OnSite NTU overview
15
OnSite 2701A/I E1/T1 Ethernet Bridge (NTU) User Manual
1
• General information
The status LEDs from left to right are (see
for LED descriptions):
•
Power
•
E1/T1 TD, RD, CTS, and DTR
•
Ethernet Link, 100M, Tx, and Rx
Console port
Located on the front panel, the unshielded RJ-45 RS-232 console DCE port (EIA-561) with the pin-out listed
in the following table:
Rear panel connectors and switches
On the rear panel from left to right are the following:
•
Power input connector
Table 2. Status LED descriptions
Power
Green
ON indicates that power is applied. Off indicates
that no power is applied.
T1/E1
Link
Green
Solid green: connected
Off: disconnected
LOS
Red
On: indicates a T1/E1 loss-of-frame condition. It
also indicates that no T1/E1 signal is detected.
TD
Green
Green: indicates a binary ‘0’ condition
off
: indicates a binary ‘1’or idle condition
RD
Green
Green: indicates a binary ‘0’condition
off: indicates a binary ‘1’ or idle condition
Ethernet
Link
Green
ON: indicates an active 10/100 Base-T connec-
tion
100M
Green
ON: connected to a 100BaseT LAN
Off: connected to a 10BaseT LAN
Tx
Green
Flashing: when transmitting data from the NTU
to the Ethernet
Rx
Green
Flashing: when transmitting data from the Ether-
net to the NTU.
Pin No. Signal Direction Signal Name
1
Out
DSR
2
Out
CD
3
In
DTR
4
—
Signal Ground
5
Out
RD
6
In
TD
7
Out
CTS
8
In
RTS
