CREDIT_TIME_SIP_HEADER

CREDIT_TIME_SIP_HEADER specifies the header name of the remaining credit time value (in seconds), which is sent inside SIP message.

See details here: Display of Remaining Credit Time (Parse SIP headers).

The remaining credit time is encoded inside SIP response message to INVITE request, for example:

SIP/2.0 200 OK
CSeq: 2 INVITE
From: ...
To: ...
Credit-time: 1200

In above example, SIP message contains a custom header "Credit-time", which is added by billing system. It has value 1200 seconds.

In above example installer-brand.nsi should contain following value:

!define CREDIT_TIME_SIP_HEADER       "Credit-time"