Military Unit Uses Mobile VoIP Virtual PBX Network
A military tactical Battle Group needed to extend its
Defense Switched Network* (DSN) phone service between
a Central Command Center (CCC) and 17 adjacent
communications sites located in trailers in the field. The
proposed system had three main requirements:
- Rugged, Industrial Grade hardware system to counter
the effects of potential harsh environments and
potential damage from moving network equipment
over rough terrain.
- Self-contained VoIP network with Internal PBX (rather
than external SIP Server) for maximum security
- Meet stringent Director of Information Management
(DOIM) design and accreditation requirements for an
analog-to-analog (POTS) solution
The Battle Group looked
at a couple different VoIP
solutions before deciding
on the JumboSwitch from
TC Communications. In
particular, the Battle Group
liked that the JumboSwitch
was scalable for network
expansion, provided a self-contained phone system and
was available in an industrial hardened version.
With the JumboSwitch, the local telephone system
(including the trailers) was highly mobile. With minimum
notice, it could be picked up and transported to another
base and easily connected to the existing “core” network
at the new location.
Security was also an important issue. Because the
JumboSwitch’s virtual PBX function did not require a
central hub or SIP server, it provided secure and reliable
telephone service on the Battle Group’s existing LAN.
Moreover, it provided all popular call processing features
and enabled all connections between any FXS-FXS and FXS
FXO network channel.
Specifically, the Battle Group installed seven Model TC3848
4-port Virtual PBX interface cards in a 4U chassis at the CCC
and single cards in a 1S chassis in the field trailers. This
topology allowed up to 35 FXO connections to the DSN
over the existing network LAN via 10/100Base-T links.
One trailer required eight phone lines. This required
connecting two 1S versions together via a RJ45 connector
on the front panel to the LAN and to the other 1S unit via
a RJ45 connector on the back panel.