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Icon Information
The following icons are available through this manual:
Caution: indicates situations that could cause damage to your terminal.
Note: indicates tips that can help you make better use of your terminal.
Term Explanation
Key Operation
Short press: to press a key and release it quickly.
Long press: to press and hold down a key for above 1.5 seconds.
Hold down: to press a key and remain holding it down.
Individual Call
Individual call is a simplex or duplex call initiated by a single user to another user,
involving the calling party and the called party only.
Group Call
Group call is a simplex call initiated by a single user to a group of users, involving the
calling party and all the group members.
Telephone Call
Telephone call is usually a full duplex call initiated between PT580H Plus F4 and a
PSTN subscriber (such as telephone user or mobile phone user).
To send or receive telephone calls, the terminal must operate in TMO mode, and
must be authorized to access public network through PSTN gateway. Telephone call
is a network service. For more details and availability of the service, please contact
your service provider.
Emergency Call
Emergency call has the highest priority, and is very helpful for the user to request help
when emergency occurs. Generally, it is set to group call type. Emergency call can
break off any non-emergency calls in progress.
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