Nokia Net Monitor description (DCT3)

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Test 13 – DTX mode status / toggle (active)

Available in: 2100, 3330, 5110, 6150, 6210, 7110, 8210, 8250

This test allows you to view the DTX (Discontinuous transmission) mode which controls whether the transmitter is switched off when not necessary to save power (i.e. when phone user is not speaking). It also allows the mode to be toggled on or off if the BTS allows it.

Test screen	Help screen

DTXMode: Displays the status of DTX mode. Can be “DTX:ON” (in use), “DTX:OFF” (not in use), “DTX:DEF” (uses default – see next) or “NOTALLOWED” (BTS decides, not MS)

DTX(DEF): MS’s default DTX mode – this is what is used if DTX Mode (above) is set to “DTX:DEF”. Can be “ON” or “OFF”.

DTX(BS): What the BTS says to use (on BCCH(SI3) or SACCH(SI6)) – can be “USE” (must be used), “NOT” (must not be used) or “MAY” (MS can decide)

If the DTX(BS) value is set to “USE” or “NOT” (and hence the DTX mode value will be “NOTALLOWED”) the MS must do that.

If however, the DTX(BS) value is set to “MAY”, then the MS may choose and will use its DTX(DEF) value. However, jumping to this screen will allow you to specify which setting to use. Each jump will toggle between “DTX:ON”, “DTX:OFF” and “DTX:DEF”.

This is useful if you wish to flatten the phone’s battery quickly by disabling DTX and calling a number. Also, it is useful if you are interested in benchmarking talk times with and without DTX.

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WAP-gateway IP: 79.186.244.250
Port: 9201