QSIG (Q Signaling)

A standard that defines services and signaling protocols for interconnecting

TDM-based PBXs based on the ITU-T ISDN standard Q.931. QSIG is a Common Channel Signaling

(CCS) protocol that runs over the ISDN D-channel for signaling between nodes in a Private Integrated Services Network (PISN). QSIG supports call setup, call teardown, and transparency of features such as message waiting, camp-on, and callback. The ISO (International Organization for Standardization) has adopted QSIG as Private Signaling System No. 1 (PSS1). See also CCS, ISDN, ISO, Q.931, and Q series.

• baud
• Baudot code
• Baudot, Emile (1845–1903)
• baud rate
• BBS (Bulletin Board System)
• B Carrier
• BCC (Block Check Character)
• B channel (Bearer channel)
• BCH (Bose, Chaudhuri, and Hocquengham)
• BCM (Bit Compression Multiplexer)
• beaconing
• beaconing
• beamsplitter
• beamsplitter
• bearer channel (B channel)
• BECN (Backward Explicit Congestion Notification)
• beeper
• bel (B)
• Bell, Alexander Graham (1847–1922)
• Bell Communications Research (Bellcore)
• Bellcore (Bell Communications Research)
• Bell Labs (AT&T Bell Telephone Laboratories)
• Bell Operating Company (BOC)
• Bell System
• Bell System