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8 Chapter 2 - Getting Started
The MicroRouter 2250R secondary port is an RS-232 sync/async inter-
face. The RS-232 interface is capable of communicating to another
router or a PPP client machine over a modem, 56K CSU/DSU, or ISDN
Terminal Adapter.
RS-232 Interface
The MicroRouter 2250R includes one DB-25 to DB-25 RS-232
sync/async cable. This cable supports RS-232 asynchronous modems,
synchronous leased and switched 56K CSU/DSU’s, and ISDN Terminal
Adapters. It can also be used to connect the router’s auxiliary interface
to a PC running terminal emulation software, or to a dumb terminal.
Note: Please use only the supplied DB-25 cable when connecting
your line communication device to the MicroRouter 2250R’s RS-232
interface. The cables provided with other equipment will generally not
have the same internal connections.