AVM B1 card

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AVM B1-Card V2.0 for the ISA bus.
AVM B1-Card V4.0 for the PCI bus.

AVM B1-Card is the product name of the company AVM for a built-in card for PCs that enables connection to ISDN .

In contrast to the Fritz! Card or AVM A1, the AVM B1 is an ISDN card with its own RISC processor, which is why it is referred to as an active card. Rather geared towards professional needs, this ISDN card is mainly used in servers . The active RISC technology ensures the card in the host computer for optimal memory protection, minimal memory requirements and guaranteed response times in a multitasking environment with minimum load on the computer system.

The relevance of such active ISDN cards has declined significantly due to other technologies (e.g. DSL ) and increasingly faster host computers.

This card is supported by all Microsoft Windows operating systems and by most Linux distributions via the CAPI protocol . Originally designed as an ISA card, the fourth version of the B1 card is a bus master- capable PCI plug -in card . There was also a variant as a PCMCIA card.

On December 11, 2013, AVM announced in a press release that production of the ISDN controller B1 will be discontinued and the last ISDN controller will roll off the assembly line. "AVM will no longer have a direct successor to the ISDN product family," said AVM.

Web links

Commons : AVM ISDN-Controllers  - collection of pictures, videos and audio files

Individual evidence

  1. AVM press release of December 11, 2013