Soft carriage Return

A soft break or soft return is a carriage return automatically inserted by the software program usually because of a word wrap. Soft returns allow you to continue typing without having to press the return key manually at the end of each line. The picture shows an example of soft returns with formatting marks enabled. The soft returns look like an arrow that goes down and then points to the left, much like the arrow seen on the enter key.

In the picture above blue line indicate hard carriage return and red soft carriage return.

Narrowband ISDN

The first generation of ISDN is called as a narrowband ISDN and it is based on the use of 64 kbps channel as the basic unit of switching and has a circuit switching orientation. The main device in the narrowband ISDN is the frame relay. The second generation of ISDN is referred to as the broadband ISDN (B-ISDN).

Trunk in networking

Trunk

Trunk (Branches between exchanges) in networking is links which enables to connect many clients from a network through sharing a medium or wire frequency we can take example of tree for better understand of trunk.
Tree has a root and many branches whose fulfill their requirement from root.

A trunk is a single transmission channel between two points, each point being either the switching center or the node.

Telephone Local Loop

What is a 'Local Loop'?

The Local Loop in a telephone network (sometimes referred to as the "last mile" of the network) is
the bit that connects your home to your local telephone exchange. It refers literally to the copper
cables that run from your home to the telephone exchange.