TELES CellX 3G-4, System Manual

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1 Overview
Page 10 CELLX box 17.1/002
1.2.1 CELLX Box last mile
The CELLX Box provides voice via the mobile network, which offers a reliable alternative to
traditional landline connections for voice connections. In rural areas with no landline avail-
able, all you need for immediate communication is an CELLX Box and mobile network cover-
age. The CELLX Box works as a gateway to the mobile interface for voice.
Figure 1.1 The CELLX Box in a last mile scenario
1.2.2 CELLX Box failover
The CELLX Box is used if the primary VoIP connection fails, in which case it routes outgoing
calls automatically via mobile networks. In this case the CELLX Box works as an mobile gate-
way that can augment landline connectivity with wireless connectivity to the mobile network.
In case of landline connectivity failure, the CELLX Box provides a backup solution to maintain
voice communications. The CELLX Box will route all outbound calls to the mobile network.
Inbound calls from the mobile network will be routed to the connected telephone equipment.
Figure 1.2 The CELLX Box in a failover scenario
PSTN
local network
mobile
network
CELLX
PSTN
local network
mobile
network
CELLX
VoIP
x