Aastra 4420 IP Basic (SIP) for MX-ONE User Guide Manual do Utilizador descarregar pdf (Página 12)

Important User Information

Dialog 4420 IP Basic12

Ring signals

Three different ring signals inform you about the type of the

incoming call. The signals shown in this section are the most used

signals worldwide. Many markets use signals that are adapted for

the local standards. If you get a signal that is not described or you

cannot identify, ask your system administrator.

Internal ring signal

External ring signal

Recall signal

(Callback reminder)

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Aastra 4420 IP Basic (SIP) for MX-ONE User Guide Manual do Utilizador Página 12