UTMC OTU/MOVA Handbook
667/HB/31601/000
Page 17
Issue 5
2.8 THE MODEM UNIT
The options available are: a DSL modem, a lease line modem or UMTS router
2.8.1 The DSL Modem Unit
The DSL modem is an OEM unit for DSL communications over a single pair of copper
wires. The type of DSL modem may vary depending on customer requirements.
a. Data speeds from 272 Kb/s to 2320 Kb/s
b. Ethernet Interface – RJ45 Connection
c. Line Interface – RJ45 Connection
d. On line status indicators
Due to its size, it is not possible to mount this modem onto the back of the Gemini
2
PSU. During installation of the Outstation a suitable place should be found within the
cabinet.
2.8.2 The Lease Line Modem Unit
The lease line modem is an OEM unit for V34 communications over a two-wire point-to-
point lease line.
a. Data speed 19.2 Kb/s using V34 transmission
b. Outstation Interface: 25-Way D-Type Connection
c. Line Interface: 2-wire Connection
d. Line status and data indicators
e. Powered by 12V DC from the CPU card.
Due to its small size, the modem can be mounted onto the back of the Gemini
2
PSU.
See section 4.2.2 for connection instructions. See ref 1.3.4 for instation setup.
2.8.3 UMTS (3G) Mobile Router
An option is available to connect the OTU back to the instation via a UMTS mobile
communication network. Viability of this option will depend on the outstation location,
mobile network signal strength and service provider. In considering this option the 3G
OTU Communications Site Selection Guide (667-AY-45025-002) should first be
consulted.
The UMTS router is an OEM unit for communications over a UMTS mobile network.
There are currently two devices approved for installation, the Digi Connect WAN 3G
and InHand IR711 units. For further information see the respective third party approval
documents – 667-AY-46472-000 and 667-AY-46471-000.
a. Data speeds – dependent on connection but from 171Kbps to > 7Mbps
b. Ethernet Interface – RJ45 Connection
c. Line Interface – mobile network air interface
d. On line status indicators