Typographical and Keystroke Conventions
Matrix E1 Series (1G58x-09 and 1H582-xx) Configuration Guide xxxiii
n.nn A period in numerals signals the decimal point indicator (e.g., 1.75 equals one 
and three fourths). Or, periods used in numerals signal the decimal point in 
Dotted Decimal Notation (DDN) (e.g., 000.000.000.000 in an IP address).
x A lowercase italic x indicates the generic use of a letter (e.g., xxx indicates any 
combination of three alphabetic characters).
n A lowercase italic n indicates the generic use of a number (e.g., 19nn) 
indicates a four-digit number in which the last two digits are unknown).
[ ] Square brackets indicate optional parameters.
{ } Braces indicate required parameters. One or more parameters must be entered.
| A vertical bar indicates a choice in parameters.
[{ | }] Braces and vertical bars within square brackets indicate a required choice 
within an optional element. You do not need to select one. If you do, you have 
some required choices.