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Multi-Tech Systems MultiVOIP Model Mvp400/800 Standalone Voice/ip Gateway User Guide
Multi-Tech Systems MultiVOIP Model Mvp400/800 Standalone Voice/ip Gateway User Guide
Here you can view all the pages of manual Multi-Tech Systems MultiVOIP Model Mvp400/800 Standalone Voice/ip Gateway User Guide. The Multi-Tech Systems manuals for Communications System are available online for free. You can easily download all the documents as PDF.
Page 81
81 Glossary Handshaking: A process that two modems go through at the time of call setup to establish synchronization over the data communications link. It is a synchronization and negotiation process accomplished by the exchange of predefined, mutually recognized control codes. High-level Data Link Control (HDLC): An ISO standard, bit-oriented data communications protocol that provides nearly error-free data transfers. I Hexadecimal: A base 16 numbering system used to represent binary values. Hex...
Page 82
82 MultiVOIP User Guide Line Coding: The representation of 1s and 0s on a T1 line. The two methods of line coding commonly used, B8ZS and AMI, differ in the restrictions placed on user data. T1 line coding ensures that sufficient timing information is sent with the digital signal to ensure recovery of all the bits at the far end. Timing information on the T1 line is included in the form of 1s in the data stream; a long string of 0s in the data stream could cause problems recovering the data. Line...
Page 83
83 Glossary NAK (Negative Acknowledgment): Communications code used to indicate that a message was not properly received, or that a terminal does not wish to transmit. Contrast with ACK. Network: A group of computers connected by cables or other means and using software that enables them to share equipment, such as printers and disk drives to exchange information. Node: Any point within a network which has been assigned an address. O Object-Orientated: A method for structuring programs as...
Page 84
84 MultiVOIP User Guide Primitive: An abstract representation of interaction across the access points indicating that information is being passed between the service user and the service provider. The OSI Reference Model defines four types of primitives: Request, Indication, Response and Confirm. Private Branch Exchange (PBX): A telephone exchange located on the customers premises. The PBX provides a circuit switching facility for telephone extension lines within the building, and access to the...
Page 85
85 Glossary RS232-C: An EIA standard for a serial interface between computers and peripheral devices (modem, mouse, etc.). It uses a 25-pin DB-25, or a 9-pin DB-9 connector. The RS-232 standard defines the purposes, electrical characteristics and timing of the signals for each of the 25 lines. RS-422: The EIA standard for a balanced interface with no accompanying physical connector. RS-422 products can use screw terminals, DB-9, various DB-25, and DB-37 connectors. RS-530: The EIA standard for the...
Page 86
86 MultiVOIP User Guide T1: A digital transmission link capable of 1.544M bps. T1 uses two pairs of normal UTP, and can handle 24 voice conversations, each digitized at 64K bps. T1 is a standard for digital transmission in the U.S., Canada, Japan and Hong Kong. T1 is the access method for high- speed services such as ATM, frame relay, and SMDS. See also T Carrier, T1 line and FT1. T1 Channel Tests: A set of diagnostics that vary by carrier, used to verify a T1 channel operation. Can include Tone,...
Page 87
87 Glossary V V.25bis: An ITU-T standard for synchronous communications between a mainframe or host and a modem using HDLC or other character- oriented protocol. V.54: The ITU-T standard for local and remote loopback tests in modems, DCEs and DTEs. The four basic tests are: local digital loopback (tests DTE send and receive circuits), local analog loopback (tests local modem operation), remote analog loopback (tests comm link to the remote modem), and remote digital loopback (tests remote...
Page 88
88 MultiVOIP User Guide Index A Archie .................................................................... 71 B Back Panel ............................................................ 12 C Collision ................................................................. 11 Command Connector ............................................ 12 Configuration Port Setup ....................................... 40 Configuration Utilities ............................................ 40 Connectors Command...