GE D90 Plus Instruction Manual page 76

ELECTRICAL INSTALLATION
66
Plus
The UR -series C37.94 communication module can be connected to the electrical
interface (G.703, RS422, or X.21) of a non-compliant digital multiplexer via an optical-to-
electrical interface converter that supports the IEEE C37.94 standard, as shown below.
Figure 38: IEEE C37.94 connection to non-compliant digital multiplexer
The setting is used to set the protocol and clock option for the IEEE
Protocol Encoding
C37.94 protocol selection. If the setting is programmed as "C37.94 Internal Clock", then the
system clock is generated internally. For an external or loop timing scheme, the system
clock is derived from the received line signal. For these cases, the program the setting to
"C37.94 External Clock" or "Default" for connection to higher-order systems.
Plus
The UR -series direct fiber module can be connected directly to another UR
UR-series device with an installed direct fiber module.
Figure 39: Direct fiber to direct fiber connection
PLUS
D90 LINE DISTANCE PROTECTION SYSTEM – INSTRUCTION MANUAL
CHAPTER 3: INSTALLATION
Plus
-series or