2N BRI Lite/Enterprise v1.2 - Manual (Page 29)

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2N TELEKOMUNIKACE a.s., www.2n.cz
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With multiple GSM gateways, the connection lay–out is as follows:
2N BRI Enterprise Connection as DialThru Router
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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.