hold

A voice telephone system (Centrex, KTS, or PBX) feature that enables a user to place an existing call in a suspended state simply by depressing the hold feature button, with a holding indication usually in the form of a blinking light next to the associated line. The user can reconnect the call at any time by depressing the button associated with the line on hold. In a KTS environment, any user can retrieve the held call from any telephone set where the line appears unless the primary user placed the call on exclusive hold, also known as I-hold, which often is initiated by depressing the hold button twice. See also Centrex, KTS, and PBX.

74570c08.qxd 9/11/07 12:22 PM Page 228

• injection fiber
• input/output (I/O)
• INRIA (National de Recherche en Informatique et en Automatique)
• insertion gain
• insertion loss
• inside plant (ISP)
• inside vapor deposition (IVD)
• inside wire and cable
• Instant Messaging and Presence (IMP)
• Instant Messaging and Presence Protocol (IMPP)
• Instant Messaging and Presence Protocol (IMPP)
• instant messaging (IM)
• Institute of Electronic and Electrical Engineers (IEEE)
• Institute of Electronic and Electrical Engineers (IEEE)
• Insulated Cable Engineers Association (ICEA)
• insulation
• insulator
• insure
• integrated access device (IAD)
• integrated circuit
• integrated messaging
• integrated services digital network (ISDN)
• Integrated Services LAN (ISLAN)
• intellectual property
• intelligent network (IN)