ISDN & Protocols
ikon ISDN and Protocol Software
Layer 3 Protocol Software
The ikon ISDN and Protocol Software consists of a
various Modules that reflect the different Protocol
Layers, the Management and the OS Abstraction
Module. An optional Message Router Module may
be included to divide the Software Modules in
Onboard part and Host part. It is available in “C”
Source Code or in Binary format for integration in
Customer specific Products.
Besides the Signalling Protocols DSS-1,
transparent Layer 3 is available if a Signalling
Protocol is not needed.
PBX Client / Host
Layer 1
Drv 3
Drv 4
Drv 5
Drv n
ISDN Hardware
PBX Application
The ikon PBX Software is a CAPI 2.0 based
Application implementing PBX Functionality. It is
built as a Client and a Host Software and may
therefore easily be used in distributed Systems.
OS Abstraction
B config.
B transp.
Message Router
Drv 2
DSS-1 (Euro-ISDN) / 1TR6
User Application
CAPI 2.0
Drv 1
All Layer 3 Modules support multiple Links.
The DSS-1 Software Module is compatible to
ETS 300 403. It is certified for use in Europe
on several Hardware and Operating System
Platforms. It includes the Basic Call Services
as well as Supplementary Services like Hold,
Charging Information, Retrieve, Calling Line
Presentation and Explicit Call Transfer.
DSS-1 is available for PRI (S2M) and BRI (S0)
Point-to-Point and Point-to-Multipoint, User
side and Network side.
1TR6 is the Predecessor of DSS-1.
QSIG is used for PBX Interconnection by
major PBX Manufacturers. It is implemented
according to the ECMA Specifications and
includes the Basic Call Services plus Supplementary Services like Hold, Call Transfer and
Three Party.
It is available for PRI and BRI Links.
CAPI 2.0
Common ISDN API V2.0 (CAPI 2.0) is the most
commonly used API for ISDN Applications. The ikon
Implementation of CAPI is based on the actual 4th
Edition of the CAPI 2.0 Specification and is preimplemented with the ikon ISDN Protocol Stacks. In
Addition to the Messages defined in CAPI Specifications Manufacturer specific Extensions are
available, e.g. for the Support of direct Layer 2
Communications, NT Mode or Layer 1 Alarms.
The ATS-QSIG Layer 3 Protocol is standardized in ECMA 312. It is recommended by
EUROCONTROL for use in Air Traffic
Services Voice Networks.
The Interface to Layer 3 of the ISDN or DECT
Protocol Stack is based on the Primitives defined by
ETSI or ITU and may therefore easily be adapted to
other Protocol Stacks.
The ikon ATS-QSIG Implementation was
tested and certified by EUROCONTROL.
DPNSS-1 is used for PBX Interconnection by
certain PBX Manufacturers, like Northern
Telecom and Ericsson. It is implemented
according to the BT specifications. It includes
Basic Call Services as well as Supplementary
ikon GmbH
Benzstrasse 17
89079 Ulm
fon +49 731 94661-0
fax +49 731 94661- 61
web www.ikon-gmbh.de
e-mail info@ikon-gmbh.de
Services like Hold, Call Transfer and Three Party.
DPNSS-1 is available for PRI links only.
Layer 2 Protocol Software
The ikon Layer 2 Software Modules may be used
for ISDN Applications as well as for standard Data
Transmission Applications. If no Data Link Layer is
needed, a transparent Layer 2 is also available.
All Layer 2 Modules support multiple Links.
LAPD conforms to Q.921 and ETS 300 402.
For use with ISDN Signalling, LAPD is available for
Point-to-Point and Point-to-Multipoint Connections,
User side and Network side. It is certified for use in
Europe together with DSS-1 and 1TR6.
LAPB (X.75)
LAPB (X.75) is used for transporting User Information. It supports Point-to-Point Connections and
is completely symmetrical.
It is used on the B-Channels of an ISDN Link.
HDLC is also used as Data Link Layer for transporting User Information. The ikon Implementation
supports the Balanced Mode Operation Class.
The DPNSS-1 Data Link Layer is tightly coupled
with the DPNSS-1 Signalling Protocol. It is only
used for DPNSS-1 Point-to-Point connections.
Layer 1 Software Module
Management Module
The Management Module allows easy
Configuration of the Communication Stack. It
also supports the Configuration of the Physical Interface and the Activation / Deactivation
of the selected Protocols.
OS Abstraction Module
The OS Abstraction Module is used for porting
the ikon ISDN & Protocol Software to other
Operating Systems. Porting files for Windows,
Linux, VxWorks ,pSOS+, and OS-9 are
already available
Message Router Module
The Message Router Module is used to split
the Communication Stack in a Board and a
Host part.
ikonOS incl. TCP/IP
ikonOS is a self-developed Micro-Kernel with
all necessary Functionalities to implement
small Applications, e.g. an ISDN Card
Software. ikonOS supports Memory and
Buffer Allocation, Mailboxes, Timer Services
and Communications via serial Interfaces or
ikon Portfolio (Excerpt)
IP-DECT System
Various Protocol Stacks
The ikon Layer 1 Module interfaces between the
Device Drivers and the Mailbox oriented upper
Layer Stacks (e.g. for ISDN, DECT or ATM).
Brief Description of ikon GmbH
Besides the pure Data Transfer, the Layer 1 Module
supports Activation and Deactivation of Channels,
Transmission of Voice Messages and Tones,
Interconnection of Channels incl. Conferences,
Bundling of Channels and Jitter Buffer
ikon GmbH delivers Products and Development Services with main Focus on Telecommunications. Since its Foundation in 1988
ikon GmbH is a reliable Partner for customer
specific Development in the Telecommunication Sector.
Driver Software
The available Drivers support ISDN PRI, BRI,
channelized E1/T1 and standard serial Links as
described in the following Section.
Besides supporting Hardware Devices, Drivers for
Data Transport over TCP/IP or Tone Generation
and Announcement are also available.
Please refer to our Driver data sheet for a detailed
ikon-ISDN-Software.pdf V1.5
Professional Services
Parts of our Product Portfolio are several
Protocol Stacks and Software Modules for
Technologies like ATM, DECT, ISDN, VoIP,
Frame Relay, MPLS, IP-Routing and V5.x.
Trademarks: All trademarks, product and company
names used on this data sheet belong to the appropriate
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