ISDN Protocol Administrator's and Developer's Guide ... - Intervoice

signalingThe transmission of electrical signals to and from the user’spremises (telephone) and the telephone company central office(switching station). Central office signals include ringing (audiblealerting), dial tone, and speech signals. User telephone signalsinclude off-hook (request for service), dialing (network controlsignaling), speech to the distant party, and on-hook (disconnectsignal).stringA list of alphanumeric characters. In InVision, a string is formattedby enclosing it in single quotation marks—for example, ‘123.45’,‘abc’, or ‘name’. This data type is the most frequently used inInVision.subroutine pageThe InVision application’s .app or .lib page view that contains iconsrepresenting the call flow for a particular subroutine. A subroutinepage exists for each subroutine called and is listed by subroutinename.supplementary serviceAny additional ISDN capability that is provided outside the originalITU-T Q.931 ISDN specification.switchA telecommunications equipment component that establishes androutes communication paths between separate extensions. The termmay refer to a small local switch (PBX), a central office, or aregional office.SwitchWareA feature through which blind call transfer provides connectionbetween inbound and switching (secondary) lines. The SwitchWarefeature requires switching line hardware. It provides outbound portmanagement, call origination, and dialing with or without dial tonedetection. Port-to-port connection facilities are also part of theSwitchWare feature. Basic blind transfers do not require additionalcall progress software.T1A Pulse-Code Modulation carrier facility with 24 voice channelsthat transmits a digital signal at 1.544 Mbps (1,544,000 bits persecond). The United States, Canada, Japan, and Hong Kong use T1;Europe, Asia, and South America use E1. T1 and E1 are notcompatible. See also E1.60001262, First Edition ISDN Protocol Administrator’s and Developer’s Guide Glossary-9