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15-4 NCAUUI
Note: Octets 5, 6, and 7 are considered optional and do not affect the
request of NCAUUI service. Octet 5 is ignored if it is received in a
NCAUUI request message. Octets 6 and 7 may be included by the user in
NCAUUI requests. However, the DMS-250 switch ignores Octet 6 and
Octet 7.
Octet
NCAUUI Invocation Positive Acknowledgment
A positive acknowledgment for an NCAUUI request is the Q.931 CONNect
message.
If the terminating ISDN user positively acknowledges the request for
NCAUUI with the Q.931 CONNect message, the terminating DMS-250
switch formulates and sends a Q.931 CONNect ACKnowledge message to
the terminating ISDN user and an SCCP Connection Confirm (CC) message
to the originating switch.
If the Non-Call Associated Temporary Signaling Connection (NCA-TSC)
request receives a positive acknowledgment at the far end, the originating
switch receives an SCCP CC message. Then, a TSC is established between
the originating switch and the terminating switch. Once the originating
switch receives the SCCP CC message, the originating switch sends a Q.931
297-2521-106 Standard 23.01 March 2001
ISDN PRI Bearer Capability Information
Bit
7
8
1
0
0
Length of Bearer Capability Information
2
0
3
1
Coding Standard
Transfer Mode
4
1 Ext
1
(Packet Mode)
Multiplier/
Layer Id.
5
1
0
1
(Layer 1 Id.)
Multiplier/
1
6
Layer Id.
1
0
(Layer 2 Id.)
Multiplier/
7
1
Layer Id.
1
1
(Layer 3 Id.)
Element
6
5
4
Bearer Capability
0
0
0
Information Element Identifier
0
0
1
Information Transfer Capability
Information Transfer Rate
0
0
0
(Used only for Packet Mode)
User Information Layer 1 Protocol
0
0
User Information Layer 2 Protocol
0
0
(Recommendation Q.921)
User Information Layer 3 Protocol
0
0
(Recommendation Q.931)
3
2
1
0
0
0
Element
0
0
0
0
0
0
0
1
0
0
1
0
0
1
0
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