Aastra 4420 IP Basic (SIP) for MX-ONE User Guide Manual do Utilizador descarregar pdf (Página 18)

Outgoing Calls

Dialog 4420 IP Basic18

Monitoring

You can monitor the progress of an outgoing call.

With the handset on hook:

z Dial the number.

Press

When the other party answers:

u Lift the handset.

Press to terminate a monitor call.

SOS calls (Emergency calls)

Note: The number for SOS calls might vary between

countries.

z Dial the SOS number.

Press

If this feature is enabled it is still possible to make an emergency

call even if the status lamp is lit. If a dialtone is heard it is possible to

make the call.

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Aastra 4420 IP Basic (SIP) for MX-ONE User Guide Manual do Utilizador Página 18