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

Contents
Issue  6 June 1997xxi
World-Class Routing (ARS/AAR), Incoming Call 
Routed over Outgoing ISDN Trunk Group, 
Charge Information Provided during the Call B-169
n22. Miscellaneous Cases B-170
Unsuccessful Requests for Domain
(Station) Control B-170
ISDN Network Congestion B-172
Invalid Call Destination— Reorder B-173
User Does Not Go Off-hook B-174
Extension Removed B-174
Invalid Association Requests B-175
Invalid Call_id Numbers B-176
Invalid Station Numbers B-177
IN Index IN-1 

Contents
xxiiIssue  6 June 1997  

Issue 6 June 1997xxvii
About This Document
This manual provides detailed protocol information for the CallVisor® 
Adjunct/Switch Application Interface for DEFINITY® Enterprise Communications 
Server Release 5. (In the interest of brevity, CallVisor ASAI is referred to as ASAI 
throughout the remainder of this manual.)
Reason for Reissue
This document has been updated with new features up to Release 5.5.
Terminology
See the glossary included in the DEFINITY Enterprise Communications Server 
CallVisor ASAI...

About This Document
xxviiiIssue 6 June 1997 
NOTE:
See Related Documents that follows for a list of documents that provide 
information on ECS features and ASAI functionality.
Related Documents
Adjunct/Switch Application Interface (ASAI) Specification, 555-025-203
The ASAI Specification document provides a detailed description of the ASAI 
Reference Model. The Reference Model contains all the capabilities available with 
ASAI.
DEFINITY Communications System CallVisor ASAI Planning Guide, 555-230-222...

Related Documents
Issue 6 June 1997
xxix
The Administration and Feature Descriptions document serves as an overall 
reference for the planning, operation, and administration of Release 5 for 
DEFINITY ECS.
DEFINITY Enterprise Communications Server Release 5 Implementation, 
555-230-302
This manual documents the implementation of the DEFINITY ECS.
ISDN Basic Rate Interface (BRI) Specification, 801-802-100
This technical reference provides detailed information about the physical interface 
structure and...

About This Document
xxxIssue 6 June 1997  

Issue 6  June 19971-1
1
Introduction to Layer 3 Protocol
This chapter introduces the layer 3 protocol by explaining how the ISDN 
messages, Facility Information Elements (FIEs), and Information Elements (IEs) 
work together to implement ASAI. Message sequences and detailed encoding 
information are provided. 

Introduction to Layer 3 Protocol
1-2Issue 6  June 1997 
ASAI Association
An ASAI association is an exchange of one or more messages on the Integrated 
Services Digital Network Basic Rate Interface (ISDN BRI) signaling channel 
(D-channel) or on an Ethernet interface between the ECS and the adjunct.
To start an association, the initiating endpoint assigns an idle ISDN Call 
Reference Value (CRV) and places it into an initiating message that is sent to the 
serving endpoint.   When the serving endpoint...

ISDN Call Reference Values (CRVs)
Issue 6  June 1997
1-3
ISDN Call Reference Values (CRVs)
ASAI endpoints use ISDN Call Reference Values (CRVs) to associate the 
sequence of messages carried on an ASAI association. CRVs map one-to-one to 
ASAI associations and each CRV carries information for only one ASAI 
association, regardless of how many capabilities are invoked during the 
association. CRVs are unique on an ASAI link and are present in every ASAI 
message sent across the interface.
The originating...

Introduction to Layer 3 Protocol
1-4Issue 6  June 1997 
nRouting
When the ECS requests routing information for a call using a given CRV, 
the adjunct returns the route on that same CRV.
nRequest Features
The request and response for the ECS feature invocation use the same 
CRV.
nValue Queries
The request and response for queries use the same CRV.
nSet Value
Both the request and response for the Set Value capability use the same 
CRV.
nAudits
The adjunct may request an audit operation over a CRV. The ECS...