Session variables

Last Updated : Sep 01, 2026 |
Prolog information
Variable
Description
Applicable For
%DIRECTION
Value can be:
  • INBOUND: For incoming messages
  • OUTBOUND: For outgoing messages from SBC
act on message
act on request
act on response
%ENTRY_POINT
Values can be:
  • PRE_ROUTING
  • POST_ROUTING
  • AFTER_NETWORK
    The AFTER_NETWORK variable value is valid only within server configuration and not within server flow.
act on message
act on request
act on response
%METHOD
Values can be:
  • INVITE
  • REGISTER
  • ACK
  • PRACK
  • BYE
  • CANCEL, and
  • etc
The method name can be any method either already part of standards or proprietary.
%METHOD
%IN_DIALOG
Values can be: TRUE or FALSE. This value indicates if the given message is a in-dialog message or a dialog creating message.
act on request
%RESP_CODE
Values can be from 100 to 600. This value represents a valid SIP response code.
act on response
%REQ_METHOD
Same as METHOD. But this value represents the method that the given response corresponds to.
act on response