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Agilent HP E4209B Cell Protocol Processor
The Agilent E4209B Cell Protocol Processor (CPP) provides real-time and
post-processing protocol testing features for the Agilent Broadband Series
Test System (BSTS). The basic CPP assembly and system software can perform
monitoring and simulation of ATM, F4 and F5 OAM, and AAL1 protocols. Software
required to provide the features described below is provided with the
CPP hardware. Further upper layer testing can be performed using additional
software packages. The CPP can be configured with many different Line
Interfaces at rates from 1.5 to 622 Mb/s, including: Agilent E1616A 1.5/45
Mb/s (DS1/DS3), Agilent E1610A 34 Mb/s (E3), Agilent E1695A 45 Mb/s (DS3),
Agilent E1697A 155 Mb/s (STS-3c/STM-1) Optical, as well as E4219A ATM
Network Impairment Emulation Module.
The CPP can generate up to eight streams of user-defined ATM traffic.
It also provides both real-time and post-processed measurements on ATM
traffic. Measurements are automatically synchronized between devices in
the test session.
User Programming
The CPP supports a C-language UNIX user programming environment.
Test Software Additional test software can be run on the CPP. These packages
provide high layer protocol testing. The following test software is currently
available: AAL Test Software, SMDS Test Software and DXI Test Software.
Features
- Provides protocol monitoring and simulation
- Runs optional test software for additional upper-layer protocol testing
- Generates up to eight streams of user-defined ATM test traffic
- Fast hardware-based cell segmentation and re-assembly
UNIX® is a registered trademark in the United States and
other countries, licensed exclusively through X/Open Company Limited.
Specifications
PDU and PDU Sequence Builder
The Protocol Data Unit (PDU) and PDU Sequence builders
can be used to create, custom-built libraries of predefined traffic. These
libraries can contain ATM cells and AAL1 PDUs. Cells and PDUs can be linked
to form a complex library of sequences. The PDU editor can create, edit,
copy, rename, and delete PDUs.
ATM Cell Editing
Header User defined by field GFC, VPI, VCI, PT, CLP
Interface UNI/NNI selectable
HEC User defined Auto-calculate
Trailer User defined by field
Payload User defined in hex Can be incrementing or decrementing
AAL1 PDU Editing
Header User defined by Field CSI
Sequence Number Protection User defined or auto-calculated
Payload User defined in hex, can be incrementing
Encoding Options
AAL1 PDUs can be automatically encoded down to lower layer
ATM cells. The user specifies the encode options to be applied during
the encoding process.
ATM interface (UNI/NNI)options VPI VCI PT CLP
Traffic Generation
The transmission of the ATM Cells, PDUs and PDU sequences
can be done as a single-shot or as distributed traffic. Single-shot and
distributed traffic can be sent simultaneously.
Single-Shot
In single-shot operation, you can select on PDU or PDU
sequence to be sent.
Cell rate User selectable (0 - 100% of line rate)
Number of cells Up to 2047 unique cells
Encoding AAL1 to ATM cell
Distributed Channels
Up to eight independent traffic streams can be generated
using predefined PDUs and PDU sequences.
Transmission Continuous and repetitive
Number of cells combined 2047 unique cells on all streams
Multiplexing Distributed streams are multiplexed with single-shot traffic
Priority Single-shot takes precedence over distributed traffic; stream
1 has the highest priority
Stream 1 Distribution & Parameters
Constant cell rate (CCR) Mean load
Burst/Max Load Burst gap length
Sawtooth Minimum/maximum load, burst gap length
Poisson Mean cell interarrival time
Streams 2-8
CCR Mean load
Real-Time Measurements
Measurements can be displayed in real-time either numerically
or graphically. These measurements can be recorded to disk in a Lotus
1-2-3 compatible format for storage and later use.
PDU Data Capture
Live PDU data can be captured into memory
Capture capacity 131,072 cells per 8 MB of capture RAM
Capture control event Manually or on a specified trigger
Time stamping All captured data is timestamped with the calendar time
(resolution = 0.1 us)
User Programming
The CPP supports a C-language UNIX user programming environment.
Test Software
Additional test software can be run on the CPP. These
packages provide high layer protocol testing.
Capture Filters
Incoming cells are filtered using up to eight Pattern
Matchers. Real-time filtering determines which cells are kept for analysis.
Receive Streams
Each received cell undergoes the following reassembly
and analysis process. Pattern matcher filtering Error checking Reassembly
Event triggers
Pattern Matchers
Incoming cells are matched against up to eight programmable
patterns. The results are used as inputs to the trigger engine.
Patterns 53 bytecell
Editing forms ATM cells, AAl1
Pattern matching Inverted or non-inverted
Bit matching 0, 1 or wildcard
Trigger Event Engine
A programmable event/action matrix is provided in the
CPP. It is used to trigger actions when specified events are detected.
Actions Start/restart capturing Suspend or stop capturing Capture cells
Increment counter Reset counter Start/restart timer Stop timer Exert external
trigger Start transmitter
Events Pattern match (1-8) Cell received Counter limit reached (programmable
1-65536) Timer expiry (programmable 1-256ms +/- 1 ms) External trigger
input detected Logically ORed combinations of the above Decode errors
Statistical Measurements
Real-time statistics can be calculated on the incoming
cell streams. Total cells received Total unassigned cells Total cells
received on a channel Number of pattern matches
Playback
Event streams can be reconstructed from recorded cell-streams
for off-line analysis using the playback facility. Detection of protocol
errors Filtering Cell and PDU display Results archiving facility
ATM Analysis
Options UNI/NNI selectable
Decode Errors Invalid HEC VPI<>0, VCI=0 As per ITU-T I.361
AAL1 Analysis
Decode information
Sequence CSI
Number Sequence count
SNP CRC-3 Parity
Payload Hex or ASCII display As per ITU-T I.363
OAM F4 and F5 Analysis
OAM Decode information
Flow level F5 VC segment F5 VC end-to-end F4 VP segment F4 VP end-to-end
Cell type Fault & performance management, activation, or deactivation
of user management
Function type AIS, FERF, Continuity check, Forward monitor, Backward monitor,
Monitoring/reporting As per ITU-T I.610 & T1S1.5/92-029R91
Applicable Standards
ITU-T I.361
ITU-T I.363
ITU-T I.610 & T1S1.5/92-029R91
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