ADNOS, Dynamic Numbering
  1. User guide
    1. 1 Overview
    2. 2 Getting started
      1. 2.1 Connecting
      2. 2.2 A simple overlay
      3. 2.3 Moving an overlay
      4. 2.4 Canceling an overlay
      5. 2.5 Overlaying multiple numbers
      6. 2.6 What next
    3. 3 A more advanced overlay
      1. 3.1 Call announcements
      2. 3.2 Call recordings
      3. 3.3 Advertisers
      4. 3.4 Expiry options
        1. 3.4.1 Setting an expiry
        2. 3.4.2 Enforcing the expiry
        3. 3.4.3 The called extension
      5. 3.5 Restricting calls
        1. 3.5.1 Who can call
        2. 3.5.2 The length of calls
        3. 3.5.3 The number of calls
    4. 4 Advertisers functions
      1. 4.1 Create an advertiser
      2. 4.2 List advertisers
      3. 4.3 Edit an advertiser
    5. 5 Sound file functions
      1. 5.1 Pre-call anouncements
        1. 5.1.1 Create an announcement
        2. 5.1.2 List announcements
        3. 5.1.3 Edit an announcement
        4. 5.1.4 Delete an announcement
      2. 5.2 Call recordings
        1. 5.2.1 Get recordings
    6. 6 Statistical functions
      1. 6.1 Call statistics
        1. 6.1.1 Raw statistics
        2. 6.1.2 Grouped statistics
      2. 6.2 Overlay statistics
        1. 6.2.1 Count your overlays
        2. 6.2.2 List your overlays
      3. 6.3 Real time reporting
    7. 7 Miscellaneous functions
      1. 7.1 Check values
        1. 7.1.1 List number types
        2. 7.1.2 List number classes
        3. 7.1.3 Check a parameter
      2. 7.2 Check settings
        1. 7.2.1 Check your permissions
        2. 7.2.2 Check your settings
        3. 7.2.3 Check call costs
        4. 7.2.4 Check costs for a call
      3. 7.3 Check previous requests
        1. 7.3.1 Count previous requests
        2. 7.3.2 List previous requests
        3. 7.3.3 View request details
    8. 8 Glossary

3.5.1 Who can call

It may be that you don't want everyone to be able to dial a particular overlay. Perhaps a user is paying for calls to an destination, or perhaps a number is for a busy member of staff who should not be bothered by every call. By restricting the dialing number allowed to make a call, you can lock down who is allowed to use an overlay.

Example

A customer needs the phone number of a senior member of staff, you do not want this number to become generally available. It would be possible to create an overlay and use the expiry options to ensure that it is not valid for long, but that would still allow calls through in the short term, additionally, the customer may want to use this number for a long time. Fortunately, you know what number the customer will call from, so it is possible to reject calls that do not come from that source. To do this, provide the 'cli' parameter in addition to any other requirements.