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Introduction to ATM. Adobe Type Manager Air Traffic Management Amateur Telescope Makers Anti-Therapeutic Medicine Association of Teachers of Mathematics Asynchronous Transfer Mode Automatic Teller Machine. Time Division Multiplexing Synchronous Transfer Mode. 1: Compressed Audio.
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Introduction to ATM • Adobe Type Manager • Air Traffic Management • Amateur Telescope Makers • Anti-Therapeutic Medicine • Association of Teachers of Mathematics • Asynchronous Transfer Mode • Automatic Teller Machine
Time Division MultiplexingSynchronous Transfer Mode 1: Compressed Audio 2: Idle voice 3: Data 4: Idle Voice 5: Full voice 6: Full voice
Asynchronous Transfer Mode 1: Compressed Audio 2: Idle voice 3: Data 4: Idle Voice 5: Full voice 6: Full voice
Voice over ATM phones X X phones X ATM VC
Voice over ATM • Circuit emulation service (CES / AAL1) • Fixed # services e.g. 24 • Voice Telephony over ATM(VTOA/AAL2) • Supports signalling • > service speed X #attached phones (multiplex)
Private-Private Network InterfacePNNI • Abstracted network view • OSPF running out of band, • or manual hierarchy • Source routing • PNNI prefixed network address and hierarchy • Recalculated on entry to PNNI subnetwork
Problems • # entries in cross connection tables in interior switches • # entries in VC termination, MPOA tables at edge devices • managing the statistical nature on a per flow basis across a huge network