Installation guide

Dialogic
®
System Release 6.1 CompactPCI for Windows
®
Release Update 49
SIP_STACK_CFG
typedef struct {
unsigned long version; /* version set by INIT_SIP_STACK_CFG */
int retransmissionT1;
int retransmissionT2;
int retransmissionT4;
int generalLingerTimer;
int inviteLingerTimer;
int provisionalTimer;
int cancelGeneralNoResponseTimer;
int cancelInviteNoResponseTimer;
int generalRequestTimeoutTimer;
} SIP_STACK_CFG;
 Description
The SIP_STACK_CFG data structure is used to configure selected SIP stack parameters such as
timers.
The SIP_STACK_CFG data structure is referenced by the IP_VIRTBOARD data structure, which
stores configuration and capability information about an IPT (virtual) board device that is
populated when the device is started. An array of IP_VIRTBOARD structures (one per virtual
board in the system) is referenced by the IPCCLIB_START_DATA structure, which is passed to
the gc_Start( ) function.
Applications should use the INIT_SIP_STACK_CFG( ) function to initialize the structure with
the correct version number and initial field values before setting the appropriate values.
 Field Descriptions
The fields of the SIP_STACK_CFG data structure are:
version
The version number of the data structure. The correct value is set by the
INIT_SIP_STACK_CFG( ) initialization function and should not be overridden.
retransmissionT1
Determines several timers as defined in RFC 3261. For example, when an unreliable transport
protocol is used, a Client Invite transaction retransmits requests at an interval that starts at T1
milliseconds and doubles after every retransmission. A Client General transaction retransmits
requests at an interval that starts at T1 and doubles until it reaches T2. The default value is
1000.
retransmissionT2
Determines the maximum retransmission interval as defined in RFC 3261. For example, when
an unreliable transport protocol is used, general requests are retransmitted at an interval that
starts at T1 and doubles until it reaches T2. If a provisional response is received,
retransmissions continue but at an interval of T2. The parameter value cannot be less than
4000. The default value is 8000.
retransmissionT4
Determines the amount of time the network takes to clear messages between client and server
transactions as defined in RFC 3261. For example, when working with an unreliable transport