Parameter: Sub-System Number
The Sub-System Number parameter is used to assign a sub-system number to an object within the SS7 SCCP control layer.
Integer values for this parameter are entered into a field.
Allowable values are from 1 to 255.
| SSN value | SSN SCCP user | Description |
|---|---|---|
| 0 | Unknown | SSN not known or not used. |
| 1 | SCCP management | SCCP management |
| 3 | ISUP | ISDN user part |
| 4 | OMAP | Operation, Maintenance and Administration Part |
| 5 | MAP | Mobile Application Part |
| 6 | HLR | Home Location Register (MAP) |
| 7 | VLR | Visitor Location Register (MAP) |
| 8 | MSC | Mobile Switching Center (MAP) |
| 9 | EIR | Equipment Identifier Register (MAP) |
| 10 | AUC | Authentication Center |
| 11 | ISDN supplementary | ISDN Supplementary services |
| 13 | BISDNE2EAPP | Broadband ISDN Edge-to-Edge Application |
| 14 | TCTR | TC Test Responder |
| 142 | RANAP | Radio Access Network Application Part |
| 143 | RNSAP | Radio Network Subsystem Application Part |
| 145 | GMLC | Gateway Mobile Location Centre (MAP) |
| 146 | CAP | CAMEL application part |
| 147 | gsmSCF | Global System for Mobile Service Control Function (MAP) |
| 148 | SIWF | Serving GPRS Support Node (MAP) |
| 149 | SGSN | Serving GPRS Support Node (MAP) |
| 150 | GGSN | Gateway GPRS Support Node (MAP) |
| 249 | PCAP | Positioning Calculation Application Part |
| 250 | BSC BSSAP | BSC Base Station System Application Part (BSSAP-LE) |
| 251 | MSC BSSAP | MSC Base Station System Application Part (BSSAP-LE) |
| 252 | SMLC BSSAP | Serving Mobile Location Center (BSSAP-LE) |
| 253 | BSSOM | Base Station System Operation & Maintenance (A-interface) |
| 254 | BSSAP | Base Station System Application Part (A-interface) |