How does latency testing work?

Client sets up a number that, once dialled, is placed in ‘echo back’ mode (all audio received is immediately echoed back down the line).

  • Client sets up a number that, once dialled, is placed in ‘echo back’ mode (all audio received is immediately echoed back down the line)
  • The Spearline in-country server dials your Toll or Toll Free contact number using standard ISDN phone lines provided by local carriers in-country (this replicates your customers experience).
  • Spearline server sends 10 pulses of audio from our server in-country, all of which are a slightly different frequency.
  • Spearline will use the different frequencies to pair the tones we send with the tones that are echoed back to us. We then measure the time it takes for each tone to be echoed back to the origination point, thus providing the round-trip latency.
HubSpot Video