Serial and LAN Interfaces
Introduction to Netlink Frame Relay Access Devices
Frame Relay Module
Cable to
Ethernet Module
Figure 1-7 Frame Relay Module with I/O Boxes and Cabling
As shown in the figure, each 60-pin serial connector on the FRM supports up to four
I/O ports, all of the same interface type. A cable carries each connector's signals to an
I/O box assembly. The I/O box acts as a "splitter" that carries signals to four 25-pin
connectors. The "final" physical interface depends on the combination of the type of
60-pin serial port and the I/O cable exiting the I/O box.
Port Type
V.35
RS-232
RS-422
I/O Box
I/O Cables
I/O Cable Types
V.35 DTE
V.35 DCE
RS-232 DTE
RS-232 DCE
RS-449 DTE
RS-449 DCE*
1-13
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