Private Integrated Services Network (PISN)
- Inter-Exchange Signalling Protocol - Wireless Terminal Call
Handling Additional Network Features (QSIG-WTMCH)
2nd edition (December 2001)
This Standard specifies the signalling protocol for the support
of the Wireless terminal call handling additional network features
(ANF-WTMI and ANF-WTMO) at the Q reference point between Private
Integrated services Network eXchanges (PINX) connected together
within a Private Integrated Services Network (PISN).
ANF-WTMI is a feature that directs incoming calls to a WTMI user
within the PISN regardless of the WTMI user's geographical location
within the PISN, provided that the WTMI user's location is known.
Roaming outside the PISN is outside the scope of this edition
of this Standard.
ANF-WTMO permits the PISN to process call requests from a WTMO
user at the home location, if required.
The Q reference point is defined in ECMA-133.
Service specifications are produced in three stages and according
to the method specified in ITU-T Rec. I.130. 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 ANF-WTMI and ANF-WTMO operates on
top of the signalling protocol for basic circuit switched call
control, as specified in ECMA-143,
and uses certain aspects of the generic procedures for the control
of supplementary services specified in ECMA-165.
This Standard also specifies additional signalling protocol requirements
for the support of interactions at the Q reference point between
ANF-WTMI / ANF-WTMO and other supplementary services and ANFs.
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:
||1 089 058
||Acrobat (r) PDF file
This Ecma publication is also approved as ISO/IEC 15431.
The previous replaced "historical" edition of this Ecma Standard is available here.