Console terminal (an ASCII terminal or a PC running HyperTerminal or similar terminal emulation software)
configured for 9600 baud, 8 data bits, 1 stop bit, no flow control, and no parity.
Data service unit (DSU) or channel service unit/data service unit (CSU/DSU) as appropriate for serial interfaces.
External CSU for any CT1/PRI modules without a built-in CSU.
Cisco Catalyst IR8340 Rugged Series Router Hardware Installation Guide
21
Preparing for Router Installation
Required Tools and Equipment for Installation and Maintenance