Notes

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======Networking - ISDN - Mischellaneous======

[[wp>ISDN]]

[[https://isdn-museum.de/|ISDN-Museum.de]]



=====Connect two ISDN devices to eachother======

Needs a ISDN switch/simulator/emulator in between according to:
  * [[https://community.cisco.com/t5/other-network-architecture-subjects/bri-quot-crossover-quot-cable/td-p/184466|Cisco Community - bri "crossover" cable?]]
  * [[https://community.cisco.com/t5/other-network-architecture-subjects/isdn-bri-back-to-back-cross-over-cable/td-p/143810|Cisco Community - ISDN BRI back-to-back (cross-over) cable?]]
  * [[https://community.cisco.com/t5/other-network-architecture-subjects/two-isdn-bri-interfaces/td-p/3852668|Cisco Community - Two ISDN BRI interfaces]]: <code>nfortunately you cannot connect them in back to back because ISDN has its own protocol stack.

An ISDN switch would be needed in the middle.
There are some ISDN switch emulator for testing purposes.
</code>
  * [[https://community.cisco.com/t5/vpn/how-to-connect-two-routers-back-to-back-using-isdn-bri/td-p/484804|Cisco Community - How to connect two routers back-to-back using ISDN BRI?]]: <code>SDN BRI requires a switching device in the circuit to work; it’s not as simple as reversing tip and 
ring - you could use an ISDN simulator for this purpose.

ISDN back to back is possible using the following cards: VIC-2BRI-ST & VIC-2BRI-NT/TE (NOTE, these
are mainly used for Voice applications & if I understand correctly this is not what you are looking
for)

http://www.cisco.com/en/US/tech/tk652/tk653/technologies_configuration_example09186a008010ef6c.shtml

ISDN simulator is the best bet.
</code>


The following sources suggest two devices can be connected with their BRI interfaces:
  * [[https://community.cisco.com/t5/ip-telephony-and-phones/how-to-connect-two-routers-via-bri-isdn/td-p/2119968|Cisco Community - How to connect two Routers via BRI ISDN?]] using a BRI cross cable as described on [[https://www.cisco.com/c/en/us/support/docs/voice/digital-ccs/15415-bri-voice-port-cfg.html|Cisco Configuring Network Side ISDN BRI Voice Interface Cards]]

[[https://www.freeccnaworkbook.com/blog/ccna/how-to-make-a-t1-crossover|Free CCNA Workbook - How to make a T1 Crossover Cable]]  for use with WIC-1T cards.


=====Simulators/Emulators=====

Searching for "isdn emulator"/"isdn simulator" on ebay gives results varying from EURO 150 - 900.

[[https://www.gl.com/isdn-protocol-emulator.html|GL Communications Inc. - PRI ISDN Protocol Emulator]] provides a commercial ISDN Emultor.

arcatech products:
  * [[https://arca-technologies.com/maxhome.shtml|BRI, PRI and PSTN FXS Simulator Overview]]
  * [[https://arca-technologies.com/ultrahome.shtml|BRI and PRI Simulator emutel Ultra Overview]]
  * [[https://arca-technologies.com/solohome.shtml|emutel™ Solo Basic Rate ISDN Simulator Overview]]
  * [[https://www.arca-technologies.com/emutelsymphonyhome.shtml|emutel™ Symphony ISDN & PSTN Simulator Overview]]