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1 Welcome to Beta Release 2 of the combination ISDN driver for SpellCaster's
2 ISA ISDN adapters. Please note this release 2 includes support for the
3 DataCommute/BRI and TeleCommute/BRI adapters only and any other use is
4 guaranteed to fail. If you have a DataCommute/PRI installed in the test
5 computer, we recommend removing it as it will be detected but will not
6 be usable. To see what we have done to Beta Release 2, see section 3.
7
8 Speaking of guarantees, THIS IS BETA SOFTWARE and as such contains
9 bugs and defects either known or unknown. Use this software at your own
10 risk. There is NO SUPPORT for this software. Some help may be available
11 through the web site or the mailing list but such support is totally at
12 our own option and without warranty. If you choose to assume all and
13 total risk by using this driver, we encourage you to join the beta
14 mailing list.
15
16 To join the Linux beta mailing list, send a message to:
17 majordomo@spellcast.com with the words "subscribe linux-beta" as the only
18 contents of the message. Do not include a signature. If you choose to
19 remove yourself from this list at a later date, send another message to
20 the same address with the words "unsubscribe linux-beta" as its only
21 contents.
22
23 TABLE OF CONTENTS
24 -----------------
25 1. Introduction
26 1.1 What is ISDN4Linux?
27 1.2 What is different between this driver and previous drivers?
28 1.3 How do I setup my system with the correct software to use
29 this driver release?
30
31 2. Basic Operations
32 2.1 Unpacking and installing the driver
33 2.2 Read the man pages!!!
34 2.3 Installing the driver
35 2.4 Removing the driver
36 2.5 What to do if it doesn't load
37 2.6 How to setup ISDN4Linux with the driver
38
39 3. Beta Change Summaries and Miscellaneous Notes
40
41 1. Introduction
42 ---------------
43
44 The revision 2 Linux driver for SpellCaster ISA ISDN adapters is built
45 upon ISDN4Linux available separately or as included in Linux 2.0 and later.
46 The driver will support a maximum of 4 adapters in any one system of any
47 type including DataCommute/BRI, DataCommute/PRI and TeleCommute/BRI for a
48 maximum of 92 channels for host. The driver is supplied as a module in
49 source form and needs to be complied before it can be used. It has been
50 tested on Linux 2.0.20.
51
52 1.1 What Is ISDN4Linux
53
54 ISDN4Linux is a driver and set of tools used to access and use ISDN devices
55 on a Linux platform in a common and standard way. It supports HDLC and PPP
56 protocols and offers channel bundling and MLPPP support. To use ISDN4Linux
57 you need to configure your kernel for ISDN support and get the ISDN4Linux
58 tool kit from our web site.
59
60 ISDN4Linux creates a channel pool from all of the available ISDN channels
61 and therefore can function across adapters. When an ISDN4Linux compliant
62 driver (such as ours) is loaded, all of the channels go into a pool and
63 are used on a first-come first-served basis. In addition, individual
64 channels can be specifically bound to particular interfaces.
65
66 1.2 What is different between this driver and previous drivers?
67
68 The revision 2 driver besides adopting the ISDN4Linux architecture has many
69 subtle and not so subtle functional differences from previous releases. These
70 include:
71 - More efficient shared memory management combined with a simpler
72 configuration. All adapters now use only 16Kbytes of shared RAM
73 versus between 16K and 64K. New methods for using the shared RAM
74 allow us to utilize all of the available RAM on the adapter through
75 only one 16K page.
76 - Better detection of available upper memory. The probing routines
77 have been improved to better detect available shared RAM pages and
78 used pages are now locked.
79 - Decreased loading time and a wider range of I/O ports probed.
80 We have significantly reduced the amount of time it takes to load
81 the driver and at the same time doubled the number of I/O ports
82 probed increasing the likelihood of finding an adapter.
83 - We now support all ISA adapter models with a single driver instead
84 of separate drivers for each model. The revision 2 driver supports
85 the DataCommute/BRI, DataCommute/PRI and TeleCommute/BRI in any
86 combination up to a maximum of four adapters per system.
87 - On board PPP protocol support has been removed in favour of the
88 sync-PPP support used in ISDN4Linux. This means more control of
89 the protocol parameters, faster negotiation time and a more
90 familiar interface.
91
92 1.3 How do I setup my system with the correct software to use
93 this driver release?
94
95 Before you can compile, install and use the SpellCaster ISA ISDN driver, you
96 must ensure that the following software is installed, configured and running:
97
98 - Linux kernel 2.0.20 or later with the required init and ps
99 versions. Please see your distribution vendor for the correct
100 utility packages. The latest kernel is available from
101 ftp://sunsite.unc.edu/pub/Linux/kernel/v2.0/
102
103 - The latest modules package (modules-2.0.0.tar.gz) from
104 ftp://sunsite.unc.edu/pub/Linux/kernel/modules-2.0.0.tar.gz
105
106 - The ISDN4Linux tools available from
107 ftp://ftp.franken.de/pub/isdn4linux/v2.0/isdn4k-utils-2.0.tar.gz
108 This package may fail to compile for you so you can alternatively
109 get a pre-compiled version from
110 ftp://ftp.spellcast.com/pub/drivers/isdn4linux/isdn4k-bin-2.0.tar.gz
111
112
113 2. Basic Operations
114 -------------------
115
116 2.1 Unpacking and installing the driver
117
118 1. As root, create a directory in a convenient place. We suggest
119 /usr/src/spellcaster.
120
121 2. Unpack the archive with :
122 tar xzf sc-n.nn.tar.gz -C /usr/src/spellcaster
123
124 3. Change directory to /usr/src/spellcaster
125
126 4. Read the README and RELNOTES files.
127
128 5. Run 'make' and if all goes well, run 'make install'.
129
130 2.2 Read the man pages!!!
131
132 Make sure you read the scctrl(8) and sc(4) manual pages before continuing
133 any further. Type 'man 8 scctrl' and 'man 4 sc'.
134
135 2.3 Installing the driver
136
137 To install the driver, type '/sbin/insmod sc' as root. sc(4) details options
138 you can specify but you shouldn't need to use any unless this doesn't work.
139
140 Make sure the driver loaded and detected all of the adapters by typing
141 'dmesg'.
142
143 The driver can be configured so that it is loaded upon startup. To do this,
144 edit the file "/etc/modules/'uname -f'/'uname -v'" and insert the driver name
145 "sc" into this file.
146
147 2.4 Removing the driver
148
149 To remove the driver, delete any interfaces that may exist (see isdnctrl(8)
150 for more on this) and then type '/sbin/rmmod sc'.
151
152 2.5 What to do if it doesn't load
153
154 If, when you try to install the driver, you get a message mentioning
155 'register_isdn' then you do not have the ISDN4Linux system installed. Please
156 make sure that ISDN support is configured in the kernel.
157
158 If you get a message that says 'initialization of sc failed', then the
159 driver failed to detect an adapter or failed to find resources needed such
160 as a free IRQ line or shared memory segment. If you are sure there are free
161 resources available, use the insmod options detailed in sc(4) to override
162 the probing function.
163
164 Upon testing, the following problem was noted, the driver would load without
165 problems, but the board would not respond beyond that point. When a check was
166 done with 'cat /proc/interrupts' the interrupt count for sc was 0. In the event
167 of this problem, change the BIOS settings so that the interrupts in question are
168 reserved for ISA use only.
169
170
171 2.6 How to setup ISDN4Linux with the driver
172
173 There are three main configurations which you can use with the driver:
174
175 A) Basic HDLC connection
176 B) PPP connection
177 C) MLPPP connection
178
179 It should be mentioned here that you may also use a tty connection if you
180 desire. The Documentation directory of the isdn4linux subsystem offers good
181 documentation on this feature.
182
183 A) 10 steps to the establishment of a basic HDLC connection
184 -----------------------------------------------------------
185
186 - please open the isdn-hdlc file in the examples directory and follow along...
187
188 This file is a script used to configure a BRI ISDN TA to establish a
189 basic HDLC connection between its two channels. Two network
190 interfaces are created and two routes added between the channels.
191
192 i) using the isdnctrl utility, add an interface with "addif" and
193 name it "isdn0"
194 ii) add the outgoing and inbound telephone numbers
195 iii) set the Layer 2 protocol to hdlc
196 iv) set the eaz of the interface to be the phone number of that
197 specific channel
198 v) to turn the callback features off, set the callback to "off" and
199 the callback delay (cbdelay) to 0.
200 vi) the hangup timeout can be set to a specified number of seconds
201 vii) the hangup upon incoming call can be set on or off
202 viii) use the ifconfig command to bring up the network interface with
203 a specific IP address and point to point address
204 ix) add a route to the IP address through the isdn0 interface
205 x) a ping should result in the establishment of the connection
206
207
208 B) Establishment of a PPP connection
209 ------------------------------------
210
211 - please open the isdn-ppp file in the examples directory and follow along...
212
213 This file is a script used to configure a BRI ISDN TA to establish a
214 PPP connection between the two channels. The file is almost
215 identical to the HDLC connection example except that the packet
216 encapsulation type has to be set.
217
218 use the same procedure as in the HDLC connection from steps i) to
219 iii) then, after the Layer 2 protocol is set, set the encapsulation
220 "encap" to syncppp. With this done, the rest of the steps, iv) to x)
221 can be followed from above.
222
223 Then, the ipppd (ippp daemon) must be setup:
224
225 xi) use the ipppd function found in /sbin/ipppd to set the following:
226 xii) take out (minus) VJ compression and bsd compression
227 xiii) set the mru size to 2000
228 xiv) link the two /dev interfaces to the daemon
229
230 NOTE: A "*" in the inbound telephone number specifies that a call can be
231 accepted on any number.
232
233 C) Establishment of a MLPPP connection
234 --------------------------------------
235
236 - please open the isdn-mppp file in the examples directory and follow along...
237
238 This file is a script used to configure a BRI ISDN TA to accept a
239 Multi Link PPP connection.
240
241 i) using the isdnctrl utility, add an interface with "addif" and
242 name it "ippp0"
243 ii) add the inbound telephone number
244 iii) set the Layer 2 protocol to hdlc and the Layer 3 protocol to
245 trans (transparent)
246 iv) set the packet encapsulation to syncppp
247 v) set the eaz of the interface to be the phone number of that
248 specific channel
249 vi) to turn the callback features off, set the callback to "off" and
250 the callback delay (cbdelay) to 0.
251 vi) the hangup timeout can be set to a specified number of seconds
252 vii) the hangup upon incoming call can be set on or off
253 viii) add a slave interface and name it "ippp32" for example
254 ix) set the similar parameters for the ippp32 interface
255 x) use the ifconfig command to bring-up the ippp0 interface with a
256 specific IP address and point to point address
257 xi) add a route to the IP address through the ippp0 interface
258 xii) use the ipppd function found in /sbin/ipppd to set the following:
259 xiii) take out (minus) bsd compression
260 xiv) set the mru size to 2000
261 xv) add (+) the multi-link function "+mp"
262 xvi) link the two /dev interfaces to the daemon
263
264 NOTE: To use the MLPPP connection to dial OUT to a MLPPP connection, change
265 the inbound telephone numbers to the outgoing telephone numbers of the MLPPP
266 host.
267
268
269 3. Beta Change Summaries and Miscellaneous Notes
270 ------------------------------------------------
271 When using the "scctrl" utility to upload firmware revisions on the board,
272 please note that the byte count displayed at the end of the operation may be
273 different from the total number of bytes in the "dcbfwn.nn.sr" file. Please
274 disregard the displayed byte count.
275
276 It was noted that in Beta Release 1, the module would fail to load and result
277 in a segmentation fault when 'insmod'ed. This problem was created when one of
278 the isdn4linux parameters, (isdn_ctrl, data field) was filled in. In some
279 cases, this data field was NULL, and was left unchecked, so when it was
280 referenced... segv. The bug has been fixed around line 63-68 of event.c.
281