Agilent Technologies 622Vu Advisor, User Manual

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config.ini
.ini file used by 622Vu Advisor to configure the system at startup, and to determine
various processing preferences.
configuration #5
One of the possible configurations you can establish for a full-end station
analysis device, wherein incoming traffic on Channel 1 goes into the framer chip on the
analysis device and is monitored by 622Vu Advisor (and optionally captured). The analysis
device transmits traffic over Channel 1. This is the normal way to connect to a physical ATM
link in end-station mode, when capturing/transmitting on Channel 1. Incoming traffic on
Channel 2 loops out over Channel 2 without being monitored.
configuration #6
One of the possible configurations you can establish for a full-end station
analysis device, wherein incoming traffic on Channel 1 loops out over Channel 1 without
being monitored. Incoming traffic on Channel 2 goes into the framer chip on the analysis
device and is monitored by 622Vu Advisor (and optionally captured). The analysis device
transmits traffic over Channel 2. This is the normal way to connect to a physical ATM link in
end-station mode, when capturing/transmitting on Channel 2.
configuration #10
One of the possible configurations you can establish for an analysis device,
and always used for a monitor-only device. With this configuration, 622Vu Advisor
automatically monitors the traffic coming in both channels, and retransmits all traffic over the
opposite channel from where it’s received.
connection-oriented
A term referring to the characteristic of ATM that requires an established
connection (channel) before a cell can be sent. This minimizes the overhead involved in
routing traffic from one point to another, because each hop in the transmission only has to
remember how to get to the next point.
Convergence Sublayer (CS)
One of two sublayers in each AAL (ATM Adaptation Layer
protocol), as currently specified by the ITU. The Convergence Sublayer is responsible for
managing the flow of data to and from the Segmentation and Reassembly sublayer. (Looking
one step further, the CS actually comprises two component parts: the Common Part
Convergence Sublayer and the Service Specific Convergence sublayer. The specifics of these
sublayers are not detailed in this glossary.) See ATM Adaptation Layer for more information.
CRC
Cyclical Redundancy Check — Group of closely related mathematical algorithms used to
detect errors in a stream of bits. The HEC (Header Error Control) computation is a form of
CRC, and verifies correct transmission of cell-data. The PDU uses another form of CRC (this
in addition to the CRC (HEC) for each cell), but the specifics of this vary depending on the
type of PDU being sent.
To illustrate, the CRC formula used for an AAL3/4 stream is different from an AAL5: in
AAL3/4, each cell payload has its own CRC, but in AAL5 only the last cell has a CRC, which
checks the entire PDU contents.
CS
See Convergence Sublayer.
datagram One packet of information that’s routed through a network, including both the data
being passed from one host to another and the information necessary to deliver that data
safely.
Device Manager
Component of 622Vu Advisor that lets you configure analysis devices, and/or
monitor the physical interface between an analysis device and the ATM device under test.
DLL
Dynamic Link Library — A Microsoft Windows term referring to a support library for a
product or product set.
DS data rate
Digital Signal data rate: a term referring to the rate of data transmission of a bit
stream across COAX cable (copper wire). Agilent Technologies offers physical-interface
options that support DS3 (44.7362 Mb/s) and DS1 (T1).
end-station mode
One of two ways you can configure an analysis device (contrast monitor
mode). In end-station mode, the 622Vu Advisor is a known, visible end station on the
A: Glossary
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