Section 700 - Operation Chapter 3. System Features576-50-700 DBS 576 (USA) issued September 2001 3-51QSIG ISDN LinesDescriptionQSIG is a digital signaling protocol for private-network phone systems comprised of ISDN lines.Internationally, it is also called Private Signaling System No. 1 (PSS1).QSIG, developed in the late 1980’s and still in the process of global standardization, provides theability to efficiently interconnect the remote ISDN PBX sites of large organization. Panasonic DBS576 and DBS 576HD systems can be connected over ISDN QSIG lines to create a networked system.For more information on QSIG, see Section 570: QSIG Reference.Hardware Requirements• QSIG (PRI/23) cardRelated Programming• FF2-1: QSIG ISDN LinesConsiderations• See Section 570: QSIG ReferenceRinging ModesDescriptionThe System supports multiple types of CO ringing including the following:• Day 1/Day 2/Night Ringing• Day 1/Day 2/Night Delayed Ringing• Direct Inward Dial (DID) Day/Night Ringing• DID Day/Night Busy/Delayed Ringing• Busy Lamp Field (BLF) Ringing• BLF Delayed Ringing• Slide Ringing• Alarm RingingDay 1/ Day 2/Night RingingWhen the System is in Day 1 mode, calls can be directed to ring at one or more extensions or at a huntgroup per the Day 1 ringing assignments.When the System is in Day 2 mode, calls can be directed to ring at one or more extensions or at a huntgroup per the Day 2 ringing assignments.When the system is in Night mode, call can be directed to ring at one or more extensions or at a huntgroup per the Night ringing assignments.Inbound calls can be directed to desired normal daytime locations by setting the system into a Daymode. By having a second day mode (Day 2) alternative call handling is available during dayoperation. For instance, during lunch, calls can be directed to an alternative position.
