282 lines
12 KiB
Python
282 lines
12 KiB
Python
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Welcome to Beta Release 2 of the combination ISDN driver for SpellCaster's
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ISA ISDN adapters. Please note this release 2 includes support for the
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DataCommute/BRI and TeleCommute/BRI adapters only and any other use is
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guaranteed to fail. If you have a DataCommute/PRI installed in the test
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computer, we recommend removing it as it will be detected but will not
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be usable. To see what we have done to Beta Release 2, see section 3.
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Speaking of guarantees, THIS IS BETA SOFTWARE and as such contains
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bugs and defects either known or unknown. Use this software at your own
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risk. There is NO SUPPORT for this software. Some help may be available
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through the web site or the mailing list but such support is totally at
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our own option and without warranty. If you choose to assume all and
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total risk by using this driver, we encourage you to join the beta
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mailing list.
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To join the Linux beta mailing list, send a message to:
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majordomo@spellcast.com with the words "subscribe linux-beta" as the only
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contents of the message. Do not include a signature. If you choose to
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remove yourself from this list at a later date, send another message to
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the same address with the words "unsubscribe linux-beta" as its only
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contents.
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TABLE OF CONTENTS
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-----------------
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1. Introduction
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1.1 What is ISDN4Linux?
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1.2 What is different between this driver and previous drivers?
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1.3 How do I setup my system with the correct software to use
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this driver release?
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2. Basic Operations
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2.1 Unpacking and installing the driver
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2.2 Read the man pages!!!
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2.3 Installing the driver
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2.4 Removing the driver
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2.5 What to do if it doesn't load
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2.6 How to setup ISDN4Linux with the driver
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3. Beta Change Summaries and Miscellaneous Notes
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1. Introduction
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---------------
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The revision 2 Linux driver for SpellCaster ISA ISDN adapters is built
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upon ISDN4Linux available separately or as included in Linux 2.0 and later.
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The driver will support a maximum of 4 adapters in any one system of any
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type including DataCommute/BRI, DataCommute/PRI and TeleCommute/BRI for a
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maximum of 92 channels for host. The driver is supplied as a module in
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source form and needs to be complied before it can be used. It has been
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tested on Linux 2.0.20.
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1.1 What Is ISDN4Linux
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ISDN4Linux is a driver and set of tools used to access and use ISDN devices
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on a Linux platform in a common and standard way. It supports HDLC and PPP
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protocols and offers channel bundling and MLPPP support. To use ISDN4Linux
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you need to configure your kernel for ISDN support and get the ISDN4Linux
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tool kit from our web site.
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ISDN4Linux creates a channel pool from all of the available ISDN channels
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and therefore can function across adapters. When an ISDN4Linux compliant
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driver (such as ours) is loaded, all of the channels go into a pool and
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are used on a first-come first-served basis. In addition, individual
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channels can be specifically bound to particular interfaces.
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1.2 What is different between this driver and previous drivers?
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The revision 2 driver besides adopting the ISDN4Linux architecture has many
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subtle and not so subtle functional differences from previous releases. These
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include:
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- More efficient shared memory management combined with a simpler
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configuration. All adapters now use only 16Kbytes of shared RAM
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versus between 16K and 64K. New methods for using the shared RAM
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allow us to utilize all of the available RAM on the adapter through
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only one 16K page.
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- Better detection of available upper memory. The probing routines
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have been improved to better detect available shared RAM pages and
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used pages are now locked.
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- Decreased loading time and a wider range of I/O ports probed.
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We have significantly reduced the amount of time it takes to load
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the driver and at the same time doubled the number of I/O ports
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probed increasing the likelihood of finding an adapter.
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- We now support all ISA adapter models with a single driver instead
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of separate drivers for each model. The revision 2 driver supports
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the DataCommute/BRI, DataCommute/PRI and TeleCommute/BRI in any
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combination up to a maximum of four adapters per system.
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- On board PPP protocol support has been removed in favour of the
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sync-PPP support used in ISDN4Linux. This means more control of
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the protocol parameters, faster negotiation time and a more
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familiar interface.
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1.3 How do I setup my system with the correct software to use
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this driver release?
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Before you can compile, install and use the SpellCaster ISA ISDN driver, you
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must ensure that the following software is installed, configured and running:
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- Linux kernel 2.0.20 or later with the required init and ps
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versions. Please see your distribution vendor for the correct
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utility packages. The latest kernel is available from
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ftp://sunsite.unc.edu/pub/Linux/kernel/v2.0/
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- The latest modules package (modules-2.0.0.tar.gz) from
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ftp://sunsite.unc.edu/pub/Linux/kernel/modules-2.0.0.tar.gz
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- The ISDN4Linux tools available from
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ftp://ftp.franken.de/pub/isdn4linux/v2.0/isdn4k-utils-2.0.tar.gz
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This package may fail to compile for you so you can alternatively
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get a pre-compiled version from
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ftp://ftp.spellcast.com/pub/drivers/isdn4linux/isdn4k-bin-2.0.tar.gz
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2. Basic Operations
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-------------------
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2.1 Unpacking and installing the driver
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1. As root, create a directory in a convenient place. We suggest
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/usr/src/spellcaster.
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2. Unpack the archive with :
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tar xzf sc-n.nn.tar.gz -C /usr/src/spellcaster
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3. Change directory to /usr/src/spellcaster
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4. Read the README and RELNOTES files.
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5. Run 'make' and if all goes well, run 'make install'.
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2.2 Read the man pages!!!
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Make sure you read the scctrl(8) and sc(4) manual pages before continuing
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any further. Type 'man 8 scctrl' and 'man 4 sc'.
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2.3 Installing the driver
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To install the driver, type '/sbin/insmod sc' as root. sc(4) details options
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you can specify but you shouldn't need to use any unless this doesn't work.
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Make sure the driver loaded and detected all of the adapters by typing
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'dmesg'.
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The driver can be configured so that it is loaded upon startup. To do this,
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edit the file "/etc/modules/'uname -f'/'uname -v'" and insert the driver name
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"sc" into this file.
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2.4 Removing the driver
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To remove the driver, delete any interfaces that may exist (see isdnctrl(8)
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for more on this) and then type '/sbin/rmmod sc'.
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2.5 What to do if it doesn't load
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If, when you try to install the driver, you get a message mentioning
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'register_isdn' then you do not have the ISDN4Linux system installed. Please
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make sure that ISDN support is configured in the kernel.
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If you get a message that says 'initialization of sc failed', then the
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driver failed to detect an adapter or failed to find resources needed such
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as a free IRQ line or shared memory segment. If you are sure there are free
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resources available, use the insmod options detailed in sc(4) to override
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the probing function.
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Upon testing, the following problem was noted, the driver would load without
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problems, but the board would not respond beyond that point. When a check was
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done with 'cat /proc/interrupts' the interrupt count for sc was 0. In the event
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of this problem, change the BIOS settings so that the interrupts in question are
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reserved for ISA use only.
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2.6 How to setup ISDN4Linux with the driver
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There are three main configurations which you can use with the driver:
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A) Basic HDLC connection
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B) PPP connection
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C) MLPPP connection
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It should be mentioned here that you may also use a tty connection if you
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desire. The Documentation directory of the isdn4linux subsystem offers good
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documentation on this feature.
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A) 10 steps to the establishment of a basic HDLC connection
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-----------------------------------------------------------
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- please open the isdn-hdlc file in the examples directory and follow along...
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This file is a script used to configure a BRI ISDN TA to establish a
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basic HDLC connection between its two channels. Two network
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interfaces are created and two routes added between the channels.
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i) using the isdnctrl utility, add an interface with "addif" and
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name it "isdn0"
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ii) add the outgoing and inbound telephone numbers
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iii) set the Layer 2 protocol to hdlc
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iv) set the eaz of the interface to be the phone number of that
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specific channel
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v) to turn the callback features off, set the callback to "off" and
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the callback delay (cbdelay) to 0.
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vi) the hangup timeout can be set to a specified number of seconds
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vii) the hangup upon incoming call can be set on or off
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viii) use the ifconfig command to bring up the network interface with
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a specific IP address and point to point address
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ix) add a route to the IP address through the isdn0 interface
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x) a ping should result in the establishment of the connection
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B) Establishment of a PPP connection
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------------------------------------
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- please open the isdn-ppp file in the examples directory and follow along...
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This file is a script used to configure a BRI ISDN TA to establish a
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PPP connection between the two channels. The file is almost
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identical to the HDLC connection example except that the packet
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encapsulation type has to be set.
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use the same procedure as in the HDLC connection from steps i) to
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iii) then, after the Layer 2 protocol is set, set the encapsulation
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"encap" to syncppp. With this done, the rest of the steps, iv) to x)
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can be followed from above.
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Then, the ipppd (ippp daemon) must be setup:
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xi) use the ipppd function found in /sbin/ipppd to set the following:
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xii) take out (minus) VJ compression and bsd compression
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xiii) set the mru size to 2000
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xiv) link the two /dev interfaces to the daemon
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NOTE: A "*" in the inbound telephone number specifies that a call can be
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accepted on any number.
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C) Establishment of a MLPPP connection
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--------------------------------------
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- please open the isdn-mppp file in the examples directory and follow along...
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This file is a script used to configure a BRI ISDN TA to accept a
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Multi Link PPP connection.
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i) using the isdnctrl utility, add an interface with "addif" and
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name it "ippp0"
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ii) add the inbound telephone number
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iii) set the Layer 2 protocol to hdlc and the Layer 3 protocol to
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trans (transparent)
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iv) set the packet encapsulation to syncppp
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v) set the eaz of the interface to be the phone number of that
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specific channel
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vi) to turn the callback features off, set the callback to "off" and
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the callback delay (cbdelay) to 0.
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vi) the hangup timeout can be set to a specified number of seconds
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vii) the hangup upon incoming call can be set on or off
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viii) add a slave interface and name it "ippp32" for example
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ix) set the similar parameters for the ippp32 interface
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x) use the ifconfig command to bring-up the ippp0 interface with a
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specific IP address and point to point address
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xi) add a route to the IP address through the ippp0 interface
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xii) use the ipppd function found in /sbin/ipppd to set the following:
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xiii) take out (minus) bsd compression
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xiv) set the mru size to 2000
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xv) add (+) the multi-link function "+mp"
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xvi) link the two /dev interfaces to the daemon
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NOTE: To use the MLPPP connection to dial OUT to a MLPPP connection, change
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the inbound telephone numbers to the outgoing telephone numbers of the MLPPP
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host.
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3. Beta Change Summaries and Miscellaneous Notes
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------------------------------------------------
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When using the "scctrl" utility to upload firmware revisions on the board,
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please note that the byte count displayed at the end of the operation may be
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different from the total number of bytes in the "dcbfwn.nn.sr" file. Please
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disregard the displayed byte count.
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It was noted that in Beta Release 1, the module would fail to load and result
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in a segmentation fault when 'insmod'ed. This problem was created when one of
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the isdn4linux parameters, (isdn_ctrl, data field) was filled in. In some
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cases, this data field was NULL, and was left unchecked, so when it was
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referenced... segv. The bug has been fixed around line 63-68 of event.c.
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