Lucent Technologies DEFINITY Enterprise Communications Server Release 8.2 Administration For Network Connectivity Instructions Manual

QSIG 
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QSIG Basic Call Setup
Transit Counter 
(ANF–TC) DEFINITY ECS provides QSIG ANF-TC as defined in ISO/IEC 6B032 and 6B033. 
It prevents indefinite looping, connections giving poor transmission performance, and 
inefficient use of network resources.
ANF-TC is invoked automatically for ISDN basic calls and the Route Pattern form 
indicates the number of switches through which a call may be...

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Tandem switch information
However, in the case of tandemed calls (calls involving two ISDN trunks that are not 
both administered for Supplementary Service Protocol B), trunk group administration 
may override both incoming name and number information, as long as doing so does 
not lower the restriction on the information. For example, a tandemed call that comes 
in with restricted name...

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Call OfferThis feature is the QSIG equivalent of Call Waiting. 
A Private Telecommunication Network (PTN) offers up to four ways of invoking 
QSIG Supplementary Service - Call Offer (SS-CO) (listed below). DEFINITY ECS 
uses only the first way.
•Network invocation (immediate) — the PTN automatically invokes SS-CO 
whenever the calling user makes a call to a user that is busy, if required...

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An analog voice terminal user activates SS-CCBS or SS-CCNR by pressing the Recall 
button or flashing the switchhook and then dialing the Automatic Callback (ACB) 
Activation feature access code. An analog user can activate only one ACB call at any 
given time.
A multiappearance voice terminal user can activate SS-CCBS or SS-CCNR for the 
number of ACB buttons assigned to the terminal....

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Other QSIG Centralized Messaging
With a QSIG centralized messaging system, the remote switch is called a served user 
switch. When an AUDIX system supports a QSIG network, the served user switch 
does not need to be a DEFINITY ECS, but the host, or message center, switch must 
be. 
QSIG allows a DEFINITY switch to be a served user switch of a non-DEFINITY 
message center switch. Therefore,...

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Path RetentionPath Retention is a generic mechanism for retaining a network connection that can be 
used by supplementary services during call establishment.
The Originating PBX invokes path retention for one supplementary service or for 
several simultaneous supplementary services. Invoking a particular supplementary 
service means retaining the network connection if the Terminating PBX...

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QSIG CAS functions in RLT-CAS
The following QSIG-CAS functions are currently in RLT-CAS:
•Attendant-seeking calls at a branch reach the attendant at the main
•Attendant splitting away and calling the extended to party
•Night Service
•Monitoring agents, per attendant group
QSIG CAS functions not in RLT CAS
The following QSIG-CAS functions are currently not in RLT-CAS:
•Announcements for...

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QSIG Call Forwarding 
(Diversion with 
Rerouting) This feature allows a forwarded call can be rerouted in a private network to find a 
more cost-effective or resource-efficient path.
QSIG Transfer into Lucent QSIG Voice Mail
Transfer into QSIG 
Voice MailThis feature uses QSIG Call Transfer, along with a manufacturer-specific information 
(MSI) message, to transfer a call directly into a...

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QSIG Protocols
QSIG signaling protocols are based on ITU-T (formerly CCITT) Q.931 access 
protocols across the Q reference point. QSIG standards are also supported by the 
ISDN Private Networking Specification (IPNS) Forum. DEFINITY ECS QSIG 
complies with a number of international regulations. For example, QSIG:
•Complies with ISO standard 11572 for layer 3 to support private-network...

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NCA-TSCAn NCA-TSC is a connection not related with any ISDN B-channel connections. 
DECINITY ECS supports two types of NCA-TSC that conform to two different 
protocol standards:
•The non-QSIG AT&T type of NCA-TSC is used for the DCS over ISDN-PRI 
D-channel and DCS AUDIX applications. Only ISDN-PRI Signaling Groups 
administered with Supplementary Service Protocol a support AT&T NCA-TSCs....