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- Rules of Thumb
- NetWare Asynchronous Communications Services v3.0 (NACS)
- February 16, 1993
-
- By allowing users to share communications resources connected to a NetWare
- server, NACS provides asynchronous connectivity to multiple users on a
- NetWare LAN. To aid you in configuring NACS for optimal performance,
- reliability, and ease of use, we asked our engineers what components they
- would use if they were installing NACS. Here's what they said.
-
- Possible Applications of NACS
- -----------------------------
- LAN users can share asynchronous communications resources attached to the
- NACS; such as modem connections, muxes, and direct asynchronous host lines,
- thereby eliminating the need for separate modems or direct connections from
- individual workstations.
-
- Depending on the capabilities of the communications adapters installed in
- NACS, users can transmit data at up to 115.2 Kbps. NACS works in
- conjunction with NASI (NetWare Asynchronous Services Interface), to support
- most common communications packages and terminal emulators. For a list of
- known NASI compatible applications, refer to "NASI Compatible Applications"
- below.
-
- Supported NetWare Environments
- ------------------------------
- NACS is compatible with any version of NetWare. However, it must run on a
- NetWare 3.11 server. This can be a NetWare 3.11 file server or a RunTime
- 3.11 server on a LAN with file servers running other versions of NetWare
-
- Runtime v3.11 is a special version of the Netware operating system which
- can be used to run NLMs (NetWare Loadable Modules) like NACS 3 but which
- can not be used for a file server. NetWare Runtime v3.11 is provided with
- the 8 port, 16 port and 32 port versions of NACS.
-
- Even if you have a 3.11 file server, if you anticipate heavy activity on
- the file server, you may wish to reduce processing overhead by running NACS
- on a Runtime NetWare Server.
-
- NACS and the NetWare Communication Services
- --------------------------------------------
- NACS is one of Novell's NetWare Communication Services, a family of
- products that provide an integrated solution to LAN communication
- requirements. To run the NACS, first start the Communication Executive
- (the control program for the NetWare Communication Services) and then
- launch the NACS software.
-
- NACS Product Versions
- ---------------------
- NACS v3.0 comes in four versions:
- 2 port
- 8 port
- 16 port
- 32 port
-
- All 4 versions must run on either a NetWare v3.11 file server or a NetWare
- Runtime v3.11 server (Runtime supplied with all versions except 2 port).
-
- 2 port NACS
- -----------
- Supports up to two active NASI connections per NACS. You can use standard
- serial ports installed in the server and/or you can use ports provided by
- various communications adapters*.
-
- 8 port NACS
- -----------
- Allows up to eight active NASI connections per NACS. You can use ports
- provided by various communications adapters* and/or up to 5 standard serial
- ports installed in the server.
-
- 16 port NACS
- ------------
- Allows up to eight active NASI connections per NACS. You can use ports
- provided by various communications adapters* and/or up to 5 standard serial
- ports installed in the server.
-
- The 32 port NACS
- ----------------
- Allows up to 32 active connections per NACS. You can use ports provided by
- various communications adapters* and/or up to 5 standard serial ports
- installed in the server.
-
- * We recommend the use of a communications adapter. Tested communications
- adapters and adapter drivers certified for NACS are listed later in this
- document.
-
- New Features
- ------------
- NACS v3.0 has several new features:
- - Dynamic reconfiguration
- - Higher data rate support
- - Hardware independence
- - Local and remote management capabilities
- - Security management
- - Diagnostic tools
-
- Dynamic Reconfiguration
- -----------------------
- NACS now runs as a NetWare Loadable Module (NLM), which allows greater
- flexibility in running and configuring the NACS. NACS v3.0 includes a
- series of asynchronous I/O drivers that also run as NLMs. Because these
- modules can be loaded and unloaded without bringing down the NetWare
- server, it is easy to reconfigure the NACS when you change the hardware
- configuration on the server.
-
- Higher Data Rate Support
- ------------------------
- NACS v3.0 supports higher data rates than previous versions of NACS. NACS
- v3.0 can transmit data at up to 115.2 Kbps per port, depending on the
- ability of the communications adapter used with the NACS.
-
- Hardware Independence
- ---------------------
- The architecture of the new NACS software allows the use of a variety
- of third party communications adapters.
-
- Local and Remote Management Capabilities
- ----------------------------------------
- NACS v3.0 includes a NACS console that lets you configure the NACS and
- monitor activity on the NACS as a whole or on individual ports. The NACS
- console also lets you view a log file that summarizes activity on the NACS.
- You can run the NACS console locally on the NetWare server or remotely
- using Novell's RCONSOLE utility on a workstation connected to the LAN.
-
- Security Management
- -------------------
- NACS v3.0 has improved security management features. Using the NetWare
- system configuration utility (SYSCON) you can restrict access to an
- individual NACS, to individual ports on a NACS, or to members of authorized
- user groups. Access to the NACS console can be restricted to users with a
- specified password.
-
- Diagnostic Tools
- ----------------
- NACS v3.0 includes new diagnostic utilities that let you test the operation
- of the NACS and the operation of individual ports on the NACS. The NACS
- availability test lets you test the availability of a particular NACS. The
- NACS performance test lets you test the performance of a specific port on
- the NACS. The NACS loopback test lets you test the connection for each
- port. NACS also lets you maintain a trace file that shows data written
- from and read to specific ports.
-
- Hardware and Software Requirements
- ----------------------------------
- NACS requires the following hardware and software.
-
- NetWare Server Hardware
- -----------------------
- A NetWare server requires the following hardware to run NACS:
-
- A 386 or 486 PC with appropriate disk and memory requirements as
- described in "NetWare Server Memory Requirements" and in "Disk space
- Requirements".
-
- An appropriate LAN adapter. All certified NetWare v3.11 LAN adapters are
- supported.
-
- At least one standard serial port or one or more of the communications
- adapters listed under "Communications Adapters".
-
- Appropriate asynchronous communications hardware, such as modems,
- multiplexers, or direct connections to asynchronous hosts.
-
- NetWare Server Memory Requirements
- ----------------------------------
- Use this procedure to determine the total amount of memory required for a
- NetWare server running NACS.
-
- If you are using NetWare Runtime v3.11 the minimum recommended system
- memory is 6 MB. If you are using NetWare v3.11 in an integrated
- configuration, use the following steps to determine the memory
- requirements for running NACS.
- 1. Calculate the memory requirement for each volume.
- For each DOS volume:
- M = .023 X VOLUME SIZE (in MB) / BLOCK SIZE (default is 4)
- For each volume with added Name Space:
- M = .032 X VOLUME SIZE (in MB) / BLOCK SIZE (default is 4)
- 2. Add memory requirements for all volumes:
- TOTAL VOLUME MEMORY = Msys: + Mvol1: + Mvol2:
-
- 3. Add 2 MB for the operating system and round the value to the next
- higher integer. If the total is under 3 MB, use 4 MB for your NetWare
- v3.11 memory requirement.
-
- 4. Regardless of the number of ports you will run on the NACS, add 2 MB
- to the value determined in Step 3 (to run NACS).
-
- 5. If you are running both NACS and Netware for SAA, add the amount of
- memory required for the number of NetWare for SAA sessions to the value
- determined in Step 4.
-
- The following table shows typical memory requirements for the NACS with
- various server configurations.
-
- Memory Requirements for NACS
- ----------------------------
- Runtime Server Running NACS* 6MB
- Runtime Server Running NACS and NetWare for SAA with 64 Sessions* 8MB
- Standard NetWare Server Running NACS* 6MB
- Standard NetWare Server with 1 GigaB of Volume Space Running NACS* 8MB
- * 2 port, 8 port, 16 port, or 32 port versions
-
- Increasing Memory
- -----------------
- NACS should run without any problems using the memory calculated using the
- procedure outlined above. If you get messages indicating memory problems,
- add additional memory to the server in 1MB increments.
-
- Disk Space Requirements
- -----------------------
- The NACS software requires 3 MB of system volume space in addition to the
- space required by NetWare v3.11 or NetWare Runtime v3.11.
-
- Netware Server Software
- -----------------------
- A NetWare server requires the following software to run NACS:
- NetWare v3.11 or NetWare Runtime v3.11
-
- Workstation Hardware
- --------------------
- A workstation running NASI requires the same hardware as a regular NetWare
- workstation.
-
- Workstation Memory Requirements
- -------------------------------
- A workstation running NASI and a NASI application requires the following
- memory.
-
- 1. From 34 to 66 KB of memory to run NASI, depending on the number of
- sessions a workstation will use. (If enough high memory is available, NASI
- can be loaded into "high" memory, the 384KB of address space above the
- 640KB reserved for DOS, using a DOS extender.
-
- 2. An average of 512 KB of memory to run application programs and NetWare
- menu utilities. Some NASI applications may require additional memory on
- the workstation. Consult the publisher's documentation for additional
- information.
-
- Workstation Software
- --------------------
- A workstation requires the following software to run NASI and NASI
- applications. DOS v3.x, 4.x, or 5.x (IBM DOS or MS-DOS) or DR DOS v6.0
-
- NACS Hardware Recommendations
- -----------------------------
- Server Hardware
- ---------------
- NACS should operate on any NetWare v3.11 server tested and approved by
- Novell Labs through Novell's Independent Manufacturer's Support Program
- (IMSP). For more information on Pcs that are suitable for use as
- NetWare servers, contact your authorized NetWare reseller.
-
- LAN Adapters
- ------------
- NACS is designed to work with any LAN adapter that has been tested and
- approved by Novell Labs through Novell's IMSP.
-
- Communications Adapters
- -----------------------
- Although you can use the COM ports installed in the NACS (up to two
- standard serial ports with the 2 port NACS, and up to five standard
- serial ports with the 8 port, 16 and 32 port NACS) for asynchronous data
- communications, even at 2400bps, data loss can occur (unless a 16550 UART
- and AIOCOMX v2 is used). For better performance, we recommend using one
- of the following extended serial port adapters that provide flow control
- capabilities.
-
- Third party board (driver supplied with NACS)
- >> The WNIM+ (Wide Area Network Interface Plus Adapter) available from:
- Microdyne Corporation
- (800) 255-3967
- An ISA (Industry Standard Architecture) bus adapter that provides four
- asynchronous ports that can run at up to 38.4 Kbps. An asynchronous I/O
- driver for the WNIM+ adapter is provided with the NACS software.
-
- Third party boards and third party drivers for the following have been
- certified for NACS:
-
- >> Digiboard 612-943-9020
- DigiBoard CX system for AIO (ISA), 16 ports per concentrator (chains up
- to 128)
- DigiBoard MC/8i for AIO (MCA), 8 port driver
- DigiBoard PC/8e for AIO (ISA), 8 port driver
-
- >> Hayes 404-441-1617
- Hayes ESP (ISA) 2 port board
- The Hayes board MUST have firmware revision 7.0 (upgrade available from
- Hayes).
-
- Using DMA Enhanced mode (the preferred setting for the adapters) you can
- run both ports on the adapters simultaneously at up to 38.4 Kbps or a
- single port at up to 57.6 Kbps.
-
- >> Newport Systems Solutions 714-752-1511
- Newport ACI (ISA)
- Can run at up to 38.4 Kbps.
-
- >> Star Gate Technologies 800-782-7428
- Star Gate One Slot [with AIOCOMX V2 only]
- 4 serial ports
-
- Modems
- ------
- NACS v3.0 will work with modems that are supported by your NASI compatible
- communications applications.
-
- Compatible Communications Programs
- ----------------------------------
- As shown below many communications programs are compatible with NACS for
- calling out purposes.
- However, only three products are known to be able to call into a NACS and
- take over a
- workstation on the LAN:
- 1. PCAnywhere (Including AnywhereIV LAN) from Symantech, is NACS/NASI
- compatible for calling BOTH in AND out.
- 2. CoSession LAN version.
- 3. Citrix A+ Remote
- The following are either known to be or are claimed by their publishers to
- be NACS/NASI compatible:
-
- Product Version Telephone #
- ASCOM IV Network 1.42 No Longer Sold
- BLAST Professional DOS 10.5 800-242-5278
- BLAST Professional Server 10.5 " " "
- CIM 2.1 Compuserve
- Citrix A+ Remote All 305-755-0559
- Co/Session LAN II 908-855-9440
- Crosstalk Mark 4 1.1 and later 800-348-3221
- Crosstalk for Windows (W) 1.2 " " "
- Crosstalk 16 Network V3.71 " " "
- DynaComm Asynch (W) V3.00.28 713-496-9400
- EM220 V4.0 and later 303-447-9251
- EM320 All " " "
- EM4010 All " " "
- EM4105 All " " "
- KEAterm (W) **** All 800-663-8702
- LEXUS 2000 LAN 2.5 800-227-9597
- Minisoft 92 * All 800-682-0200
- Minisoft 92 for Windows * All 800-682-0200
- Mirror III LAN All "LAN" 800-634-8670
- OnLAN 1.2 & 1.3 800-NETWARE
- PCanywhere IV LAN 4.5 800-441-7234
- PCTerm All 206-487-3656
- PolyCom All 314-432-4142
- PolyStar/T 2.31 " " "
- PolyNet (O) All " " "
- Procom+ Network 800-533-4190
- Reflection ** All but Mac V 800-872-2829
- Relay Gold LAN 3.0 & later 800-822-8224
- Smartcom Exe 2.1 404-441-1617
- Smartcom III 2.0 " " "
- SmartTerm 240 3.0 & later 800-368-5283
- SmartTerm 320 All " " "
- SmartTerm 340 All " " "
- SmartTerm 470 All " " "
- Softerm PC 2.0 & later 800-225-8590
- Softerm Modular All " " "
- VsCom/LAN *** 7.6 312-443-1222
- Westlaw/Westmate 2.2 800-937-8529
- Zstem 340, LAN, VT 340/320 1.0.3 800-663-8702
-
- Earlier and/or later versions may also be compatible.
-
- (W) Windows application
- (O) ODI
- * HP2392A Terminal Emulator
- ** Compatible with NASI2x but problems are known to exist relative to
- NASI3x.
- *** Does not claim to be compatible with NASI3.
- **** VT420 emulation
-
- There are other communications programs that work with NACS and NASI. If
- you wish to use a communications program that is not listed above, and
- intend to use it with NASI, contact the publisher of the communications
- program. Most NASI compatible applications are compatible with both
- NACS/NASI v3.x and with v2.x
-
- For information on becoming a NASI developer and a copy of the NASI
- Programmers Guide, call 800-REDWORD.
-
- Performance Factors
- -------------------
- NACS should run satisfactorily on any of the server platforms listed under
- "Server Hardware" with sufficient RAM installed in the server. Running in
- our test labs, the 32 port version of the NACS product has performed well,
- running on the standard Netware platform with file and print services.
-
- If you are running file and print services on the standard NetWare server
- and you have, for example, 250 simultaneous users, or you have other CPU
- intensive applications installed on the NetWare server, we recommend
- running the NACS on a separate RunTime v3.11 server.
-
- Data Transmission Speed
- -----------------------
- Each NACS port can transmit data at speeds from 50bps to 115.2Kbps.
- However, the actual speed available depends on the communications
- adapter(s) and driver intstalled in the NACS. When you configure the NACS
- ports, the NACS console displays only parameter choices supported by the
- driver that controls the port that you are configuring.
- - data rates
- - parity checking
- - stop bits
- - data character size
- Refer to the communications adapter vendor's documentation for information
- on the settings supported by your driver.
-
- Running NACS v3.0 with NACS v2.x
- --------------------------------
- You can run NACS v3.0 and NACS V2.x on the same LAN.
- However, a workstation can run only NASI (v2.xx) or NASI3 (the NACS v3.0
- version of NASI). That is, not both at once.
-
- A workstation running NASI v2.x can not access a NACS v3.0 server
- A workstation running NASI3 can not access a NACS v2.x server.