35
36
5.0 OPERATION
Once the Model 2710A is installed and configured properly it is
ready to place into operation. This section describes the function of
the LED indicators, and the use of the loopback and pattern test
modes.
5.1 LED DESCRIPTIONS
The Model 2710A is equipped with seven LED indicators that moni-
tor the status of communication. Figure 4 (below) shows the location
of the LEDs on the Model 2710A Series front panel.
TXD
When the unit sends a one, the TXD LED is turned on.
When it sends a zero, the TXD LED is turned off.
Moreover, the TXD LED is active only in active DS0
channels. In inactive channels, the TXD LED is off.
RXD
When the unit receives a one, the RXD LED is turned on.
When it receives a zero, the RXD LED is turned off.
Moreover, the RXD LED is active only in active DS0
channels. In inactive channels, the RXD LED is off.
LOS
The Loss of Sync LED lights when the unit loses syn-
chronization with the incoming signal. This may happen
when there is a framing mismatch or a loss of signal. In
unframed mode, the LOS LED monitors the status of the
transmit clock.
4.3 POWER CONNECTION
The Model 2710A offers three ways to supply external power: AC
power, DC power and interface power.
4.3.1 Using the AC Power Supply (120VAC or 100-240VAC)
The Model 2710A uses a 5VDC, 300mA 120VAC wallmount power
supply or a universal input 100-240VAC, power supply. The universal
input power supply is equipped with a male IEC-320 power entry con-
nector. Either power supply connects to the Model 2710A by means of
a barrel jack on the rear panel. There are a variety of international
power cords available for the universal power supply. The Model
2710A powers up as soon as it is plugged into an AC outlet–there is no
power switch.
4.3.2 Supplying DC Power
The 36-60 VDC DC to DC adapter is supplied with the DC version
of the Model 2710A. 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 2710A.
4.3.3 Supplying Power via pin KK
You may also supply DC power directly to pin KK of the V.35 inter-
face. DC Power supplied to pin KK must be 5VDC ± 5%, 300mA mini-
mum.
NOTE: Model 2710A is factory configured to accept power from
the enclosed DC wall adapter (See Sections 4.3.1 and 4.3.2
above). If you wish to supply power via pin KK on the interface,
you must change the setting of the
power supply jumper on the
printed circuit board See Appendix E. All power sources must
be SELV (Circuit, Safety Extra Low Voltage) specified. (See CEN-
ELEC EN60950, Section 1.2.8.5)
Figure 4. Top of Model Patton Electronics, Showing LED Indicators
2710A
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
