Nortel BCM 3.7, Manual

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ISDN standards compatibility 867
Programming Operations Guide
ISDN BRI NT1 equipment
The NT1 (network termination type 1) connects an S interface (four-wire) to a U interface
(two-wire). In most cases, it connects loops from a BRI module to the network connection, which
uses the U interface.
The NT1 converts and reformats data so it can be transmitted to and from the S or T connection. In
addition, it manages the maintenance messages travelling between the network and the NT1, and
between the NT1 and the Business Communications Manager system.
The NT1 from Nortel Networks is packaged two ways:
• a stand alone package which contains one NT1 card (NTBX80XX) and a power supply
(NTBX81XX)
• a modular package which contains up to 12 NT1 cards (NTBX83XX) and a power supply
(NTBX86AA)
ISDN standards compatibility
In North America, Business Communications Manager ISDN equipment supports National ISDN
standards for basic call and calling line identification services. Business Communications
Manager BRI is compliant with National ISDN-1 and PRI is compliant with National ISDN-2.
Business Communications Manager does not support EKTS (Electronic Key Telephone System)
or CACH (Call Appearance Call Handling).
In Europe, Business Communications Manager supports ETSI Euro and ETSI QSIG standards,
and PRI SL-1 protocol.
Planning your ISDN network
Consult the Installation and Maintenance Gui de to determine a configuration of ISDN trunks and
terminal equipment (TE) for the Business Communications Manager system, then order the
appropriate ISDN capability package from your ISDN service provider.
For ISDN BRI service, your service provider supplies service profile identifiers (SPIDs), network
directory numbers (Network DNs), terminal endpoint identifiers (TEIs), and other information as
required to program your Business Communications Manager, TE and other ISDN equipment.
Business Communications Manager does not support any package with EKTS or CACH. EKTS is
a package of features provided by the service provider and may include features such as Call
Forwarding, Link, Three-Way Calling, and Calling Party Identification.