Lucent Technologies DEFINITY Enterprise Communications Server Release 5, CallVisor, ASAI Protocol Reference Instructions Manual

Codeset 6 Information Elements
Issue 6  June 1997
4-45
If the length of the contents is greater than 127 bytes, then the long form of the 
length of the contents is used. The long form length, in the ECS/ASAI, is two 
bytes.
3 Bit 8 of the first byte is coded 1, and bits 1 to 7 of the first byte encode a 
number on less than the size of the length in bytes as an unsigned binary number 
whose MSB and LSB are bits 7 and 1, respectively. The length itself is encoded as 
an unsigned binary number whose MSB...

Information Elements
4-46Issue 6  June 1997 
Invoke Identifier Tags
An invoke identifier is used to identify an operation invocation and is present in the 
return result or return error response. When a protocol problem occurs with an 
FIE component, a Reject component contains the invoke-id of the problem 
component if it can be obtained. If the invoke-id cannot be ascertained, the Reject 
component contains a null invoke-id. Invoke identifiers are one byte long. The null 
invoke-id has zero length....

Codeset 6 Information Elements
Issue 6  June 1997
4-47
Sequence Value Tag
The Return Result component contains a sequence value tag when an Operation 
Value and result are present. The sequence Value Tag, Operation Value Tag, and 
(non-null) result must all be present together, or absent from a Return Result 
component. Table 4-13 shows the encoding for the sequence tag.
Operation Value
The Operation Value specifies the ASAI capability being requested or responded 
to. Values are identified in bytes 12...

Information Elements
4-48Issue 6  June 1997 
Table 4-14. Operation Value/Error Value Coding
ASAI Operation Value 87654321
Third Party Make Call 10000011
Third Party Answer 10000100
Third Party Selective Hold 1 0 0 0 0 1 0 1
Third Party Reconnect 10000110
Third Party Transfer NOT USED10000111
Third Party Selective Drop 10001000
Third Party Merge 1 0 0 0 1 0 0 1
Event Notification Request 1 0 0 0 1 0 1 0
Reserved 10001011
Value Query 10001100
Set Value 10001101
Request Feature 1 0 0 0 1 1 1 1...

Codeset 6 Information Elements
Issue 6  June 1997
4-49
Error Value Tag
Error reporting is specific to each capability. Table 4-15 shows the ASAI coding 
for the error value tag.
Error Value
The error value is always encoded to be the Operation Value of the requested 
service that returned the error. Table 4-15 shows these encodings.
Problem Tag
The problem tag found in the Reject component supplies information about why 
an FIE was rejected. The possible protocol problems are divided into related...

Information Elements
4-50Issue 6  June 1997 
General Problem:
Table 4-16. Problem Tag Coding
87654321
General problem 1 0 0 0 0 0 0 0
Invoke problem 10000001
Return Result problem10000010
Return Error problem 10000011
Table 4-17. General Problem Coding
87654321
Unrecognized component 0 0 0 0 0 0 0 0
Mistyped component 0 0 0 0 0 0 0 1
Badly structured component 0 0 0 0 0 0 1 0
Unrecognized component The component type tag is not a 
value in Table 4-9.
Mistyped component A mandatory part of the component...

Codeset 6 Information Elements
Issue 6  June 1997
4-51
Return Result problem:
Invoke-problem: Unrecognized invocation: The Invoke-id in a Return Result 
component is not an active 
Invoke-id; for example, there is no 
such operation in progress.
Result response unexpected: The Invoke-id in a Return Result 
component corresponds to an 
operation for which a Return result 
is not expected.
Mistyped result Indicates the type of the result 
argument used is not the “Q.931 IE 
tag” shown in Figure 4-25.
Table...

Information Elements
4-52Issue 6  June 1997 
Return Error problem:
Using Existing Q.931 IEs as Parameters
All ASAI capabilities pass Q.931 IEs as parameters within the FIE parameters 
field. When Q.931 information elements (codesets 0 and 6) are parameters for a 
component, an X.209 data element encapsulates them, thereby retaining the 
Q.931 coding for these information elements. However, ASAI prohibits 
encapsulation of an FIE in this manner. The Q.931 information elements are 
grouped by codeset, and...

Codeset 6 Information Elements
Issue 6  June 1997
4-53
Figure 4-25. Encapsulation of Q.931 Information Elements
87654321
01000000
Q.931 information elements tag
Q.931 information elements length
(X.209 encoded -- see section “Length of Each Component or Contents”)
First Q.931 information element
Second Q.931 information element
.
.
.
.
Last Q.931 information element 

Information Elements
4-54Issue 6  June 1997 
Feature
The Feature IE shown in Figure 4-26 specifies which feature is being requested. It 
is also used to indicate the availability of a feature in a Call Offered Event Report. 
(Currently, only Flexible Billing is supplied.)
 
Figure 4-26. Feature Information Element8  7654321
Feature
0  1001000Byte1
Information element identifier
Length of Feature contents 2
1
Feature               3
Ext
ASAI FeatureBits
Encodings:7 6 5 4 3 2 1
0 0 0 0 0 0 0 Reserved
0 0 0...