Reference:Configuration/BRI/Protocol: Difference between revisions
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Revision as of 18:04, 15 November 2007
The signaling protocol for the ISDN interface is configured here.
Euro ISDN D-channel protocol:
| EDSS1: | This type of signalling has gained worldwide acceptance for ISDN subscribers and, despite the name, is also common outside Europe. |
QSIG D-channel protocol:
This is a standardised signalling method that is mainly used to connect PBXs. Here, basic call and tunnelling are supported by the gateways. This allows, in particular, homogeneous PBX systems to be linked with QSIG (1 byte), in which manufacturer-specific properties are exchanged via QSIG. Unfortunately, there are several variants of the QSIG standard and various implementations; some conform more and some less to the standard.
The gateways therefore support two different variants.
| QSIG ECMA1: | Numbering of the channels from 1-30 (2 bytes) |
| QSIG ECMA2: | Numbering of the channels from 1-15, 17-21 (2 bytes) |
US D-channel protocol:
| NI: | USA (National ISDN 1) |
| 5ESS: | USA (AT&T) |
| DMS100: | USA (new standard) |
Mode:
| Point-to-Point: | Switches on the point-to-point connection. |
| Point-to-Multipoint: | Switches on the point-to-multipoint connection. |