OnSite NTU overview
16
OnSite 2701A/I E1/T1 Ethernet Bridge (NTU) User Manual
1
• General information
•
Ethernet connector
•
MDI-X switch
•
WAN port (T1/E1)
Power connector
AC universal power supply.
The OnSite device offers internal or external AC power supply options.
•
The internal power supply connects to an AC source via an IEC-320 connector (100–240 VAC, 200 mA,
50/60 Hz)
•
The external power supply connects to an external source pro5 VDC via a barrel-type connector
48 VDC power supply.
•
The DC power supply connects to a DC source via a terminal block
•
Rated voltage and current: 36–60 VDC, 400 mA
Ethernet port (outlined in green)
Shielded RJ-45 10Base-T/100Base-TX Ethernet port using pins 1, 2, 3, and 6. See MDI-X switch for hub or
transceiver configuration.The following table defines conditions that occur when the MDI-X switch is in the
out position.
MDI-X
The MDI-X push switch operates as follows:
•
When in the default “out” position, the Ethernet circuitry takes on a straight-through MDI configuration
and functions as a transceiver. It will connect directly to a hub.
•
When in the “in” position, the Ethernet circuitry is configured in cross-over MDI-X mode so that a
straight-through cable can connect The OnSite device’s Ethernet port directly to a PC’s NIC card.
Connect the equipment to a 36–60 VDC source that is electri-
cally isolated from the AC source. The 36–60 VDC source is to
be reliably connected to earth.
Pin No. Signal Direction Signal Name
1
Output
TX+
2
Output
TX-
3
Input
RX+
4
—
—
5
—
—
6
Input
RX-
7
—
—
8
—
—
CAUTION
