DSLA Node is used for testing involving cellular phones, desk phones, analog (POTS) phone lines, ATA’s, PC sound cards (for soft phones), and audio streaming devices.
MultiDSLA uses the DSLAII analog nodes to generate and measure speech and other signals in the analog domain. This method of assessment is largely ‘network agnostic’ because the test system does not need to be aware of the technology in the network – in just the same way that human users of a telephony network do not need to understand the technology in order to use it.
Technical Specs | DSLAIIC | DSLAIIC4 | DSLAIIC6 |
| Channels | 2 | 4 | 6 |
| Dimensions (mm) | 72h x 218w x200d | 85h x 425w x 387d | |
| Net Weight | 3 kg | 7 kg | |
| Power | 100-240V ac 9-18V dc, 12W | 100-240V ac | |
| Operating Temperature Range | -2 to +40°C | ||
| Approvals & Compliance | |||
| Calibration Cycle | 3 Year | ||
| Front Panel Interfaces (per channel pair) | 1 x balanced and floating input (600 ± 0.1 Ω or 1 MΩ) and output (600 ± 0.1 Ω) on 4mm sockets | 1 x 3.5mm jack for control purposes | |
2 x RJ11 Telephone line ports (600 Ω or complex impedance). 2 x RJ22 balanced and floating handset input (10kΩ) and output (25 Ω). Monitor output(s) with switching/mixing of input and output of each channel pair | |||
| Back Panel Interfaces (per channel pair)Back Panel Interfaces (per channel pair) | 1 x 10/100 Mbps Ethernet, IPv4 for each channel pair 1 x RS232 9-way serial for each channel pair 2 x 3.5mm jacks for external synchronisation and control purposes (2 Channel DSLA) | ||
4 x 3.5mm jacks for external synchronisation and control purposes | 2 x 3.5mm jacks for external synchronisation | ||
| Signal Generation | DSLAIIC, DSLAIIC4, & C6 |
|---|---|
| Speech | Any user supplied speech material in wav or PCM format, generated with user defined mean active speech level from -99dBm to +10dBm |
| Sample Rates | 8k, 16k & 32k or 8k, 16k & 48k |
| Sound file output levels | -99dBm to +10dBm |
| Sine & Swept Sine Waves | 20Hz to 22kHz -99dBm to +10dBm any duration |
| Noise | White, Gaussian White, Pink -99dBm to +10dBm any duration |
| DTMF | -99dBm to +10dBm, any duration user definable twist, frequency offset and break duration |
| Complex Mixed Signals | Two independent tracks on each channel to create any complex mixed signals |
| Measurement Performance | DSLAIIC, DSLAIIC4, & DSLAIIC6 |
|---|---|
| Speech Level Measurement | ITU-T P.56 Method B |
| Linearity | Linearity 0.1dB for levels -60 to +10dBm Linearity 0.1dB for frequencies 20Hz to 22 kHz |
| Noise Floor | -85dBm or better |
| Range of measured levels | -75dBm to +19dBm |
| Minimum measurable mean active speech level | -65dBm any duration |
| Dynamic range of balanced inputs | 110dB |
| Double Talk Detection | Percentage of measurement period where speech is present on both channels |
| Synchronization | GPS (time and position) NTP |