Chapter 15 Integrated Services Data Network (ISDN)

For connections of 24PRT and transmission line, twisted-pair cable can be used. For connection of 30PRT and transmission line, either coaxial cable or twisted pair cable can be used.

Note: ISDN requires B8ZS Line coding with Extended Superframe (ESF) format.

BRT

The Basic Rate Interface Trunk (BRT) provides one or two physical interface to the ISDN-Basic Rate Interface service (192 kbps PCM-2B + D).

The BRT has the following functions.

Unipolar/Bipolar Conversion (AMI/B8ZS Format) (S/T Interface)

Signaling Insertion/Extraction

Frame Synchronization

Digital PAD on Voice Signal Transmission

For connections of BRT and transmission line, twisted-pair cables can be used.

Note: We recommend the point-to-point connection when connecting the system to the public network using the BRT card (Set the second data of CM35 Y=79 to 0). For the point-to-multipoint connection using the BRT card, when the system is established far from the public network, a communication error occurs easily because the ISDN signal fades away.

UNIVERGE NEAX 2000 IPS Request For Proposal (RFP) Reference Guide

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NEC 2000 IPS manual Brt