Symmetricom Time Server user manual Serial Access, Pin 25-pin

Chapter 3: Remote Operation Serial Access

3.3Serial Access

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 3-1below describes the Utility Port’s RS-232 pinouts and signal levels.

Serial time output is not available on the Utility Port.

Table 3-1: RS-232 Pinouts and Signal Levels

TimeVault	9- to 25- PIN ADAPTER CABLE		SIGNAL DESCRIPTION
	9-pin	25-pin
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

3.3.1Serial Line Settings

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

Data Rates:	9600 bits/second
Word Length:	8 bits
Parity:	None
Stop Bits:	1

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).

These examples apply only to systems using Windows 95/98/NT. Check with your System Administrator if you are using a different operating system (such as Macintosh or UNIX).

3-42 TimeVault™ User’s Manual 6000-100Ch3.fm Rev. D