Справочник Пользователя для Lucent Technologies Release 8.2

369

Administration for Network Connectivity

555-233-504 — Issue 1 — April 2000

CID: 77730

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 
connectivity. 

Meets requirements for the ISO Private Network Generic Functional Procedures 
(ISO standard 11582) for call-related supplementary services. 

Supports call-related supplementary service transport, Abstract Syntax Notation 1 
(ASN.1)/Basic Encoding Rules (BER), and Remote Operation Service Element 
(ROSE) services/protocols.

Provides the Name and Number Identification supplementary service as defined 
by ISO Standards 13864, 13868, and 11572. 

Provides Call Forwarding (Diversion) as defined by ISO Standards 13872 and 
13873.

Provides Call Transfer as defined by ISO Standards 13865 and 13869.

A Temporary Signaling Connection (TSC) provides a temporary signaling path 
through ISDN switches for exchanging supplementary service information (for 
example, exchange Facility Information Elements in call control messages, 
FACILITY messages, or a combination of both on ISDN D-channels. There is no 
B-channel related to the connection; no data or voice transmissions take place. 

There are two types of temporary signaling connections:

Call Associated (CA-TSC)

Non-Call Associated (NCA-TSC)

A CA-TSC refers to a service for exchanging USER INFORMATION messages 
associated with an ISDN B-channel connection by the call reference value of the call 
control data packets. On DEFINITY ECS, this type of TSC is used only for DCS 
features on ISDN-PRI Signaling Groups administered with Supplementary Service 
Protocol a.