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2
3First:
4
5    HiSax is free software; you can redistribute it and/or modify
6    it under the terms of the GNU General Public License as published by
7    the Free Software Foundation; either version 2 of the License, or
8    (at your option) any later version.
9
10    This program is distributed in the hope that it will be useful,
11    but WITHOUT ANY WARRANTY; without even the implied warranty of
12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
13    GNU General Public License for more details.
14
15However, if you wish to modify the HiSax sources, please note the following:
16
17HiSax has passed the ITU approval test suite with ELSA Quickstep ISDN cards
18and Eicon Technology Diva 2.01 PCI card.
19The certification is only valid for the combination of the tested software
20version and the tested hardware. Any changes to the HiSax source code may
21therefore affect the certification.
22
23Additional ITU approval tests have been carried out for all generic cards
24using Colognechip single chip solutions HFC-S PCI A for PCI cards as well
25as HFC-S USB based USB ISDN ta adapters.
26These tests included all layers 1-3 and as well all functional tests for 
27the layer 1. Because all hardware based on these chips are complete ISDN
28solutions in one chip all cards and USB-TAs using these chips are to be
29regarded as approved for those tests. Some additional electrical tests
30of the layer 1 which are independent of the driver and related to a
31special hardware used will be regarded as approved if at least one 
32solution has been tested including those electrical tests. So if cards 
33or tas have been completely approved for any other os, the approval
34for those electrical tests is valid for linux, too.
35Please send any questions regarding this drivers or approval abouts to 
36werner@isdn-development.de 
37Additional information and the type approval documents will be found
38shortly on the Colognechip website www.colognechip.com 
39
40If you change the main files of the HiSax ISDN stack, the certification will
41become invalid. Because in most countries it is illegal to connect
42unapproved ISDN equipment to the public network, I have to guarantee that
43changes in HiSax do not affect the certification.
44
45In order to make a valid certification apparent to the user, I have built in
46some validation checks that are made during the make process. The HiSax main
47files are protected by md5 checksums and the md5sum file is pgp signed by
48myself:
49
50KeyID 1024/FF992F6D 1997/01/16 Karsten Keil <kkeil@suse.de>
51Key fingerprint = 92 6B F7 58 EE 86 28 C8  C4 1A E6 DC 39 89 F2 AA
52
53Only if the checksums are OK, and the signature of the file
54"drivers/isdn/hisax/md5sums.asc" match, is the certification valid; a
55message confirming this is then displayed during the hisax init process.
56
57The affected files are:
58
59drivers/isdn/hisax/isac.c
60drivers/isdn/hisax/isdnl1.c
61drivers/isdn/hisax/isdnl2.c
62drivers/isdn/hisax/isdnl3.c
63drivers/isdn/hisax/tei.c
64drivers/isdn/hisax/callc.c
65drivers/isdn/hisax/l3dss1.c
66drivers/isdn/hisax/l3_1tr6.c
67drivers/isdn/hisax/cert.c
68drivers/isdn/hisax/elsa.c
69drivers/isdn/hisax/diva.c
70drivers/isdn/hisax/hfc_pci.c
71
72Please send any changes, bugfixes and patches to me rather than implementing
73them directly into the HiSax sources.
74
75This does not reduce your rights granted by the GNU General Public License.
76If you wish to change the sources, go ahead; but note that then the
77certification is invalid even if you use one of the approved cards.
78
79Here are the certification registration numbers for ELSA Quickstep cards:
80German   D133361J CETECOM ICT Services GmbH 0682
81European D133362J CETECOM ICT Services GmbH 0682
82
83
84Karsten Keil
85keil@isdn4linux.de
86
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