Reference:Configuration/BRI/Protocol: Difference between revisions
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== QSIG D-channel protocol: == | == QSIG D-channel protocol: == | ||
This is a standardised signalling method mainly used to interconnect | This is a standardised signalling method mainly used to interconnect traditional PBXs. | ||
Unfortunately, there are several variants of the QSIG standard and various implementations; some conform more and some less to the standard. | Unfortunately, there are several variants of the QSIG standard and various implementations; some conform more and some less to the standard. |
Latest revision as of 17:43, 26 January 2011
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 mainly used to interconnect traditional PBXs.
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: | Using B-channel numbering (1-30) |
QSIG ECMA2: | Using timeslot numbering (1-15, 17-31) |
On T1 interfaces, both variations are identical, as the B-channels 1-23 correspond to timeslots 1-23.
Please note that there are more settings relevant to QSIG on the interfaces Interop page.
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. |