Unit installation

Installation and Operation Manual Chapter 2 Installation and Setup
FCD-E1 Setting the Internal Jumpers and Switches 2-13
Table 2-2. Sublink Jumper and Switch Settings
Function Jumper or
Switch
Description Values (Default value in bold)
Sublink Interface Board Settings
Sublink Interface
Selection Jumpers
JP33, JP35,
and S2 (1)
The jumpers JP33, JP35, and
S2 (1), designated
BAL/UNBAL, are used to
select the sublink interface.
All the jumpers must always
be set to the same position.
Balanced Interface – Set
jumpers JP33 and JP35 to BAL
and set the switch S2 (1) to BAL.
Unbalanced Interface – Set
jumpers JP33, JP35 and switch
S2(1) to UNBAL.
Sublink Transmit –
Ground Reference
Switch
TXGND S2
(2)
The TXGND switch is used to
control ground reference of
the sublink transmit output
when the unbalanced
interface is used.
In accordance with ITU-T
recommendations, the switch
should be installed when the
unbalanced interface is used.
Switch not installed (for
Balanced Interface)
Sublink Receive –
Ground Reference
Switch
RXGND S2
(4)
The RXGND switch is used
to control ground reference
of the sublink receive input
when the unbalanced
interface is used.
In accordance with ITU-T
recommendations, this
jumper should be set to YES
when the unbalanced
interface is used.
NO (for Balanced Interface)
The interface board has protection fuses (F1 to F4) for the surge protection circuits
located on the line side of the line isolation transformers. These fuses are also
identified in Figure 2-8.
Reinstalling the FCD-E1 Cover
After completing the internal settings, reinstall the top cover.

To reinstall the FCD-E1 top cover:
1. Position the lower half of the FCD-E1 case on a flat, clean surface.
2. Check that the decorative black plastic strips on the sides on the unit are still in
place (if not, place the strips in the grooves on the sides of the lower half).
Not
e