 (duplex for ISDN BRI 2B1D); 32 DECT |
| PC interface | PCI 2.3 32 bit up to 66 MHz |
| Board computing resources | 32 MB SDRAM on controlling RISC processor |
| Form Factor | PCI Full-Size, Half-Size |
| Input resistance for parallel connection | 10 KOhm |
| Input insulation breakdown voltage | > 1000 V |
| External Interface parameters | |
| Input signal | +3 V, frequency [0; 3] MHz, constant. Bias up to 60 V (DC) |
| Input resistance | 10 KOhm (AC), not less than 1 MOhm (DC) |
| Adapter | RJ45/RJ48 |
| Connection type | parallel/ serial |
| Signal processing functions | |
| Number of channels of HDLC detector and/or of D-channel decoder | maximum 4, one per line |
| Number of audio recording channels (direct and reverse B-channels) mono/stereo | 4, maximum 8 per line |
| Number of DTMF detector channels | 8 0 |
| Number of DSP | 4, 8 |
| Audio compression algorithms | G.711, G.723, G.728, G.729a, G.729b, G.723.1, G.726; GSM-FR, -HR, -EFR, -AMR. The same format as used in a line. |
| Controlling processor | |
| Processor type | PowerPC405 |
| Built-in operating system | Embedded Linux kernel 2.4+ |
| LAN | Ethernet 10/100 Mb/s |
| TCI/IP | Linux Net 4.0 |
| Power supply | |
| +5 V (DC) | Not greater than 0.6A |
| +12 V (DC) | Not greater than 0.1A |
| -12 V (DC) | Not greater than 0. 05 A |
| +3 V (DC) | Not used |
| Temperature and Humidity conditions | |
| For operation | From 0 to +40°C with humidity from 10 to 80% without condensation |
| For storage | From -10 to +80°C with humidity from 10 to 80% without condensation |
Additional Features
- Detection of line(s) connection / disconnection
- Independent software configuring of each channel for specific U/S-interface
- Automatic adjustment of synchronisation parameters and input signal volumes
- Reduced sensitivity to CMS interference
