INSTALLATION MANUAL
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7.7.2
Voxell LCR used for SOHO
Connection similar to the previous one, but used at home or in a (very) small office.
Since there is no PBX, the FXO connector of the TOPEX LCR box is connected directly to the
outgoing line of the PSTN. The obvious application is least cost routing of the outgoing calls – if
they are for the mobile network where your SIM is registered, they will go out via the GSM
module, while the other calls will be directed to the public telephony network (PSTN).
But you can also use Voxell LCR to cut down mobile costs! You are out in the field and you
call from your cell phone the number of the SIM card used in Voxell LCR . The equipment answers,
and provides you with DISA tone. Now you can dial in your PSTN destination!
This works fine when interconnection fees are high, so the cost of a mobile to mobile call
plus the cost of the PSTN-to-PSTN call comes less than the cost of a mobile to PSTN call.
7.7.3
Voxell LCR connected on its FXS interface with PABX and with the FXO interface
with the PSTN.
This is especially useful when you have a phone exchange with a small number of trunks
(outgoing lines) available. You don’t want to “waste” a trunk only for Voxell LCR ! So you can
insert the Topex equipment between the PBX and the public telephony network. Voxell LCR is
connected through FXO interface directly to the public telephony network, and with its FXS to the
PBX.
This way, the Voxell LCR unit is inserted transparently between the PBX and the public
network...
Incoming to PABX
The calls from the public telephony network are transferred transparently towards the PABX.
The calls coming in from the 2G/3G networks are analyzed by checking the identity in the CLIP-
GSM table.
If the ID is missing or the caller is not found in the CLIP-GSM records, routing will be
performed by Voxell LCR according to the settings of the GSM module.
The incoming calls from the mobile network can be routed either through DISA or with help
of a human operator, which answers the extension” Target”.
7.7.4
Voxell LCR connected on its FXS interface with a FXO junction of PABX and with its
FXO interface to a local subscriber interface of the same PABX.
In this configuration, both ports of the Topex equipment are used for connection to the
private branch exchange. This allows “fine tuning” of the routing of calls according to their ID, if
your PBX does not perform this. The Clip List of Voxell LCR can store up to 50 records, defining
advanced routing options according to the ID of the caller.