What do the signal indicators mean on my Digi TransPort or Sarian-branded router?
The signal strength is shown in negative dB , which means that the stronger the signal, the lower the number. As a guide -51dB would be a very strong signal, only normally obtained very close to a cell site. -115dB represents no signal. If your router reports -115dB try reorienting the antenna or consider adding an external antenna. On routers equipped with GPRS modules, there are three LED’s on the front panel that will indicate the strength of the signal, as shown in the table below. The minimum recommended strength indication is 2 LED’s. If you have no or 1 LED’s lit, it is recommended that you fit an external antenna to the router.