National Isdn 2 Tr-1268 Primary Rate Interface - Nortel Meridian Meridian 1 Feature Description And Administration

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553-2901-301 Standard 9.00 January 2002

National ISDN 2 TR-1268 Primary Rate Interface

The Meridian 1 supports the following call services on the NI-2 interface:
• Basic call service
• Circuit-mode bearer capabilities (speech, 3.1 kHz audio, 64 kbps digital,
and adapted 56 kbps to 64 kbps digital)
• Enbloc sending
• Channel negotiation
• In-band tone and announcement
• Calling number delivery
• Calling Party Number Privacy, using the Calling Party Name
feature (*67)
• A back-up D-channel is provided to improve the reliability of an ISDN
PRI interface that consists of more than one Digital Signal Level 1 (DS1)
facility. The primary and back-up D-channels reside on the 24th channel
of separate DS1 facilities. Both D-channels provide signaling
information for the interface, but only one can be in service at any given
time.
The Meridian 1 does not support the following TR-1268 functionalities:
• Packet Mode Unrestricted Digital Information bearer capability
• Circuit Mode Unrestricted Digital Information at n x 64 kbps, H
channels bearer capability (due to the lack of hardware support of
providing contiguous timeslots)
• Up to two Calling Party Number information elements for terminating
calls
• Up to two redirecting numbers provided for originating and terminating
calls
• Subaddressing
• Calling party number privacy on subscription basis
• Call-by-Call Service Selection, and
• Switched DS1/Switched Fractional DS1 Service.
and H
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