Ascii Interface - GE ALPS Instruction Manual

8 LOCAL USER INTERFACE

8.3 ASCII INTERFACE

The pin-to-pin connections for the cable connectIng the ASCII port to plug PL2 on the back of the ALPS are shown in Fig-
ure 8–2: MODEM CABLE. Virtually any standard communications package on a PC with a serial interface may be used.
The ASCII serial interface must be programmed to the same parameters as the remote communications ports. The ASCII
port's handshaking mode must be set to either XON/XOFF or DTR ready. The ALPS setting COMFORT affects both the
baud rate of the RS232 port (plug PL1) and the ASCII port PL2. Figure 8–3: 25-PIN NULL MODEM CABLE shows a Null
modem cable for the 9-pin front port PL-1.
T D
R D
R T S
C T S
D S R
G N D
D C D
D T R
RI
T O
R E L A Y
PL-1 & 2
T D 2
R D 3
R T S 4
C T S 5
D C D 8
D S R 6
RI 22
D T R 20
G N D 7
TO RELAY
PL-2 & 3
The following programs have been tested and known to support the ASCII interface on the ALPS. Note that most any com-
munications package that emulates a TTY type terminal should communicate successfully.
• Procomm Plus (vendor: Datastorm)
• Windows Terminal Program (vendor: Microsoft; included in Windows 3.1/95/98 system)
GE Power Management
2
3
4
5
6
7
8
2 0
2 2
R E M O T E C O M M U N I C A T I O N S M O D E M C A B L E
Figure 8–2: MODEM CABLE
REMOTE COMMUNICATIONS PC DIRECTLY
NULL MODEM CABLE
Figure 8–3: 25-PIN NULL MODEM CABLE
8.3.2 RECOMMENDED REMOTE COMMUNICATIONS PACKAGE
ALPS Advanced Line Protection System
8.3 ASCII INTERFACE
8.3.1 DESCRIPTION
2 T D
3 R D
4 R T S
5 C T S
6 D S R
7 G N D
8 D C D
2 0 D T R
2 2 RI
T O
M O D E M
2 T D
3 R D
4 R T S
5 C T S
8 D C D
6 D S R
22 RI
20 D T R
7 G N D
TO PC
8-23
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