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ISDN-Controller B1 v2.0

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ISDN-Controller B1-Bild4.jpg
ISDN-Controller B1 v2.0


The ISDN-Controller B1 v2.0 is the successor model of the ISDN-Controller B1 v1.4, an active ISA ISDN controller based on a 20MHz RISC Transputer. The successor model with optional Plug-and-Play support and RJ-45 connector instead of the Sub-D is the ISDN-Controller B1 v3.0.


  • Jonathan Schilling's research article about the B1 v2.0 and mods to drive a T1 / T1-B with it. (german)

Daily updated index of all ISDN-Controller B1 v2.0 websites. Last update: 2023-12-02 04:02 GMT.

Legend:   on = live URL.   -   host = hosted here.   -   arc = from archive.org.   -   nonpub = non public.   -   dead = dead link.   -   Bold = service portal.


Daily updated index of all ISDN-Controller B1 v2.0 downloads. Last update: 2023-12-02 04:59 GMT.

Legend:   on = live URL.   -   host = hosted here.   -   arc = from archive.org.   -   nonpub = non public.   -   dead = dead link.   -   Bold = latest firmware.


Daily updated index of ISDN-Controller B1 v2.0 part numbers. Last update: 2023-11-15 14:09 GMT. Click an EAN/GTIN or MPN to search the web for it.
If you know any part numbers not listed here yet, expecially OEM and country specific versions, then please get in touch.

Legend:   ok = supported   -   eos = EOS   -   sold = still sold   -   dead = not sold any more   -   Bold = maintained Icecat entry   -   Italic = logistic entry without datasheet


Selectors >> PSU-Selector >> ISDN-Controller B1 v2.0   -   Showing recommended Power-Supply units.

PSU-Selector Type L. Min Max In Min Max Max Max Out Out Curr Pwr Out2 Out2 Curr2 Pwr2 Cap. Vend. Nick Alias
0 power supply units

Selectors >> Cable+Adapter-Selector >> ISDN-Controller B1 v2.0   -   Showing recommended Cables+Adapters.

Cable+Adapter-Selector Type Length Wires Shield Conn1 Gender Conn2 Gender Conn3 Gender Conn4 Gender
0 cables and adapters


If you want to extend the gallery with own work then please get in touch. See also the Photography-Inspiration article.

Jonathan Schilling's Modifications explained here (german)

The first mod increases the INMOS Link speed to 20 Mbps. The second mod uses the TRAM alike connectors and 2 MAX3467 RS422 converters to build a link interface which is compatible to the ISDN-Controller T1 and ISDN-Controller T1-B. The third mod is still unknown.


The Versions section intends to compare different hardware revisions of a device.
If you could provide images of a revision not listet here yet then please get in touch.



PCB mounted:

  • IO-Adress - Jumpers - to choose the I/O adress of the card - 150 / 250 / 300 / 340

Slot plate:

Bus connector:


  • TODO


Selectors >> Components-Selector >> ISDN-Controller B1 v2.0   -   Chips may occur multiple times if different types were found in probes.

Cat. Qty. Component Purpose Family Coden. Vendor Description
SoC 1x IMST400-X20I Transputer T400 ST 20MHz 32-bit RISC-Transputer without FPU
RAM 2x UPD424270-70 DRAM D-512K Elpida FPM DRAM 70ns, 256K x 16bit = 512KB
RAM 2x GM71C4270AJ70 DRAM D-512K Hynix FPM DRAM 70ns, 256K x 16bit = 512KB
Flash 1x ST93C461 EEPROM EEPROM-128 Microchip EEPROM, 1K x 1bit = 128B
FPGA 1x A1010B FPGA ACT1 Microsemi 1200 Logic Gates FPGA
FPGA 1x TPC1010AFN-068 FPGA TPC1010 TI 1200 Logic Gates FPGA
FPGA 1x PALCE22V10Q-25JC4 PAL PALCE22V10 AMD 24-Pin EE Programmable Array Logic
FPGA 1x TICPAL22V10Z-25CFN PAL 22V10 TI 24-Pin Programmable Array Logic
FON 1x SAB82525-N ISDN-Ctrl HSCX HSCX Lantiq High-Level Serial Communications Controller Extended
FON 1x PEB2086H V1.1 ISDN-PHY ISAC ISAC-S Lantiq ISDN Subscriber Access Controller
Trafo 2x UT21711 ISDN-PHY UMEC External ISDN S0 Line Transformer
Trafo 1x UT28103 ISDN-PHY UMEC Common Mode Choke / Data Line Filter (4-wire)
Trafo 2x L4097-X011-80 ISDN-PHY VAC External ISDN S0 Line Transformer
Trafo 1x N4021-X003-80 ISDN-PHY VAC Common Mode Choke / Data Line Filter
Misc 1x SN74HCT273 Bus-Iface 74273 TI Octal D-Type Flip-Flops With Clear
Misc 1x SN74LS245 Bus-Iface 74245 TI Octal Bus Transceivers With 3-State Outputs
Misc 1x IMSCO11-E20S Bus-Iface IMSCO1x ST 8-Bit Bus to Inmos Serial Link Adapter
Misc 1x SN74LS367A Bus-Iface 74367 TI Hex Bus Drivers With 3-State Outputs
Misc 1x SN74ACT16823 Bus-Iface 7416823 TI 18-Bit Bus-Interface Flip-Flops With 3-State Outputs
Misc 1x SN74LS368A Bus-Iface 74368 TI Hex Buffers And Line Drivers
Misc 1x SN74HCT02 Logic 7402 TI Quad 2-Input Positive-NOR Gates
Misc 1x SN75188 RS-232 MC148x TI Quad RS-232 Line Drivers
Misc 1x SN75189A RS-232 MC148x TI Quad RS-232 Line Receivers
Misc 1x COM81C17 UART 81C17 Microchip Universal Asynchronous Receiver and Transmitter

TODO: Property:IMST400-X20I OR Property:UPD424270-70 OR Property:GM71C4270AJ70 OR Property:ST93C461 OR Property:TPC1010AFN-068 OR Property:TICPAL22V10Z-25CFN OR Property:PALCE22V10Q-25JC4 OR Property:A1010B OR Property:PEB2086H V1.1 OR Property:SAB82525-N OR Property:SN75188 OR Property:SN75189A OR Property:IMSCO11-E20S OR Property:SN74ACT16823 OR Property:COM81C17 OR Property:SN74HCT273 OR Property:SN74LS245 OR Property:SN74LS367A OR Property:SN74LS368A OR Property:SN74HCT02 OR Property:UT21711 OR Property:UT28103 OR Property:L4097-X011-80 OR Property:N4021-X003-80


Accessory-Index34 +
Accessory-LogoImage:ISDN-Controller B1-Bild4.jpg +
Accessory-ModelISDN-Controller B1 v2.0 +
Accessory-Nickb120 +
Accessory-TypeISDN-Card +
Accessory-VendorAVM +
ArchitectureTransputer +
Bus-ISA16true +
CPU-Clock20 MHz +
CPU-Cores1 +
Card-BusISA16 +
Card-Typeactive +
Casing-Colourgreen +
Downloads65 +
Driver-DOStrue +
Driver-Linuxtrue +
Driver-Netwaretrue +
Driver-OSWin2K +, Win3x +, Win95 +, Win98 +, WinME +, WinNT +, WinXP +, DOS +, Netware +, OS2 + and Linux +
Driver-OS2true +
Driver-Win2Ktrue +
Driver-Win3xtrue +
Driver-Win95true +
Driver-Win98true +
Driver-WinMEtrue +
Driver-WinNTtrue +
Driver-WinXPtrue +
FON-ChipsProperty:PEB2086H V1.1 + and Property:SAB82525-N +
FONS0-DSUB9Ftrue +
FPGA-ChipsProperty:TPC1010AFN-068 +, Property:TICPAL22V10Z-25CFN +, Property:PALCE22V10Q-25JC4 + and Property:A1010B +
Flash-ChipsProperty:ST93C461 +
ISDN-Lines2 +
ISDN-Phones1 +
Manual.dehttp://web.archive.org/web/20040512022829/http://www.avm.de/de/Service/FAQs/dokumente/Handbuch_B1_v2_0.pdf +
Misc-ChipsProperty:SN75188 +, Property:SN75189A +, Property:IMSCO11-E20S +, Property:SN74ACT16823 +, Property:COM81C17 +, Property:SN74HCT273 +, Property:SN74LS245 +, Property:SN74LS367A +, Property:SN74LS368A + and Property:SN74HCT02 +
Model-GroupISDN +
OwnerUser:Rubberduck + and User:Jonathan Schilling +
Product.dehttp://web.archive.org/web/19981201194924/http://www.avm.de/deutsch/aktivb1.htm +
Product.inthttp://web.archive.org/web/19981205153401/http://www.avm.de/english/aktivb_e.htm +
RAM0.5 MB +
RAM-ChipsProperty:UPD424270-70 + and Property:GM71C4270AJ70 +
Salesdead +
SoCT400 +
SoC-ChipsProperty:IMST400-X20I +
Sort-Index99.34 +
Supporteos +
Technical.dehttp://web.archive.org/web/19981206015449/http://www.avm.de/deutsch/details/b1.htm + and http://web.archive.org/web/19990302060913/www.avm.de/deutsch/r0497-2.htm +
Technical.inthttp://web.archive.org/web/19981203015257/http://www.avm.de/english/details/b1_e.htm +
Trafo-ChipsProperty:UT21711 +, Property:UT28103 +, Property:L4097-X011-80 + and Property:N4021-X003-80 +
Websites7 +
White-Paper.dehttp://web.archive.org/web/19981202163742/http://www.avm.de/deutsch/w0397-3.htm + and http://web.archive.org/web/19981202163742/http://www.avm.de/deutsch/w0397-4.htm +