Customizing Your Phone53You can configure multiple line keys associated with an account. This enhances callvisualization and simplifies call handling. If this is the case, the LCD screen couldresemble the following figure:Incoming calls to this line will be distributed evenly among the available line keys.Similarly, outgoing calls will be distributed.Your phone can be configured to have a combination of lines with a single line key andlines with multiple line keys.Dial plan is a string of characters that governs the way your SIP-T28P IP phone processesthe inputs received from your phone keypad. The SIP-T28P IP phone supports thefollowing dial plan features: Replace Rule Dial-now Area Code Block OutThe basic expression syntax you need to know:.The dot "." can be used as a placeholder or multiple placeholders for anycharacter. Example:"12." would match "123", "1234", "12345", "12abc", etc.x An "x" can be used as a placeholder for any character. Example:"12x" would match "121", "122", "123", "12a", etc.[]The square brackets "[]"can be used as a placeholder for a single characterwhich matches any of a set of characters. Example:"91[5-7]1234" would match "9151234", "9161234", "9171234", etc.()The parentheses "( )"can be used to group together patterns, for instance, tologically combine two or more patterns. Example:“91([5-7])1(x)” would match “91511”, “91618”, “91715”, etc.$ The “$” should be followed by the sequence number of a parenthesis. The