Realitis DLI Card

The DLI Card is an interface P.C.B. that can be used to provide 30 channels, typically referred to as one circuit of digital voice and/or
data at 64k/bits per channel, giving a maximum data rate per circuit of 2.048 megabits per second. 

The Realitis DLI can handle 3 different signalling types.
DASS = Digital Access Signalling System 30 Channels of digital voice/data typically provided by BT - the first digital voice service to be provided in the UK for PABX's.

DPNSS - Digital Private Network Signalling System.
30 channel digital voice circuit to connect 2 systems together for private networking.

Q931/ISDN30 Integrated Services Digital Network Euro Standard Digital voice circuit, again 30 channels of voice/data at 64k/bits per second.  Often referred to as 30B+D, 30xB channels to carry digitally encoded voice, and 1xB channel for end to end signalling and intelligent call information.

The DLI card can be connected to the service providers network terminating unit by either 75 ohm coax cable of 120 ohm twisted pair cabling.

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