[asterisk-users] connecting internal line with external line

Hi, I'm new to asterisk. I want asterisk to connect a external line with an internal line: the PC dials a number and connects this call to a internal telephone (telephone switchboard, based on ISDN, 4 analogue telephones) of my office. Can somebody here give me keyword how to search (e.g.

[asterisk-users] connecting internal line with external line

Hi, I'm new to asterisk. I want asterisk to connect a external line with an internal line: the PC dials a number and connects this call to a internal telephone (telephone switchboard, based on ISDN, 4 analogue telephones) of my office. Can somebody here give me keyword how to search (e.g.