A.5 italian isup, Italian isup – Welltech Dialogic SS7 Protocols ISUP User Manual
Page 176
Appendix A: ISUP National Variants
176
A.5 Italian
ISUP
Italian ISUP Specification: Specifica Tecnica N.763
Configuration and options
In order to use this feature, ISPGVAR_ITAL must be set in the ‘variant’ field
in the
Configure Circuit Group Request
Section
.
For Italian ISUP set the circuit group options as recommended for the ‘ITU’
variant (refer to
Appendix D: ISUP Configuration Option Settings on page
). In addition to these recommended option settings, the ISPGOP_COM
circuit group option (bit 11 in the ‘options’ field) applicable only to Italian
ISUP may also be set (refer to ‘Messages specific to the Italian network‘
below).
Messages
Messages specific to Italian ISUP:
Message Value
Italian ISUP
API
Message
Name
Message
Type
Hex
Dec
Hex
Dec
Usage
Comments
Call
Offering
COM
0xe0
224
0x2c*
44*
The COM message may be
issued by the application for
an outgoing call in the
waiting ANM state. The
ISUP call processing state
machine(s) will change state
to the outgoing answered
state and a Call Offering
Message (COM) will be
issued to the network
In order to use this message,
the ISPGVAR_ITAL variant
need not be set but the
ISPGOP_COM option in the
‘options’ field in the
Configure Circuit Group
Request message must be
set.
To issue a COM message,
the application must issue a
CPG containing the event
information parameter** set
to 0x7e.
On receipt of an
ACM(user busy)
indication, the user
application may request
an intrusion into an
active call by sending a
call offering message
(COM), in which case the
ISUP call processing
state machines will enter
the connected, speech
state.
The COM message has
no mandatory or optional
parameters.
Maps to the CPG*
message (API).
Charge
CRG
0x31
49
0x31
49
The CRG message may be
issued after call setup and
before release in the wait for
ACM i.e. in the answered
and suspended states.
The CRG message has
no mandatory
parameters (see
‘Parameters’ table).
* Refer to
Section
Section
** Refer to
Section
for details.