2.0 GENERAL INFORMATION
Thank you for your purchase of this Patton Electronics product.
This product has been thoroughly inspected by Patton’s qualified tech-
nicians. If any questions or problems arise during installation or use of
this product, please do not hesitate to contact Patton Electronics
Technical Support at (301) 975-1007.
2.1 FEATURES
• Synchronous network data rate of 2.048 Mbps
• Four Selectable DTE Rates: 256, 512, 1024, and 2048 Mbps
• EIA-530 (V.36/EIA-422 Electrical), V.35 or X.21 terminal interfaces
•120 ohm (twisted pair) or 75 ohm (coax) network terminations
• Master and Slave (network) clocking
• Built-in local loopback test
• Front panel LED indicators for power, network,
master clock and test loop
• Mounts in Patton’s 16-slot rack chassis and 2/4/8-slot Cluster
Boxes
• Made in the U.S.A.
2.2 DESCRIPTION
The Patton
MegaLink™ Model 2703RC G.703/E1rack card modem
receives unstructured, synchronous 2.048 Mbps data from a G.703 net-
work and sends it to a router, bridge, multiplexer or other device. The
Model 2703RC is available with two interface options: 120 Ohm twisted
pair to the network with EIA-530 (V.36/EIA-422) or V.35 (utilizing a 25
pin connector) to the terminal, or 75 Ohm dual coax to the network with
X.21 to the terminal. An additional feature allows the EIA-530 terminal
interface to be adapted to X.21 using a special DTE cable (available
from Patton).
The Model 2703RC is designed to mount in Patton’s 2U high, 16-
slot rack chassis or 2/4/8-slot Cluster Boxes. These have a switchable
120/240 VAC power supply (optional 48 VDC) and mount cards in a
mid-plane architecture: front “function” cards and rear “interface” cards
can be hot-swapped independently, providing great flexibility. The
Model 2703RC supports Internal (master) and Network (slave) clock-
ing. Loopback test is built-in, and front panel LEDs monitor power, net-
work, master clock and test loop.
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3.0 CONFIGURATION
Two cards make up a single Model 2703RC G.703 Converter - a
front function card and a rear interface card. Each may require config-
uration depending upon the product application. This section describes
the location and orientation of the Model 2703RC’s configuration
switches and jumpers, and provides descriptions for all settings.
3.1 FRONT CARD CONFIGURATION
The Model 2703RC front card has a single bank of eight DIP
switches located on the top of the printed circuit board. Figure 1,
below, shows the position of the switches on the board.
Changing the DIP Switch Settings
Figure 2 shows the orientation of the DIP switches with respect to the
“ON” and “OFF” positions.
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Figure 1. Model 2703RC board, showing jumper locations
DIP Switch
OFF
ON
1
8
Figure 2. Close up of the configuration switches
NOTE: The OFF position is oriented toward the front of the Model 2703RC.
OFF
ON
Front Panel
