2 x E1 ISDN Reference Design
The 2xPRI ISDN reference design board provides two primary rate E1/T1 interfaces (IF's) with PCI PC bus interface. Each of the E1/T1 interface can operate in TE mode (user mode) oder in NT mode (network mode). The configuration can get applied by onboard jumpers.
The ISDN board supports DSS1 signalling system. Driver support was developed for Windows NT4.0 as well as Window 2000 operating system. A sophisticated clocking logic enables easy configuration of the clock sources. Additionally support for automatic identification and switch to E1/T1 interfaces is implemented. LEDs on the backplan show details on the activation and synchronous status.
A watchdog logic is featured and can get activate when necessary. In case that the watch dog timer is - for any reason - not longer triggered by the application, the on board relays pass through by short cuttin NT and TE mode.
The 2xPRI board features a MVIP connector enabling cross connection of several PC boards within one PC system providing MVIP I/F connectors. The application of this ISDN board is valid for least cost router, VoIP systems or PC based PABX solutions.
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