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Brekeke SIP Server Wiki

  1. Brekeke SIP Server Basic Info
  2. Security
  3. Update & Upgrade
  4. Configuration
    1. Installation
    2. Basic Setup
    3. BSS Administration Tool
    4. Network Configuration
    5. Dial Plan
      1. Dial Plan Basics
      2. Dial Plan Reference
        1. Matching Patterns functions
          1. $addr
          2. $addrPort
          3. $addrPrefix
          4. $addrRange
          5. $addrType
          6. $alias
          7. $and
          8. $body
          9. $date
          10. $db
          11. $dispatcher
          12. $eval and $e
          13. $evalRule
          14. $exist
          15. $getDisplayName
          16. $getHost
          17. $getSIPuser
          18. $getUri
          19. $getUriAndParam
          20. $globalAddr
          21. $header
          22. $headerParam
          23. $hop
          24. $if
          25. $ifAddr
          26. $ipv6
          27. $isNull
          28. $isReachable
          29. $isTalking
          30. $localhost
          31. $math
            1. $math.dec
            2. $math.eval
            3. $math.ge
            4. $math.gt
            5. $math.inc
            6. $math.lt
            7. $math.le
            8. $math.max
            9. $math.min
            10. $math.rand
            11. $math.range
          32. $mirroring
          33. $mydomain
          34. $not
          35. $nslookup
          36. $nsreverse
          37. $or
          38. $outbound
          39. $param
          40. $pb
          41. $pbx
          42. $pn
          43. $port
          44. $primary
          45. $radius
          46. $regAddr
          47. $regdb
          48. $registered
          49. $registeredSender
          50. $regUa
          51. $regUri
          52. $removeParam
          53. $request
          54. $rule
          55. $route
          56. $sameAddr
          57. $sdp
          58. $servertime
          59. $sessionNum
          60. $sid
          61. $soapGet
          62. $sps
          63. $stackSize
          64. $str
          65. $subParam
          66. $threadNum
          67. $time
          68. $timeRange
          69. $transport
          70. $uriParam
          71. $url
          72. $usrdir.lookup
          73. $web.soapGet
          74. $web.webGet
          75. $webGet
          76. $ws
        2. Deploy Patterns functions
        3. Deploy Patterns variables
      3. Dial Plan Tutorial
      4. Dial Plan Examples
      5. Dial Plan FAQ
    6. Block List
    7. Provisioning
    8. Push Notification
    9. SDN
    10. STIR/SHAKEN
    11. Advanced Edition
    12. Other Functions
    13. Third-Party Database
    14. Environment Variables
  5. Troubleshooting
  6. Developer's Guide
  7. Version History

$math.dec

Decrement the number by 1.

Syntax:
$math.dec( num )
Parameters:
num – number
Returns:

a decremented value

 

Version Since:

1.0

 

Where the function can be used:
  • Preliminary rules
  • Regular rules

 

Example:
$math.dec( $getSIPuser(To) ) = (.+)

Decrement the dialed number

See Also:

$math.inc

Yes No
« $math$math.eval »
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