This FAQ describes how to configure different
hosts to use TCP/IP
connections over ISDN. The basic ideas will be explained within
this paper. At
the end of this document important mapping functions will be
explained.
The illustration below shows different machines, that use the
service tcp/ip
over ISDN . Some hosts are connected to an ISDN basic rate
adapter, others are
connected to an ISDN primary rate adapter. Four machines are
using Euro ISDN
and three machines are using the german ISDN.
______________________________________________
| euro_S0 (Rel.>=4.2 (MSN1) (MSN2)
| ISDN-CLI : +49 911 994715 +49 911 994716 DSS1 - S0
| ISDN-IP-IF : 200.1.1.1
| PABX-Escape: UNIX
|______________________________________________
______________________________________________
| german_PRI
| ISDN-CLI : +49 89 888888 | 1TR6 - PRI
| ISDN-IP-IF : 200.1.1.2
| PABX-Escape: UNIX
|______________________________________________
______________________________________________
| euro_PRI (Rel.>=4.x
| ISDN-CLI : +49 911 333333 DSS1 - PRI
| ISDN-IP-IF : 200.1.1.3
| PABX-Escape: UNIX
|______________________________________________
______________________________________________
| german_S0
| ISDN-CLI : +49 911 123456 1TR6 - S0
| ISDN-IP-IF : 200.1.1.4
| PABX-Escape: UNIX
|______________________________________________
______________________________________________
| german_pabx
| ISDN-CLI : +49 911 9673-25 | 1TR6 - S0|
| ISDN-IP-IF : 200.1.1.5 PABX
| PABX-Escape: 0 UNIX
|______________________________________________
______________________________________________
| euro_dos (Rel.>=1.44 (MSN1)
| ISDN-CLI : +49 40 222333 DSS1 - S0
| ISDN-IP-IF : 200.1.1.7
| PABX-Escape: DOS
|______________________________________________
The configuration of the example will be explained in detail for
every host.
The files services and hosts (to find in the directory
/usr/isi/config or
/usr/bianca/config) are the same on every machine:
SERVICES (for each machine except euro_dos)
------------------------------------------------------------------------
LOCAL isitools 0070001
LOCAL tcp/ip 0070002 T.70;X.75
LOCAL tcp/ip2 0070002 NOL3;X.75
* isitools 007000
* tcp/ip 007000 T.70;X.75
* tcp/ip2 007000 NOL3;X.75
------------------------------------------------------------------------
Remark:
-------
The service isitools is bound with the local address 0070001
(i.e.
the EAZ 1 is used to select this service) and the service tcp/ip2
is bound
with the local address 0070002 (i.e. the EAZ 2 is used for the
selection of
the tcp/ip2 service). For outgoing calls ( * entries) the EAZ is
defined in
the file hosts. The term EAZ will be explained in the appendix.
HOSTS (for each machine except euro_dos)
------------------------------------------------------------------------
euro_S0_1 49.911.994715. # isitools
euro_S0_2 49.911.994716. # tcp/ip2
german_PRI_1 49.89.8888881. # isitools
german_PRI_2 49.89.8888882. # tcp/ip2
euro_PRI_1 49.89.3333331. # isitools
euro_PRI_2 49.89.3333332. <49.89.3333330. # tcp/ip2
german_S0_1 49.911.1234561. # isitools
german_S0_2 49.911.1234562. # tcp/ip2
german_pabx_1 49.911.9673.251 # isitools
german_pabx_2 49.911.9673.252 # tcp/ip2
euro_dos 49.40.2223332. # tcp/ip2
------------------------------------------------------------------------
Remark:
-------
The last digit of the ISDN numbers of the german hosts (using
1TR6
!) is the EAZ, i.e. every german host has 2 different numbers
corresponding
to the 2 different ISDN services being provided by this host. The
hosts using
DSS1, which are connected to an ISDN basic access, has also 2
different
numbers; By means of the 2 Multiple Subscriber Numbers (MSN, see
appendix)
the appropriate ISDN service will be selected. For the PRI host
using DSS1
there also are 2 defined numbers, although it has got only one
subscriber
number: the primary access is configured as PABX connection, i.e.
digits
being sent after the subscriber number 333333 will be interpreted
by the
host (as the terminal equipment). This is known as direct dial in
(DDI).
Remark:
-------
The Calling Line Identification (CLI .. sent by the exchange) of
a
DSS1 S2M line with DDI capability will have a 0 at the end. This
0 is actually
sent by the ISDN exchange. therefore the line for the tcp/ip
entry contains
a number for outgoing calls and a number for incoming calls.
------------------------------------------------------------------------
MACHINE: euro_S0
------------------------------------------------------------------------
This host is connected to an ISDN basic access with the D channel
protocol
DSS1. The release of the BinTec software is 4.2 or higher.
ISI (/etc/default/isi)
------------------------------------------------------------------------
...
BASE_myhost=euro_S0_1
...
------------------------------------------------------------------------
IPIF
------------------------------------------------------------------------
NET is0 TYPE isdn ADDR 200.1.1.1
------------------------------------------------------------------------
IP
------------------------------------------------------------------------
INET 200.1.1.2 ISDN german_PRI_2,tcp/ip2
INET 200.1.1.3 ISDN euro_PRI_2,tcp/ip2
INET 200.1.1.4 ISDN german_S0_2,tcp/ip2
INET 200.1.1.5 ISDN german_pabx_2,tcp/ip2
INET 200.1.1.7 ISDN euro_dos,tcp/ip2
------------------------------------------------------------------------
BOARDS
------------------------------------------------------------------------
0 ielc -1 u_dss1_pmp -e1=4715 -e2=4716
------------------------------------------------------------------------
Remark:
-------
The boards file takes care of loading the appropriate D channel
driver. Incoming calls for the first MSN (49.911.994715.) will be
recognized
and mapped to EAZ 1. Consequently incoming calls for the second
MSN
(49.911.994716.) will be mapped to EAZ 2. On outgoing calls, the
reverse
mapping will take place, i.e. an outgoing call from EAZ 1 will be
mapped to an
outgoing call from the first MSN. By this mechanism all the known
1TR6
configuration ideas can be used.
------------------------------------------------------------------------
MACHINE: german_PRI
------------------------------------------------------------------------
This host is connected to an ISDN primary access with D channel
protocol
1TR6 (the EAZ feature has to be supported).
ISI
------------------------------------------------------------------------
...
BASE_myhost=german_PRI_1
...
------------------------------------------------------------------------
IPIF
------------------------------------------------------------------------
NET is0 TYPE isdn ADDR 200.1.1.2
------------------------------------------------------------------------
IP
------------------------------------------------------------------------
INET 200.1.1.1 ISDN euro_S0_2,tcp/ip2
INET 200.1.1.3 ISDN euro_PRI_2,tcp/ip2
INET 200.1.1.4 ISDN german_S0_2,tcp/ip2
INET 200.1.1.5 ISDN german_pabx_2,tcp/ip2
INET 200.1.1.7 ISDN euro_dos,tcp/ip2
------------------------------------------------------------------------
BOARDS
------------------------------------------------------------------------
0 ielc -1 u_1tr6_s2m
------------------------------------------------------------------------
------------------------------------------------------------------------
MACHINE: euro_PRI
------------------------------------------------------------------------
This host is connected to an Euro ISDN primary rate interface.
The release of
the BinTec software has to be 4.X. The primary rate interface is
configured
with the feature direct dial in, i.e. digits being sent after the
subscriber
number will be interpreted by the host (ISDN software).
ISI
------------------------------------------------------------------------
...
BASE_myhost=euro_PRI_1
...
------------------------------------------------------------------------
IPIF
------------------------------------------------------------------------
NET is0 TYPE isdn ADDR 200.1.1.3
------------------------------------------------------------------------
IP
------------------------------------------------------------------------
INET 200.1.1.1 ISDN euro_S0_2,tcp/ip2
INET 200.1.1.2 ISDN german_PRI_2,tcp/ip2
INET 200.1.1.4 ISDN german_S0_2,tcp/ip2
INET 200.1.1.5 ISDN german_pabx_2,tcp/ip2
INET 200.1.1.7 ISDN euro_dos,tcp/ip2
------------------------------------------------------------------------
BOARDS
------------------------------------------------------------------------
0 pmx -1 u_dss1_s2m -e1=3331 -e2=3332
------------------------------------------------------------------------
Remark:
-------
Although you have only one number at a DSS1 S2M line you can
reach the connection with subsequent digits, e.g. 1, 2, ..
When you call this line with 0911 3333331 the Called party number
(-> pmxtrace) will be 3333331. With the mapping -e1=3331 the
call
will be given to the EAZ 1.
------------------------------------------------------------------------
MACHINE: german_S0
------------------------------------------------------------------------
This host is connected to an ISDN basic access with D channel
protocol 1TR6
(the EAZ feature has to be supported).
ISI
------------------------------------------------------------------------
...
BASE_myhost=german_S0_1
...
------------------------------------------------------------------------
IPIF
------------------------------------------------------------------------
NET is0 TYPE isdn ADDR 200.1.1.4
------------------------------------------------------------------------
IP
------------------------------------------------------------------------
INET 200.1.1.1 ISDN euro_S0_2,tcp/ip2
INET 200.1.1.2 ISDN german_PRI_2,tcp/ip2
INET 200.1.1.3 ISDN euro_PRI_2,tcp/ip2
INET 200.1.1.5 ISDN german_pabx_2,tcp/ip2
INET 200.1.1.7 ISDN euro_dos,tcp/ip2
------------------------------------------------------------------------
BOARDS
------------------------------------------------------------------------
0 ielc -1 u_1tr6_pmp
------------------------------------------------------------------------
------------------------------------------------------------------------
MACHINE: german_pabx
------------------------------------------------------------------------
This host is connected to an ISDN basic access of a PABX with D
channel
protocol 1TR6 (the EAZ feature has to be supported).
ISI
------------------------------------------------------------------------
...
BASE_myhost=german_pabx_1
BASE_escape=0
BASE_national=00
BASE_internat=000
BASE_iescape=
BASE_inational=0
BASE_iinternat=00
...
------------------------------------------------------------------------
IPIF
------------------------------------------------------------------------
NET is0 TYPE isdn ADDR 200.1.1.5
------------------------------------------------------------------------
IP
------------------------------------------------------------------------
INET 200.1.1.1 ISDN euro_S0_2,tcp/ip2
INET 200.1.1.2 ISDN german_PRI_2,tcp/ip2
INET 200.1.1.3 ISDN euro_PRI_2,tcp/ip2
INET 200.1.1.4 ISDN german_S0_2,tcp/ip2
INET 200.1.1.7 ISDN euro_dos,tcp/ip2
------------------------------------------------------------------------
BOARDS
------------------------------------------------------------------------
0 ielc -1 u_1tr6_pmp
------------------------------------------------------------------------
------------------------------------------------------------------------
MACHINE: euro_dos
------------------------------------------------------------------------
This host is connected to Euro ISDN basic rate interface. The
release of the
BinTec software is 1.44 or higher.
ISI
------------------------------------------------------------------------
...
BASE_myhost=euro_dos
...
IP_defaultservice=tcp/ip2
...
------------------------------------------------------------------------
SERVICES
------------------------------------------------------------------------
LOCAL tcp/ip2 0070002 NOL3;X.75
* tcp/ip2 007000 NOL3;X.75
------------------------------------------------------------------------
HOSTS (for each machine except euro_dos)
------------------------------------------------------------------------
euro_S0_2 49.911.994716. # tcp/ip2
euro_PRI_2 49.89.3333332. <49.89.3333330. # tcp/ip2
german_S0_2 49.911.1234562. # tcp/ip2
german_pabx_2 49.911.9673.252 # tcp/ip2
german_PRI_2 49.89.8888882. # tcp/ip2
euro_dos 49.40.2223332. # tcp/ip2
------------------------------------------------------------------------
IP
------------------------------------------------------------------------
INET 200.1.1.7 ISDN euro_dos,tcp/ip2
INET 200.1.1.1 ISDN euro_S0_2,tcp/ip2
INET 200.1.1.2 ISDN german_PRI_2,tcp/ip2
INET 200.1.1.3 ISDN euro_PRI_2,tcp/ip2
INET 200.1.1.4 ISDN german_S0_2,tcp/ip2
INET 200.1.1.5 ISDN german_pabx_2,tcp/ip2
------------------------------------------------------------------------
BIANCA.CFG
------------------------------------------------------------------------
...
EAZ2=2333
...
------------------------------------------------------------------------
Remark:
-------
There is no IPIF file here, so the own IP address has to be
configured in
the IP file.
------------------------------------------------------------------------
APPENDIX I
------------------------------------------------------------------------
Important Mappings
------------------
A: The mapping from 1TR6 to DSS1
---------------------------------
There is a well defined mapping according to the 1TR67
specification.
This mapping is used at the ISDN drivers site.
ISDN 1TR6
---------
A setup packet within the 1TR6 protocol contains the values
Service Indicator
(SI) and Additional information (AI). Common values are SI=007
and AI=000.
When the setup packet arrives at the "border switch"
(linking the german ISDN
and the Euro ISDN) this values will be mapped to a distinct
element of
DSS1, i.e. a setup packet with SI and AI values will be mapped to
a setup
packet, which contains the Euro ISDN protocol element:
"Bearer Capability: unrestricted digital information
(64Kbits/s)"
ISDN DSS1
---------
The BinTec configuration originates from the german ISDN (1TR6).
Therefore
the file services contains the values:
Service Indicator (SI) and
Additional Information (AI)
as part of the local address. When an outgoing call is set up,
the
configuration 007000 will be mapped to the Euro ISDN protocol
element
"Bearer Capability: unrestricted digital information
(64Kbits/s)".
The outgoing setup packet will contain this information.
For an incoming call the situation is just the opposite: When a
setup
packet with the Euro ISDN protocol element
"Bearer Capability: unrestricted digital information
(64Kbits/s)"
will arrive at the driver site, the software will - caused by the
mapping -
transform this back to the value 007000
(SI+AI), i.e. the appropriate 1TR6 element will be generated.
B: The mapping from an EAZ to a Multiple Subscriber Number (MSN)
-----------------------------------------------------------------
As mentioned above the BinTec ISDN configuration originates from
1TR6.
A part of 1TR6 is the EAZ feature, which is used as a number to
select a
unique device at the S0 bus.
To introduce the EAZ feature to the Euro ISDN, BinTec maps MSN's
to EAZ's.
Example:
--------
euro_S0 has the MSN's 49.911.994715. and 49.911.994716.
Incoming calls for the first MSN will be mapped to the EAZ 1 and
incoming
calls for the second MSN will be mapped to the EAZ 2 (file
boards).
This mapping is performed by the ISDN driver of the BinTec
software.
When a host calls the first MSN (49.911.994715) the ISDN driver
of
euro_S0 will map this MSN to the EAZ 1. By this mechanism the
BASE-software
will be able to use the EAZ facility.
------------------------------------------------------------------------
APPENDIX II
------------------------------------------------------------------------
Terms
-----
MSN
---
Multiple ISDN numbers can be assigned to one single ISDN
interface (e.g.
3 in germany, 2 in sweden). Each of this Multiple Subscriber
Numbers will
terminate at the same equipment.
EAZ
---
Actually this term is only of importance within the german ISDN.
But
nevertheless we used it within our configuration. The EAZ is of
significance,
if several devices are connected to the same S0 bus and these
devices are
responsible for the same service (e.g. 3 telephones).
To address one specific device (among other devices providing the
same
service) the EAZ is used.
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