2.5 Types of 2N® BRI Enterprise Connection

This subsection deals with the types of connection of the 2N® BRI Enterprise gateway to the main ISDN BRI extension.

ISDN TE – 2N® BRI Enterprise Connection

The connection type shown in the figure below provides communication via a GSM/UMTS gateway without PSTN connection. The ISDN telephone sets are connected to the NT port of the GSM gateway, while a mains adapter simulating power supply from the PSTN is connected to the TE port. The adapter is available under Part No. 5020002.

2N® BRI Enterprise Point-to-Point Connection

This type of connection is especially suitable for direct calls from an ISDN branch network to a GSM/UMTS network.


Another possible connection type is NT, where gateway synchronisation is derived from the PSTN BRI extension.


With multiple GSM gateways, the connection lay-out is as follows:

2N® BRI Enterprise Connection as DialThru Router

This type of connection saves one BRI port to the PBX. Incoming PSTN calls are treated by the GSM/UMTS gateway in the DialThru mode while outgoing calls are routed according to the LCR table.

The figure below shows the gateway as a DialThru router for the Point-to-Multipoint extension. Calls are routed automatically into GSM, UMTS or ISDN based on the internal LCR rules.