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Preliminary/Postliminary Scripting Call Server Configuration
Polycom, Inc. 255
The following table shows how different dial rule actions apply a preliminary
script’s modified dial string to the output SIP headers in a SIP call.
CALLER_SITE_NAME The name of the caller’s site.
CALLER_SITE_SITE
_CODE
The site code of the caller’s site.
CALLER_TEL_URI Array variable initially set to the set of Tel URI
addresses of the caller. The length of the array is 0
if the caller doesn’t have a Tel URI address.
DIAL_STRING Initially set to the dial string being evaluated. If the
script modifies the DIAL_STRING value, the
modified value is used as the input to the dial rule
action.
For SIP, when the DIAL_STRING is modified by the
script, it’s used as shown in Table 10 -11 , depending
on the dial rule action:
INPUT_SIP_HEADERS For SIP calls only, an associative array containing
the SIP headers in the received SIP INVITE
message.
Usage example:
if(INPUT_SIP_HEADERS["Supported"].matches
(/.*ms-forking.*/))
{
...
}
OUTPUT_SIP_HEADERS An empty associative array. Headers that the script
adds to this array replace the corresponding
headers in the received SIP INVITE message. If a
header added to this array isn’t in the received
INVITE message, it’s added to the INVITE
message.
Usage example:
OUTPUT_SIP_HEADERS["User-Agent"] =
"Someone. Not a DMA 7000.";
OUTPUT_SIP_HEADERS["Some-Custom-Header"]
= "Whatever you want";
Table 10-10 Predefined variables for preliminary and postliminary scripts (continued)
Variable Initial value