Private Integrated Services Network (PISN)
- Inter-Exchange Signalling Protocol - Message Waiting Indication
Supplementary Service (QSIG-MWI)
4th edition (December 2001)
This Standard specifies the signalling protocol for the support
of the Message Waiting Indication supplementary service (SS-MWI)
at the Q reference point between Private Integrated services Network
eXchanges (PINXs) connected together within a Private Integrated
Services Network (PISN).
The supplementary service MWI enables a Served User to be sent
a Message Waiting Indication and also enables this Message Waiting
Indication to be cancelled. The Served User may also be permitted
to interrogate the Message Centre for any Message Waiting Indication.
The Q reference point is defined in ECMA-133.
Service specifications are produced in three stages and according
to the method specified in ETS 300 387. This Standard contains
the stage 3 specification for the Q reference point and satisfies
the requirements identified by the stage 1 and stage 2 specifications
The signalling protocol for SS-MWI uses certain aspects of the
generic procedures for the control of supplementary services specified
This Standard also specifies additional signalling protocol requirements
for the support of interactions at the Q reference point between
SS-MWI and other supplementary services and ANFs.
Additional interactions that have no impact on the signalling
protocol at the Q reference point can be found in the relevant
stage 1 specifications.
This Standard is applicable to PINXs which can interconnect
to form a PISN.
The protocol defined in this Standard forms part of the PSS1
protocol (informally known as QSIG).
The following file can be freely downloaded:
||Acrobat (r) PDF file
This Ecma publication is also approved as ISO/IEC 15506.
The previous replaced "historical" editions of this Ecma Standard are available here.