Private Integrated Services Network (PISN)
- Inter-Exchange Signalling Protocol - Call Identification and
Call Linkage Additional Network Feature (QSIG-CIDL)
2nd edition (December 2001)
This Standard specifies the signalling protocol for the support
of the Call Identification and Call Linkage additional network
feature (ANF-CIDL) at the Q reference point between Private Integrated
Network services eXchanges (PINXs) connected together within a
Private Integrated Services Network (PISN).
ANF-CIDL is an additional network feature which allows the assignment
of a Global Call Identification (GID) to identify a call end-to-end
over the call route (i.e. between the two end PINXs). As an option,
a Thread Identification (TID) may be assigned to different calls
which are logically linked together due to the operation of other
supplementary services and/or ANFs. Additionally a Leg Identification
(LID) may be assigned, to identify the different legs of a call.
This ANF has been developed to support the use of CSTA (ECMA-269)
in a networked environment, i.e. in a PISN. Use of this ANF for
other applications is not precluded.
The Q reference point is defined in ECMA-133.
Supplementary 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 in ECMA-313.
The signalling protocol for ANF-CIDL 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 Call Identification and Call Linkage and other supplementary
services and ANFs.
This Standard is applicable to PINXs which can be interconnected
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:
||1 065 541
||Acrobat (r) PDF file
This Ecma publication is also approved as ISO/IEC 21889.
The previous replaced "historical" edition of this Ecma Standard is available here.