15
4.0 INSTALLATION
The Model 2711 is equipped with a DTE, network, and power
interface. This section briefly describes connection to each.
4.1 DTE INTERFACE CONNECTION
The DTE interface is a V.35 DCE presented as an M/34 male con-
nector. This interface is designed to plug directly into a DTE interface
(See Appendix D for V.35 interface pin assignments).
4.2 NETWORK INTERFACE CONNECTION
The Network Line Interface is an eight position keyed modular jack
configured as a RJ-48C. This interface will need to be configured to
match the line parameters (i.e. framing, line coding) supplied by the
Central Office.
NOTE: If the Model 2711 Series is being used for private short
range modem applications, the twisted pair cable connected to its
port will need to be a cross-over cable. See Appendix D for
Interface pin assignments.
4.3 POWER CONNECTION
The Model 2711 Series is powered via a supplied external trans-
former and is factory configured for either 120VAC or 100-240VAC
operation. This connection is via the barrel jack on the rear of the
2711. The Model 2711 can also be powered via the DTE interface
when supplied with +5VDC @ 300mA to Pin KK. See Appendix D for
more information.
DC Power Supply
The 36-60 VDC DC to DC adapter is supplied with the DC version
of the Model 2711. The black and red leads plug into a DC source
(nominal 48VDC) and the barrel power connector plugs into the barrel
power supply jack on the 2711.
16
5.0 OPERATION
Once the Model 2711 is installed and configured properly it is
ready to place into operation. This section describes the function of
the LED indicators, the use of the loopback test modes and the control
port.
5.1 LED DESCRIPTIONS
The Model 2711 Series is equipped with seven LED indicators that
monitor the status of communication. Figure 3 (below) shows the loca-
tion of the LEDs on the Model 2711 Series front panel.
TXD
(Transmit Data) glows green to indicate
data flow to Model 2711 from the DTE.
RXD
(Receive Data) glows green to indicate data
flow from the Model 2711 to DTE.
LOS
(Loss of Sync) glows red to indicate a net-
work Loss of Frame or Loss of Signal condi-
tion.
RXD
LOS
ALM
ERR
T/L
PWR
TXD
Model 2711
Figure 3. Top of Model 2711, Showing LED Indicators
To Power
Supply Jack
To -48VDC
Source
-Vin
+Vin
SWITCHING POWER SUPPL
Y
MODEL
: SYD1
106-0505
INPUT
: 36-60V 0.2A
MAX
OUTPUT
: +5V 1.0A
OUTPUT
POWER : 5W MAX
S/N
: G01234567890
MADE IN CHINA
BY
SUNNY
Black lead (-V)
Red lead (+V)
Barrel power connector
