Voice and Data Cross Training--
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Voice For Data PeopleHow Voice Started: history and lore- Central Office - Power over Local Loop - On/Off Hook Basic Analog Voice Functions - BORSHT - Signaling via Dialing Switching and Call Routing - Switch hierarchy - Phone number address space; E.164 Performance Measurements - Mean Opinion Score, sound quality - Loss in volume - Echo and Cancellation Digital Voice - Channel Bank - Voice Encoding Methods Signaling - Robbed Bit - Common Channel - Signaling System 7 |
Data for Voice PeopleData basics- Data Characters: ASCII - Modes: Sync vs. Async vs. Isoc - Circuit vs. Packet Protocols and Stacks - MX.25 for voice signaling - X.25 for data - TCP/IP - Many others Data Transmission Methods - Copper cable - Optical Fiber - Radio Links Data Addressing - Local/Global - Layers of addresses Circuit Switching - Electrical - Optical Packet Switching - Packet Headers - Store and forward - Encapsulation Connection Routing for data packets - Network Discovery - Topology Updates - Path Calculation and Selection Performance Parameters - Availability - Packet loss ratio - Latency - Jitter |
VoIP for EveryoneVoIP Telephony Model- Network as switch - Call routing server - Call function server(s) 'Talk Path' transport Signaling concepts for VoIP - Registration of devices - Authorization of users - Admission control of calls - Route selection - Call setup - Call teardown Types of signaling protocols H.323 - Gateway control - The Gatekeeper - Choice of Modes Session Initiation Protocol - Multiple applications/media - Proxies - Directory servers - Route finding MGCP/Megaco - Gateway controller - For IP phones End Devices - IP phones - Soft phones - Local gateways - Major gateways Security - Firewall issues - E911/location services Performance measures |