Black Box MT1100A, Руководство пользователя

Страница: 12 / 26

Chapter 2 Installation and Setup
2-4 Configuring Standalone Unit
Table 2-1. Jumper Settings, E1 Converter
Jumper Description Values Default Setting
JP1, JP2, JP3, JP4,
JP6
Select the E1 interface type BAL – Balanced interface
(RJ-45 connector)
BNC – Unbalanced interface (BNC
coax connectors)
BAL
TX & RX CODE,
JP9 Selects the transmit and
receive coding AMI – Jumper plug is installed
HDB3 – Jumper plug is not installed
HDB3
TIMING, J4 Selects the clock reference RCV (pin 4) – Receive clock
EXT (pin 5) – External clock
INT (pin 6) – Internal clock
RCV
ANA LOOP, JP11 Controls the local analog
loopback activation
LOC – Activates the local analog
loopback
DTE – Allows the activation of the
local analog loopback via DTE
DTE
Table 2-2. Jumper Settings, T1 Converter
Jumper Description Values Default Setting
TX & RX
CODE,
JP9 & JP7
Selects the transmit and
receive coding AMI – Jumper plug is installed
B8ZS – Jumper plug is not installed
B8ZS
TIMING, J4 Selects the clock
reference RCV (pin 4) – Receive clock
EXT (pin 5) – External clock
INT (pin 6) – Internal clock
RCV
ANA LOOP,
JP11 Controls the local
analog loopback
activation
LOC – Activates the local analog loopback
DTE – Allows the activation of the local
analog loopback via DTE
DTE
Selecting the E1 Impedance
When using the balanced interface:
•
Terminate the impedance of G.703 link to 120
Ω
.
• Use only the RJ-45 connector to transmit full duplex data to the G.703
network over UTP or STP cable.
When using the unbalanced interface:
• Terminate the impedance of G.703 link to 75 Ω .
• Use only the coaxial BNC connectors to transmit to the G.703 network via two
coaxial cables.