Analogue (DSLA)

Digital Speech Level Analyser
Analog & Cellular Nodes

Universal node for any voice network access technology

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.


  •  A call is made between handset and telephone (or two handsets, handset and laptop, etc.)
  • Speech signal is injected into A and passes through the network
  • Received signal at B is captured and analysed
  • Analysis provides MOS estimate, delay, received speech level, etc.
  • The process is repeated for the other direction and other voice(s)
  • MultiDSLA Controller sequences tests and displays/stores results




Phase Pacific supplies and supports

Opale MultiDSLA – Voice & Audio Performance Assessment

Cellular Voice Quality Testing

Analog Voice Quality Testing

IP Phone Voice Quality Testing

Analog Pots to VoIP Quality Testing

  • The Digital Level Speech Analyser, or DSLA is available in a 2 Channel, 4 Channel (C4), and a 6 Channel (C6) configuration.
  • DSLA nodes incorporate several interfaces:
    • Telephone,
    • Handset,
    • 4-wire balanced analog interfaces (2-Channel version only)
  • The C4 and C6 are rack-mountable and share the same features as the 2 Channel unit, except the 4-wire ports.
  • DSLA offers the highest quality analog interfaces available, yielding precise measurements of the device or network under test.
  • DSLA has a small footprint, can be free-standing or rack mounted, and has no external controls or adjustments – making it ideal for deployment in customer premises, for example.
  • DSLA utilizes GPS for accurate measurements of one-way delay between remote locations and to give location/time records for drive test applications.


Phase Pacific

Exchange Tower
Level 1, 530 Little Collins St
Melbourne VIC 3000

ABN 48 104 026 191