2N BRI Lite/Enterprise v1.1 - Manual (Page 44)

Call Routing Principles 3.2
44
Tip
 2N ® BRI Enterprise / BRI Lite can also route outgoing calls into the
GSM/UMTS networks according to the B-channel used. In that case, the
GSM/UMTS module is paired with a specific B-channel of the ISDN BRI
line.
LCR Table
The LCR (Least Cost Routing) table is the key telephone cost cutting factor. It helps
you set call routing rules according to the CLIP, daytime and day in a week. By
entering state (bank) holidays into the LCR table you achieve even more remarkable
cuts.
To make the prefix-based call routing to external ports and the LCR table work
properly, select the module for the call in the Outgoing destination parameter while
creating the LCR record.
The gateway also allows you to route outgoing GSM calls on the basis of the SIM card
position. Such outgoing calls are not routed according to the GSM provider's number
but through the defined GSM module.
In addition, the ISDN ports can work in the DialThru mode. This means that all calls
are routed to the respective port without any check. Namely, from TE to NT and vice
versa.
Outgoing GSM Call Routing from Internal ISDN
If the GSM/UMTS gateway is connected to a subscriber line of your PBX, you are
advised to enable the DISA function to GSM to make your GSM gateway answer every
call routed to it by the PBX and wait for further dialling to GSM networks.
The GSM/UMTS gateway routes outgoing calls to GSM as follows:
 The calling subscriber dials a user number.
 If the user dialling is evaluated as Access to GSM gateway, the gateway
barred number table is searched through and, if a match is found, the call
setup request is rejected.
 With an outgoing call, the gateway waits for further digits to be dialled. This
timeout results in a certain delay between the subscriber's dialling and the
subsequent dialling by the GSM gateway. Therefore, select the Count of
dialled digits for the called destinations while configuring your gateway.
Then, the gateway initiates the outgoing call processing algorithm on
receiving the last digit
 The dialling prefix is first checked against the prefixes included in the first row
of the LCR table. If no match is found, the following row is used for check and
so on.