Conventions

In this book, you will find a number of text styles that distinguish between different kinds of information. Here are some examples of these styles and an explanation of their meaning.

Code words in text, database table names, folder names, filenames, file extensions, pathnames, dummy URLs, user input, and Twitter handles are shown as follows: "It also contains a parameter called branch that identifies this transaction."

A block of code is set as follows:

P-Asserted-Identity: "John" sip:+554833328560@sip.com
P-Asserted-Identity: tel:+554833328560

When we wish to draw your attention to a particular part of a code block, the relevant lines or items are set in bold:

if (is_method("INVITE")) {
  setflag(ACC_DO); # Do accounting
 setflag(ACC_FAILED); # Account failed transactions
}

Any command-line input or output is written as follows:

opensipsctl fifo ps
opensipsctl fifo debug 4

New terms and important words are shown in bold. Words that you see on the screen, for example, in menus or dialog boxes, appear in the text like this: "In the following Select your location screen, choose your location to be used in the installation process."

Note

Warnings or important notes appear in a box like this.

Tip

Tips and tricks appear like this.