Unit installation

Chapter 2 Installation and Setup Installation and Operation Manual
2-8 Setting the Internal Jumpers and Switches FCD-E1
Table 2-1. Main Link Jumper and Switch Settings
Function Jumper or
Switch
Description Values (Default value in bold)
Main Link Interface Board Settings
Ground
JP8 The jumper FGND=SGND
controls the connection
between the FCD-E1 signal
ground and the frame (chassis)
ground.
YES – Signal ground is connected
to frame (chassis) ground.
NO – Signal ground is not
connected to the frame ground.
JP6, JP8 and
switch S1 (2)
Jumpers JP6, JP8 and switch S1
(2) designated for BAL/UNBAL
on the E1-DSU interface are
used to select the main link
interface. All the jumpers
must always be set to the
same position.
Balanced Interface - Set all the
jumpers to BAL.
Unbalanced Interface - Set the
jumpers to UNBAL (UNB)
Balanced /
Unbalanced
Interface
JP3, JP5, JP7,
and switch S1
(2)
Jumpers JP3, JP5, JP7,and
switch S1 (2) designated for
BAL/UNBAL on the E1-DSU
interface are used to select the
main link interface. All the
jumpers must always be set
to the same position.
Balanced Interface - Set all the
jumpers to BAL.
Unbalanced Interface - Set the
jumpers to UNBAL (UNB).
Transmit Side
Ground Reference
TXGND S3
(1)
The TXGND jumper is used to
control the ground reference
of the main link transmit
output when the unbalanced
interface is used.
YES – Transmit ground reference
is connected to frame (chassis)
ground.
NO – Transmit ground reference
is not connected to the frame
ground. (Balanced interface)
In accordance with ITU-T
recommendations, the jumper
should be set at YES when the
unbalanced interface is used.