Chapter 2. Installation

Set Control Port

The ESU 120e can be configured from the control port when T- Watch PRO, SNMP, or the terminal interface are being used.

If the control port is to be used, the control port baud rate must also be selected.

Chain In (PC)

The unit can be controlled from an external PC connected directly or via modem to the chain-in port. when using chain-in, the selec- tion of the control port baud rate from 9600 (factory default), 1200, 2400, or 4800, or 38400 must be made using the Unit Configuration menu. See Unit Menu on page 5-11 for details.

Unless locked out externally, the front panel can also control the unit.

Chain In/ Chain Out

ESU 120e units and other ESUs can be linked together to form a chain. Figure 2-4 shows an example of a chain-in arrangement with a PC or a modem. The first ESU 120e in the chain receives control- ling input from the PC or modem.

PC or Modem

Control Chain

Input Out

ESU 120e

Chain Chain

In Out

ESU 120e

Chain Chain

In Out

ESU 120e

Figure 2-3. Example of Chain In

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ESU 120e User Manual

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ADTRAN ESU 120e user manual Set Control Port, Chain In PC, Chain In/ Chain Out