Symmetricom Time Server Manual Do Utilizador

Chapter 3: Remote Operation

The RS-232 connector provides serial access.  The RS-232 connector is located between 
the NET Port and the front panel display (see Figure 1-1 on page 1-7).  This connector is 
labeled “Serial I/O”, and is referred to as the “Utility Port.”  Table 3-1 below describes the 
Utility Port’s RS-232 pinouts and signal levels.

Serial I/O settings are factory set and cannot be changed.  The default serial format is:

The Utility Port can be connected either to a terminal or to a computer, using a null 
modem cable, and used in conjunction with any serial access (terminal emulation) 
software program, such as Procomm or HyperTerminal.  The following section illustrates 
a terminal connection, using HyperTerminal, a popular Windows-based application.  All 
commands are input using conventional F-series type commands (see “Command List” on 
page 4-51).

OPEN

1                                        8

DCD, CARRIER DETECT

IN RXD

2– – – – – – <– – – – – – –3

TRANSMITTED DATA

OUT TXD

3– – – – – – >– – – – – – –2

RECEIVED DATA

OPEN

4                                       20

DTR, DATA TERMINAL READY

GND

5– – – – – – <>– – – – – – 7

SC, SIGNAL GROUND

OPEN

6                                        6

DSR, DATA SET READY

OPEN

7                                        4

RTS, REQUEST TO SEND

OPEN

8                                        5

CTS, CLEAR TO SEND

OPEN

 9                                       22

RI, RING INDICATOR