The Abilis ISDN-PRI ports are electrically configured like Telecom NT1 ports, so:
To connect the ports to “Terminal Equipment” systems (telephone switchboards, TA, ISDN modem, FAX …) you must use a Ethernet crossed cable cat.5 and ISDN “cross-cable (crossed) cat.5” (usually provided with red shells). Set up the ports at a logical level as NT (Network Termination) in the Abilis configuration.
To connect the ports with the Telecom lines, you must use a “Ethernet cross-cable (crossed) cat.5”. Set up the ports at a logical level as TE (Terminal Equipment) in the Abilis configuration.