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)|
|DMS100:||USA (new standard)|
|Point-to-Point:||Switches on the point-to-point connection.|
|Point-to-Multipoint:||Switches on the point-to-multipoint connection.|