Aastra OpenPhone 73 User Guide - Page 52
Blocked/Unblocked Call Numbers, 2.2.11 DTMF Postdial/VF Signalling, 2.2.12 Keypad Dialling
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Telephoning General Functions Initiating a Hands-Free Call Instead of lifting the handset, press the open-listening/hands-free key L. End the call by pressing the hands-free/open-listening key again. 2.2.10 Blocked/Unblocked Call Numbers Your telephone can be blocked from dialling all or selected external numbers. Emergency numbers can be entered in a special list, irrespective of your trunk line access rights, and so always be dialled. Consult your system administrator for details. For the System Administrator: Blocked and unblocked call numbers are managed in the Configurator, menu PBX Configuration: Lists. 2.2.11 DTMF Postdial/VF Signalling In the connection state your telephone is automatically set to VF (voice frequency) signalling. You can use this, for example, to query an answering machine or a voice mailbox. 2.2.12 Keypad Dialling A number of European network operators need the keypad protocol to set features (in Germany, for example, for the "Completion of Call on No Reply" (CCNR) feature). Depending on your system configuration your telephone could be set to keypad dialling during the connection state. If this is not the case, you must switch your telephone over to the keypad protocol - before dialling - and enter the code digits specified by the network operator. These are transmitted directly to the exchange and evaluated there. You usually get an announcement as an acknowledgement. Consult your system administrator if you have questions concerning this function. 50