Welltech Dialogic SS7 Protocols ISUP - Manual (Page 180)

Appendix A: ISUP National Variants
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A.8 Finnish ISUP
Finnish ISUP Specification: SFS 5779 Signalling in the public switched
telephone network (PSTN). ISDN User Part ISUP Version 2 of the national
Signalling System No. 7. Application of ITU-T recommendations Q.761. Q.764
and Q.766 in Finland (1994)
Configuration and options
In order to use this feature, ISPGVAR_ITU92 must be set in the ‘variant’ field
in the Configure Circuit Group Request message (see Section
)
8.2 on page
126 and set the circuit group options as recommended for the ‘ITU’ variant
(refer to Appendix D: ISUP Configuration Option Settings on page 193 ).
Messages
Messages specific to Finnish ISUP:
Message Value
Finnish ISUP API
Usage Comments Message
Name
Message
Type
Hex Dec Hex Dec
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
two mandatory
parameters only – the
number of metering
pulses* parameter and
the tariff type* parameter.
* Refer to Section 6.7 on page 80 for details.
A.9 BICC
ITU-T Recommendation Q.1901, Bearer Independent Call Control Protocol
ITU-T Recommendation Q.1902.1, Bearer Independent Call Control protocol
(Capability Set 2): Functional description
Configuration and options
In order to use this feature, ISPGVAR_BICC must be set in the ‘variant’ field
in the
Configure Circuit Group Request message (see Section
)
8.2 on page
126 .
Parameters specific to BICC:
• SIO: BICC has a different SIO from ISUP. While ISUP usually uses 0x05,
BICC usually uses 0x0d. The SIO field in the ISP_MSG_CONFIG (0x7700)
and ISP_MSG_CNF_GRP (0x7701) messages must be set accordingly.
• CIC: The CIC are 32 bits long in BICC. The cic_msb field in the
ISP_MSG_CNF_GRP message represents the two most significant bytes of
the cic (the least significant bytes being represented by the base_cic).
The module constructs the BICC CIC based on the cic_msb, the base_cic
and the cic_mask.
• CIC Control: The priority of cics should be allocated as follows: