ATL Telecom OM25 - Manual (Page 14)

ATL User Guide
OM25 O
Optical M Modem
14
4. INSTALLATION
This chapter describes the basic steps that are required to set up a system using the OM25 Optical
modem.
It is recommended that if two desktop units are to be connected they should be tested back to
back to check for operation before deployment.
Choose a cool, dry location away from direct sunlight. A cold, air conditioned room will give
maximum service life.
4.1 PROTECTIVE EARTH
If a G.703 port needs to be connected to a circuit that is defined as TNV, then a protective earth
must be connected to the earth bond stud on the rear panel. See the Safety Statements at the
front of this User Guide.
4.2 POWER ON SEQUENCE
The power up sequence will begin after power is applied.
Desktop units require a -48V dc or 110/230V ac input (depending on the variant).
The unit must be connected to a protective earth using a suitable bonding conductor.
On the desktop unit, there are eight LED’s: Status, Optical, Interface, Master, Test, Local loop, Loop
back and Remote loop. When power is applied to the unit, the front panel LED’s are illuminated
as follows;
1. Test LED will illuminate for around 5 seconds.
2. Test LED extinguished, Status and Optical LED’s should then be illuminated. The Master LED may
be illuminated if the unit is set to master. Plus the Interface LED may be illuminated if 1’s are
present.
The unit will then be in a ready state for customer configuration.