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Download ISDN Basic Rate Interface Feature Fundamentals
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330 ISDN BRI features Meridian Mail Trunk Access Restriction This feature does not support Call Transfer from ISDN BRI sets. Message Center A call originating by an ISDN BRI terminal to a non-ISDN BRI terminal can be redirected to Network Message Service - Message Center. The associated MIK/MCK and the lamp states are not supported for the corresponding ISDN BRI terminal. Multifrequency Compelled Signaling features R2 and MFC signaling on DID and TIE trunks This feature allows line and register signaling on DID and TIE trunks, using an MF sender and receiver card. Each forward signal sent to the Central Office is acknowledged by a backward signal. This feature also allows the system to request Calling Number Identification (CNI) information, to be shown on the originating terminal’s display. The register signaling part of this feature is supported for ISDN BRI. The CNI display is not supported. Multifrequency Signaling for Socotel (MFE) Multifrequency Signaling for Socotel (MFE) is similar to R2 Multifrequency Compelled (MFC) Signaling, but is not compelled in the same way. Instead of each signal being answered by another signal of some meaning, each signal is answered by a control frequency which indicates to the other end of the call that the signal has been received and its transmission can cease. In this way, signals can originate at either end of the call. R2 MFC Signaling operates by answering each forward signal from the originating end, with a backward signal from the terminating end. Each signal must be interpreted using the appropriate table. Unlike R2 MFC Signaling, backward and forward signals use the same frequency combinations. The need for the concept of an incoming or outgoing sender/receiver is replaced by an MFE sender/receiver, which can act in both directions during any single call. Pulsed signals, which are used in R2 MFC Signaling to indicate a message being initiated from the CO which normally replies, are no longer necessary with the new MFE card. The sequence of messages sent to and received from the CO is transparent to the ISDN BRI terminal. Multiple Appearance Directory Number Multiple ISDN BRI terminals on the same DSL can have the same DN. An ISDN BRI and a non-ISDN BRI terminal cannot have the same DN. Nortel Communication Server 1000 ISDN Basic Rate Interface Feature Fundamentals NN43001-580 01.02 Standard Release 5.0 20 June 2007 Copyright © 2003-2007, Nortel Networks .
