Hicom

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Hicom system for around 1,200 participants

Hicom was a telephone system family from Siemens AG for private communication networks that was based on digital switching technology and ISDN performance features. Under the name Hicom, Siemens marketed both the switching systems and the digital end devices that were newly developed in addition to the usual analog telephones.

Hicom systems have been used in industry, business and administration across the entire breadth of the market, from small systems for private or small businesses to medium-sized companies to large systems and global corporate networks. They are introduced in more than 70 countries.

The first ISDN Hicom system was the large Hicom 300, which was sold and installed from 1986. The first digital terminals for this system were the two digital telephones digite 211 and digite 260 with two-wire connections. In addition, there was the multifunctional screen terminal Hicom MT 3510.

In 1988 the medium-sized ISDN system Hicom 200 was launched on the market. The Hicom 200 first came with the two-wire digital telephone set 421, which was replaced by the plug-compatible set 451 in 1991. These new telephones could also be connected to the Hicom 300.

In 1988, in addition to the Hicom 200, the small, not yet ISDN-capable Hicom 100 was launched on the market. With its still analog switching network, it first came with the four-wire connected telephones set 181 and 191, which were replaced by the set 151 on the HiCom 125/130 in 1992. The Hicom 100 only received a digital switching matrix and an ISDN exchange head in 1994.

In 1995, all three Hicom systems were converted to the standardized optiset E family of digital telephones with a two-wire connection; In the course of this conversion, the Hicom 300 became the 300E, the Hicom 200 was replaced by the Hicom 150M and the Hicom 100 was further developed into the 100E. In 1997, the Hicom 100E and 150M were replaced by the Hicom 150E, which covered both the small and medium-sized systems with a single system. Finally, the Hicom 150E and 300E were further developed in the late 1990s to the Hicom 150H and 300H, respectively; They were thus prepared for the migration to the subsequent HiPath system family, which is geared towards Voice-over-IP. Around the same time, a new generation of telephones came along; after more than 10 million optiset e-telephones, this family of telephones was replaced by the optipoint telephones , which were plug-compatible with the optiset e-telephones.

The Hicom 100E and Hicom 150E / H systems as well as the Hicom 300 were also marketed by Deutsche Telekom under the product name Octopus E. The telephones supplied were Octophon telephones, which were electrically identical to the optiset E telephones, but with their own housing design. The Hicom 200 hardware was also used by Deutsche Telekom , but completely different software was used here. This was based on the software of the Nixdorf - 8818 . In addition, the Hicom 100 (without E) and the Hicom 300 were sold by DeTeWe under the name Varix. Here the Set 181/191 devices had a handset with a modified design.

successor

literature

  • Dietrich Arbenz From drum voter to optiset E - The history of wired telephones for Siemens' private branch exchanges (1950–2000) , Herbert Utz Verlag, Munich 2009, ISBN 978-3-8316-0908-6 .
  • Horst Ohnsorge (Ed.): User-friendly communication / User-Friendly Communication. Springer Verlag, Berlin / Heidelberg 1990, ISBN 978-3-540-52536-3 .
  • Wolfgang Effelsberg, Hans W. Meuer, Günter Müller: Communication in distributed systems. Springer Verlag, Berlin / Heidelberg 1991, ISBN 978-3-540-53721-2 .

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