Isdn Qsig-Bc And Qsig-Gf Compliance Update; Qsig Basic Call Compliance Update - Nortel Meridian Meridian 1 Feature Description And Administration

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QSIG Basic Call Compliance Update

553-2901-301 Standard 9.00 January 2002

ISDN QSIG-BC and QSIG-GF Compliance Update

The ISDN QSIG-BC and QSIG-GF Compliance Update feature is compliant
with the following European standards documents for QSIG:
• ETS 300-172, fourth edition (1997)
• ETS 300-239, second edition
Initially, support for the ISDN QSIG interface and the basic call capability
was introduced. This version of the interface was based on the ETS 300-172,
first edition (1990) document.
Later, the QSIG-GF Transport interface was introduced, in accordance with
the ETS 300-239 (1993) standard document. The basic call functionality was
upgraded to be compliant with the second edition of the ETS 300-172
document.
Comprehension required IEs
When an incoming Information Element (IE) coded "comprehension
required" is not recognized, the system treats the message the same way it
treats messages with a mandatory information element missing. A message is
sent back with cause 96 "mandatory information element missing." The
messages returned are shown in Table 69.
Table 69
Unrecognized "comprehension required IE" treatment
Incoming message
SETUP
DISCONNECT
RELEASE
RELEASE COMPLETE
Other
Note 1: The message is treated as if it is received with cause 31 "Normal,
unspecified."
Message returned
RELEASE COMPLETE with cause 96
RELEASE with cause 96
RELEASE COMPLETE with cause 96
No message is returned (see note 1)
STATUS with cause 96