2N BRI Lite/Enterprise v1.1 - Manual (Page 39)

Types of 2N® BRI Enterprise Connection
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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.