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SIGnalling TRANSport (SIGTRAN) Stack
Description: OpenSS7 SIGTRAN Stack Design Documentation.
The figure below provides a map to the interface specifications and componetns of the SS7 over IP stack. Click on an interface or a component to see the reference specification and design information related to the component or interface.
- Layer Management Interface (LMI)
- Application Interface (API)
- BICC Interface (BICCI)
- ISUP Interface (ISUPI)
- TCAP Interface (TCAPI)
- SCCP Interface (SCCPI)
- MTP Interface (MTPI)
- Signalling Link Interface (SLI)
SS7 over IP (SIGTRAN) Stack Components
| Component | Status | Reference | Interface Specs |
Design Docs |
Manual Page |
Code | Test Results |
||
|---|---|---|---|---|---|---|---|---|---|
| BUA SS7 BICC-User Adaptation Layer |
status | refs |
bicci(7) cci_bicc(7) |
html | bua(4) | code | html | ||
| ISUA SS7 ISUP-User Adaptation Layer |
status | refs |
isupi(7) cci_isup(7) |
html | isua(4) | code | html | ||
| TUA SS7 TCAP-User Adaptation Layer |
status | refs |
tcapi(7) tpi_tcap(7) xti_tcap(3) tcap_socket(7) |
html | tua(4) | code | html | ||
| SUA SS7 SCCP-User Adaptation Layer |
status | refs |
sccpi(7) npi_sccp(7) tpi_sccp(7) xti_sccp(3) sccp_socket(7) |
html | sua(4) | code | html | ||
| M3UA SS7 MTP3-User Adaptation Layer |
status | refs |
mtpi(7) npi_mtp(7) tpi_mtp(7) xti_mtp(3) mtp_socket(7) |
html | m3ua(4) | code | html | ||
| M2UA SS7 MTP2-User Adaptation Layer |
status | refs |
sli(7) |
html | m2ua(4) | code | html | ||
Note that the M2PA (SS7 MTP2-User Peer-to-peer Adataption Layer) is considered as a pseudo device driver. For more information on M2PA design see "SS7 Device Design."
TALI Components
| Component | Status | Reference | Interface Specs |
Design Docs |
Manual Page |
Code | Test Results |
||
|---|---|---|---|---|---|---|---|---|---|
| TALI Tekelec Adaptation Layer Interface |
status | refs |
mtpi(7) npi_mtp(7) tpi_mtp(7) xti_mtp(3) mtp_socket(7) sccpi(7) npi_sccp(7) tpi_sccp(7) xti_sccp(3) sccp_socket(7) |
html | tali(4) | code | html | ||
SS7 over IP (SIGTRAN) Interface Specifications
With the exception of the SDLI and SDTI (which are driver level interfaces for the SS7 Stack), the SIGTRAN stack uses the same set of interface specifications which are used by SS7 components in the OpenSS7 stack. This permits SIGTRAN UA components to be placed between SS7 stack components without the knowledge of either the upper or lower components. SS7 modules and application run as they would in a stand-alone SS7 stack.
Following is a table listing the pertinent SS7 level interfaces and the primary reference, specifications documentation and header files at each level:
| Interface | Reference (PDF) |
Specification Document |
Manual Page |
Header Files |
|
|---|---|---|---|---|---|
| SLI Signalling Link Interface |
cdi-api.pdf | html | sli(7) |
sli.h sli_ioctl.h |
|
| SLSI Signalling Link Set Interface |
cdi-api.pdf | html |
slsi(7) |
slsi.h slsi_ioctl.h |
|
| MTPI Message Transfer Part Interface |
npi.pdf | html |
mtpi(7) |
mtpi.h mtpi_ioctl.h |
|
| SCCPI Signalling Connection Control Part Interface |
npi.pdf | html |
sccpi(7) |
sccpi.h sccpi_ioctl.h |
|
| TRI TCAP TR-User Interface |
tpi.pdf | html |
tcapi(7) |
tri.h tri_ioctl.h |
|
| TCI TCAP TC-User Interface |
tpi.pdf | html |
tcapi(7) |
tci.h tci_ioctl.h |
|
| ISUPI ISDN User Part Interface |
cci.pdf | html |
isupi(7) |
isupi.h isupi_ioctl.h |
|
| BICCI BICC User Interface |
cci.pdf | html |
bicci(7) |
bicci.h bicci_ioctl.h |
|
| CCI Call Control Interface |
cci.pdf | html | cci.pdf | cci(7) |
cci.h cci_isup.h cci_bicc.h |
| TPI Transport Provider Interface |
tpi.pdf | html | tpi.pdf | tpi(7) |
tpi.h tpi_mtp.h tpi_sccp.h tpi_tcap.h |
| XTI X/Open Transport Interface |
html | xti(3) |
xti.h xti_mtp.h xti_sccp.h xti_tcap.h |
||
| NPI Network Provider Interface |
npi.pdf | html | npi.pdf | npi(7) |
npi.h npi_mtp.h npi_sccp.h |
| XNS Sockets Interface |
html | sockets(3) |
socket.h mtp.h sccp.h tcap.h |
||
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