ZyXEL ISG50-PSTN User Guide - Page 543

Chapter 34 Call Services Each field is described in the following table. Table 198 Configuration > PBX > Call Service > Call Block LABEL Enable Anonymous block Black list Add Edit Remove # Number DESCRIPTION Select this to block calls without caller ID from being routed by the ISG50. Clear it to allow any incoming calls routed by the ISG50. Select Disable to turn call blocking off on the ISG50. Select Enable to turn on call blocking on the ISG50. When you select Enable, use the table that displays to set up a list of phone numbers that are not allowed to call into the ISG50. Click this to create a new entry. Select an entry and click Add to create a new entry after the selected entry. Double-click an entry or select it and click Edit to modify it. To remove an entry, select it and click Remove. The ISG50 confirms you want to remove it before doing so. This field is a sequential value, and it is not associated with a specific entry. This is a telephone number the ISG50 blocks from calling extensions in your telephone network. When adding or editing an entry, type the telephone number. You can also use the letters X, Z and N to represent numbers you want to block. The letter "X" represents any digit from 0-9, Z any digit from 1-9 and N any digit from 2-9. For example, enter 023XXXXXX to block any 9 digit number that starts with 023 from calling the extensions configured on the ISG50. Apply Cancel Furthermore, you can use the period (.) as a wildcard, to block any numbers that begin with a pattern of digits you specify. For example, enter 555. to block any numbers starting with the string 555 from calling the extensions configured on the ISG50. Click this to save your changes. Click this to set every field in this screen to its last-saved value. ISG50 User's Guide 543