Altigen AltiView Manual page 50

Forwarding All Calls
If you want to forward calls to an external number, select a trunk access
code in the drop-down list, then begin with the outside trunk or route access
digit and any long distance prefix digits such as 1 and area code.
Forwarding to a Pager Not Recommended
Forwarding calls to a pager is possible but not recommended since callers
will only hear what is heard when calling a pager and might not know to
enter a return phone number unless instructed.
Do Not Disturb
If you select Enable Do Not Disturb, all incoming calls are forwarded
according to your "Enable Busy Call Handling" settings, described
immediately below.
Note: Selecting Enable Do Not Disturb here has the same effect as
clicking the DND button on the dial pad.
Busy Call Handling and No Answer Handling
You can use these options to specify how you want to handle incoming
calls when you're already on the phone or when you can't answer the
phone, for example, when you've enabled Do Not Disturb.
If you want to use the Auto Attendant and you don't know the number of
the phrase or menu you want to use, check with your system administrator.
Place call in queue is available only if your system administrator has
enabled queueing for you.
Number of Rings Before Forwarding
This setting pertains to almost all the options in this window: the number
of times the phone should ring before the system decides to forward the call
to an extension, voice mail, or the Auto Attendant.
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