Sony DT310 Manual Do Utilizador

The mailbox system controls the messages that are left for or sent by you when you are 
absent. See section ”Mailbox system”.

A message can be sent to any extension. This is useful when you receive the busy tone 
or get no answer. There are two kinds of message: 1.”Call me” message. 2. Voice 
message. See section ”Internal messages”.

To switch the microphone temporarily off. See section ”During calls”.

A four-digit code needed to e.g. block your extension and retrieve messages from the 
mailbox system. You can set your own password. See section ”Security”. 

Public Branch Exchange. Your telephone switching system (e.g. BusinessPhone 250).

Pre-programmed absent information. See section ”Information”.

A third connection (person), which can be included in an ongoing two person 
conversation. The connection can be internal or external. See section ”During calls”.

An external line from the private network.

During an internal or external ongoing call you can make an inquiry and then 
transfer the call to another party (internal or external). 
See section ”During calls” and ”Useful hints”.

A trunk line is the same as an external line. Can be either digital or analogue.