3Com S200 manual About Packet Assembler/Disassembler

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About Packet Assembler/Disassembler

About Packet Assembler/Disassembler

What is a PAD?

A Packet Assembler/Disassembler, or PAD for short, gives you network access and

 

 

ensures compatibility between different hosts and terminals and a packet switched

 

 

network. A PAD does this by packetizing data (Assembling), sent to the PAD from a

 

 

terminal device, and then routing that packetized data through a packet switching

 

 

node and onto the network.

 

 

A PAD can also ‘depacketize’ (Disassemble) data before it is sent to its intended

 

 

destination (host or terminal).

What Is a PAD

 

A PAD port lets you transmit asynchronous data. When setting the Port Type to PAD,

Port?

the remainder of the Port Record will contain only those parameters needed for

 

 

configuring the PAD port.

 

 

In this record, you can configure a PAD port for:

 

 

•

Autocalling

 

 

•

Autospeed

 

 

•

Address blanking

What is an ATPAD

 

The ATPAD is an asynchronous port that lets you make and clear X.25 calls using a

 

 

restricted set of Hayes AT commands.

Features

 

PAD ports provide these features:

 

 

• A set of commands to make and clear calls

 

 

• A set of response codes that indicate the generation condition

 

 

• Other features such as configurable control characters, data forwarding

 

 

 

criteria, and answer mode for tailoring the ATPAD to your application

 

 

• Support for network parity, response delay, and DTR timeout

 

 

• Configurable Escape Sequence Timer

 

 

• Automatic or manual answer

 

 

• Four stored X.25 addresses (mnemonics) accessible by the ATDSn command

 

 

• Control signal or XON/XOFF flow control

 

 

•

Configuration of op erating parameters via the CTP

 

 

 

 

2

Configuring PAD/ATPAD Ports

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Contents 3Com Corporation Restricted Rights Notification for U.S. Government Users Restricted Rights LegendProprietary Material Page Contents Page Configuring PAD/ATPAD Ports OverviewIntroduction Before You BeginAbout Packet Assembler/Disassembler Typical Applications ExamplePAD Port PAD Port ConfigurationConfiguration Record Guidelines If You Specify or Set ThenStep Action Result Use Connection Type When ParametersConnection Type Use Connection Type Port ControlPort Speed Auto Baud SequenceCRONLY, CRDOTCR, TYMNET, Telenet CronlyData Bits per Character Device ParityNONE, SPAC, MARK, EVEN, ODD, Auto Number of Stop BitsCall Control NONE, AUTO, AUTC, PCUD, IBAR, OBAR, MNEM, TmnemCUGOA, BMSG, ADDR, FRCB, Cugia Terminal ControlNONE, PASS, LIM, CUG, LCPY, 7BIT, NADD, X.28, Cnui Autocall Timeout sec PAD Prompt Entry NumberRemote PAD Parameters Number Autocall MnemonicMaximum Number of Autocall Attempts SubaddressGroup Subaddress CUG MembershipInvitation to clear Call Accept Timeout secBilling Records Reconnection Timeout Protection LevelNONE, CPONLY, Fulldcp Reconnection Tries LimitCalling DTE Password Maximum Receive Buffer LengthCalled DTE Address Calling DTE IdentifierPAD Command Language NUI verification timerNUI Facility Format Max NUI violationsAction Type for NUI violations NONE, DISC, DEGR, LockPAD Port Configuration for Autocalling Initiating an AutoCall Mnemonic AddressingSdlc Mnemonic Addressing Sdlc Mnemonic Autocall AddressingPAD Port Configuration for Autospeed PAD XON/OFF Support Using X.25 Interrupt Packets How It WorksStep Action Before You Begin Accessing the PAD Prompt Table Record PAD Prompt Table RecordWhat You See This RecordPAD Prompt Text PAD Prompt Table Record ParametersEntry Number PAD Profile Table Record Introduction What You See In This RecordSelect PAD Profile Table from Configuration GuidelinesAccessing the PAD Profile Table Record PAD Profile Table Record Parameters #1, PAD Recall#3, Data Forwarding Character #4, Idle Timer Delay#2, Echo #6, Service Signals Control #5, Device Flow Control#10, Line Folding #7, Break Signal Operation#9, Padding After Carriage Return #12, PAD Data Restraint #13, Line Feed Insertion after CR#14, Padding after LF #15, Editing#16, Character Delete #17, Line Delete#18, Line Display #19, Editing Type#20, Echo Mask #21 Parity Treatment#22, Page Wait #100, Break Character#101, Echo Substitution Toggle Character #102, Echo Substitution Character#104, Xoff Character #105, Control Signal EIA-232-D Data Restraint#103, XON Character #108, Disconnect Character #107, Idle Disconnect Timer#106, Network Parity #110, Esc Forwarding Delay Handling #109, Form Feed Padding#113, Hewlett-Packard Flow Control #111, Echo Control#112, Dynamic Data Forwarding #115, Data Forwarding Criteria #114, PAD Mode#116, Short Timer Duration #119, DCD to Data Timer Duration #117, EIA Signalling Action#118, Message Assembly Copying PAD Profile Tables into a Configuration PAD Profile TableSize Select Copy/Insert RecordPrinter Parameter Name Default Test Simple TransparParameter Values Stored In Memory Parameter Name TPA Hpea Hpxon Host RmotTPA Hpea Hpxon Host Rmot Message Parameter INT1984 IRANSP1PAD Bulletin Remote PAD Parameter Table Record Select Remote PAD ParameterRemote PAD Parameter Table Record Parameters #1 Parameter Number #1 Parameter Value Detailed PAD Port Statistics FunctionDescription Terms First Screen Screen Term Tells YouNull Example of Detailed PAD Port Statistics, Second ScreenDescription Terms Second Screen Example of Detailed PAD Port Statistics, Third Screen Atpad Ports Atpad Operation Data Forwarding CriteriaCriteria Descriptions If you want to Then useFlow Control XON/XOFFNetwork Parity Application Response Delay DTR Timeout Atpad Application EnvironmentConfiguration Use these guidelines when you enter Atpad commandsConfigure Atpad Port Menu Port Type NULL, PAD, X25, SDLC, FRI, ATPAD, PPPPAD SIMP, DTRData Bits ParityNONE, SPAC, MARK, EVEN, ODD Stop BitsCarriage Return Character Line Feed CharacterBack Space Character Data Forwarding CharacterEscape Sequence Timer Data Forwarding TimerXON Character NONE, CNTL, XoffAnswer Mode Packet SizeEcho Stored AddressesResult Codes ALPHA, NUM, NoneAlpha Restricted Connection DestinationNONE, SPAC, MARK, Even Protocol IDNetwork Parity Atpad Port Statistics Atpad Port Statistics ScreenNull Description Terms Second Screen Technical Support Access by Analog Modem Country Data Rate Telephone NumberCountry Telephone Number Support from3Com Returning Country Telephone Number Fax NumberSymbols IndexNumerics ApadIndex-2 Sdlc URL
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S200 specifications

The 3Com S200 is a cutting-edge networking solution designed to meet the demands of small to medium-sized businesses. Renowned for its reliability and performance, this switch offers seamless integration and enhances network efficiency through advanced features and technologies.

One of the standout features of the 3Com S200 is its versatility. With a variety of ports ranging from 8 to 48, the switch provides ample connectivity options for various devices. This flexibility makes it an ideal choice for businesses aiming to expand their network without the need for extensive infrastructure changes. Built-in support for Power over Ethernet (PoE) enables users to connect and power devices such as IP phones and cameras, simplifying wiring and installation.

Performance is another key characteristic of the 3Com S200. Equipped with Layer 2 switching capabilities, the S200 allows for intelligent traffic management and efficient data handling. It supports advanced features like VLAN tagging, which facilitates network segmentation, improving security and performance. Additionally, the switch boasts a user-friendly interface that enables streamlined management, making network monitoring and configuration easily accessible even for non-technical staff.

The durability and reliability of the 3Com S200 are further enhanced by its robust design. Built to handle the rigors of a business environment, the switch features a fanless design for quiet operation, making it suitable for office use where noise may be an issue. With energy-efficient technology, the S200 not only minimizes power consumption but also contributes to cost savings over time.

Security is a priority for modern networks, and the 3Com S200 excels in this area. It offers features such as port security and access control lists to protect sensitive data and manage user access. Moreover, support for SNMP (Simple Network Management Protocol) facilitates proactive network management and monitoring, allowing businesses to address potential issues before they escalate.

In conclusion, the 3Com S200 stands out as a reliable, efficient, and secure networking solution. With its versatile port options, Layer 2 capabilities, user-friendly management interface, and robust security features, it is an excellent choice for businesses looking to enhance their network infrastructure. Whether scaling operations or optimizing current performance, the 3Com S200 provides the technology and reliability needed to thrive in today’s digital landscape.
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