Reference:Configuration/BRI/Protocol: Difference between revisions

Revision as of 18:15, 15 November 2007

The signaling protocol for the ISDN interface is configured here.

EDSS1:

This type of signalling has gained worldwide acceptance for ISDN subscribers and, despite the name, is also common outside Europe.

This is a standardised signalling method mainly used to interconnect tarditional 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, 17-21)

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.

Point-to-Point:	Switches on the point-to-point connection.
Point-to-Multipoint:	Switches on the point-to-multipoint connection.

@@ Line 9: / Line 9: @@
 == 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.
+This is a standardised signalling method mainly used to interconnect tarditional 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.
+The gateways therefore support two different variants:
 {|
 |valign=top nowrap=true|'''QSIG ECMA1:'''
-| Numbering of the channels from 1-30 (2 bytes)
+| Using B-channel numbering (1-30)
 |-
 |valign=top nowrap=true|'''QSIG ECMA2:'''
-| Numbering of the channels from 1-15, 17-21 (2 bytes)
+| Using timeslot numbering (1-15, 17-21)
 |}
+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 [[Reference:Configuration/PRI/Interop| interfaces ''Interop'' page]].
 == US D-channel protocol: ==