Lucent Technologies Release 8.2 manual Qsig Basic Call Setup, Qsig Basic Supplementary Services

QSIG B Private Networking

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 routed.

QSIG Basic Supplementary Services

Called/Busy Name Enables the calling party to see the name of the called party at the following times:

•while the call is ringing at the called party’s terminal.

•while listening to a busy tone because the called party’s terminal was busy.

Called/Busy Name is similar to the display provided for local on-switch calls, as well as for the DCS calls, with the following exceptions:

•Names longer than 15 characters are truncated; only the first 15 characters display.

•The number does not display unless QSIG VALU is enabled.

QSIG Name and Number Identification

QSIG Name and Number Identification allows a switch to send and receive the calling number, calling name, connected number, and connected name. QSIG Name and Number Identification displays up to 15 characters for the calling and connected name and up to 15 digits for the calling and connected number across ISDN interfaces.

You can administer outgoing calls as “yes”, “no”, or “restricted.” Restricted means that DEFINITY ECS sends the information but sends it “presentation restricted,” which indicates to the receiving switch that the information should not be displayed. A received restricted number is included on the Call Detail Record (CDR).

Transit switch information

When DEFINITY ECS acts as a transit switch, the QSIG standards require it to pass on all supplementary service information that is not addressed to it. This includes name information. (A “transit” switch is a switch that routes an incoming call administered for Supplementary Services Protocol Bto a trunk also administered for Supplementary Services Protocol B.) However, Basic Call Setup and number information is subject to modification by the transit switch. This means that trunk group administration on a transit switch does not override incoming name information, but may override incoming number information (as long as this does not lower the restriction on the information).

Example

If a non-restricted calling name and number are received by a DEFINITY ECS acting as a transit switch, and if the outgoing trunk is administered for presentation restricted for both name and number, the number is passed on as “restricted” and name is passed on as “unrestricted.”

Administration for Network Connectivity
555-233-504 — Issue 1 — April 2000	CID: 77730	361