- Brekeke SIP Server Basic Info
- Security
- Update & Upgrade
- Configuration
- Installation
- Basic Setup
- BSS Administration Tool
- Network Configuration
- Dial Plan
- Dial Plan Basics
- Dial Plan Reference
- Matching Patterns functions
- $addr
- $addrPort
- $addrPrefix
- $addrRange
- $addrType
- $alias
- $and
- $body
- $date
- $db
- $dispatcher
- $eval and $e
- $evalRule
- $exist
- $getDisplayName
- $getHost
- $getSIPuser
- $getUri
- $getUriAndParam
- $globalAddr
- $header
- $headerParam
- $hop
- $if
- $ifAddr
- $ipv6
- $isNull
- $isReachable
- $isTalking
- $localhost
- $math
- $mirroring
- $mydomain
- $not
- $nslookup
- $nsreverse
- $or
- $outbound
- $param
- $pb
- $pbx
- $pn
- $port
- $primary
- $radius
- $regAddr
- $regdb
- $registered
- $registeredSender
- $regUa
- $regUri
- $removeParam
- $request
- $rule
- $route
- $sameAddr
- $sdp
- $servertime
- $sessionNum
- $sid
- $soapGet
- $sps
- $stackSize
- $str
- $subParam
- $threadNum
- $time
- $timeRange
- $transport
- $uriParam
- $url
- $usrdir.lookup
- $web.soapGet
- $web.webGet
- $webGet
- $ws
- Deploy Patterns functions
- Deploy Patterns variables
- Matching Patterns functions
- Dial Plan Tutorial
- Dial Plan Examples
- Dial Plan FAQ
- Block List
- Provisioning
- Push Notification
- SDN
- STIR/SHAKEN
- Advanced Edition
- Other Functions
- Third-Party Database
- Environment Variables
- Troubleshooting
- Developer's Guide
- Version History
4.5.2.1.31.$math
The $math functions allow an administrator to compare and manipulate numbers.