The following table describes the event initialization routines and function combinations used to send various ISUP protocol messages. When applicable, the value required for the evntType argument to the function is shown.
Message type |
Mnemonic |
Event initialization routine |
Function |
Address complete |
ACM |
evntType = ADDRCMPLT | |
Answer |
ANM |
||
Application transport message |
APM |
none |
evntType = APPTRANSPORT |
Blocking (not supported by BICC) |
BLO |
none |
evntType = CIRBLKREQ |
Blocking acknowledgment (not supported by BICC) |
BLA |
none |
evntType = CIRBLKRSP |
Call modification complete |
CMC |
none |
evntType = MODCMPLT |
Call modification reject |
CMRJ |
none |
evntType = MODREJ |
Call modification request |
CMR |
none |
evntType = MODIFY |
Call progress |
CPG |
evntType = PROGRESS | |
Charge information |
CRG |
none |
Unsupported. |
Circuit group blocking |
CGB |
none |
evntType = CIRGRPBLKREQ |
Circuit group blocking acknowledgment |
CGBA |
none |
evntType = CIRGRPBLKRSP |
Circuit group query |
CQM |
none |
evntType = CIRGRPQRYREQ |
Circuit group query response |
CQR |
none |
Generated automatically by ISUP task. |
Circuit group reset |
GRS |
none |
evntType = CIRGRPRESREQ |
Circuit group reset acknowledgment |
GRA |
none |
Generated automatically by ISUP task. |
Circuit group unblocking |
CGU |
none |
evntType = CIRGRPUNBLKREQ |
Circuit group unblocking acknowledgment |
CGUA |
none |
evntType = CIRGRPUNBLKRSP |
Circuit reservation |
CRM |
evntType = CIRRESERVE | |
Circuit reservation acknowledgment |
CRA |
none |
evntType = CIRRESERVEACK |
Circuit validation response |
CVR |
none |
Generated automatically by ISUP task. |
Circuit validation test |
CVT |
none |
(ISUP management functions) |
Confusion |
CFN |
none |
Generated automatically by ISUP task. |
Connect |
CON |
||
Continuity |
COT |
evntType = CONTREP | |
Continuity check request (not supported by BICC |
CCR |
none |
evntType = CONTCHK |
Delayed release |
DRS |
none |
Unsupported. |
Exit |
EXM |
none |
Generated automatically by ISUP task. |
Facility |
FAC |
evntType = FACILITY | |
Facility accepted |
FAA |
evntType = FACILITYACC | |
Facility reject |
FRJ |
evntType = FACILITYREJ | |
Facility request |
FAR |
evntType = FACILITYREQ | |
Facility deactivate |
FAR |
evntType = FACILITYDEACT | |
Facility information |
FAR |
evntType = FACILITYINFO | |
Forward transfer |
FOT |
evntType = FRWDTRSFR | |
Identification request |
IDM |
none |
evntType = IDENTRSP |
Identification response |
IDR |
none |
evntType = IDENTREQ |
Information |
INF |
evntType = INFORMATION | |
Information request |
INR |
evntType = INFORMATREQ | |
Initial address |
IAM |
||
Loop prevention |
LOP |
none |
evntType = LOOPPREVENTION |
Loopback acknowledgment (not supported by BICC) |
LPA |
none |
evntType = LOOPBCKACK |
Network resource manager |
NRM |
none |
evntType = NETRESMGR |
Overload (not supported by BICC) |
OLM |
none |
Generated automatically by ISUP task. |
Pass-along (not supported by BICC) |
PAM |
|
|
Pre-release information |
PRI |
none |
evntType = PRERELEASE |
Release |
REL |
||
Release complete |
RLC |
none |
|
Reset circuit |
RSC |
none |
evntType = CIRRESREQ |
Resume |
RES |
||
Subsequent address |
SAM |
evntType = SUBSADDR | |
Suspend |
SUS |
||
Unblocking (not supported by BICC) |
UBL |
none |
evntType = CIRUNBLKREQ |
Unblocking acknowledgment (not supported by BICC) |
UBA |
none |
evntType = CIRUNBLKRSP |
Unequipped circuit identification code |
UCIC |
none |
Generated automatically by ISUP task. |
User part available (not supported by BICC) |
UPA |
none |
Generated automatically by ISUP task. |
User part test (not supported by BICC) |
UPT |
none |
Generated automatically by ISUP task. |
User-to-user information |
USR |
none |