Supported Signaling Protocols
| Protocol | Description |
|---|---|
| DSS1 | Digital Subscriber Signaling System No.1 |
| DMS100 | Digital Multiplex System 100 |
| NI2 | National ISDN No.2 |
| 5ESS | 5 Electronic Switching System |
| QSIG | ECMA's protocol for Private Integrated Services Networks |
IMPORTANT:
In North America, the official standard is National ISDN2 (NI2).
Virtually all 5ESS, DMS100, and GTD-5 switches have been upgraded to use that standard since
the early 2000's.The "5ESS" and "DMS100" Signaling Properties settings are provided only for
backwards compatibility only with older switches and PBXes, and might not support some
functionalities such as Calling Name Delivery.