Eaton POWERWARE 9315 Instruction Manual Page 126

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144
EATON Powerware 9315 Parallel Capacity/Redundant System
164201150 Rev. E www.powerware.com
14.3.3 Housekeeping
When the modem is idle, the SBM pings" (tests for connection) the modem by
sending an AT" to the modem at five-minute intervals. If the modem does not
respond correctly, by sending either OK" or 0" to the SBM, the SBM attempts to
re-initialize the modem. After a successful re-initialization, the SBM returns to the
Housekeeping function. If the re-initialization is unsuccessful, two more attempts to
re-initialize the modem are made before the SBM disables all Call Out attempts.
Re-initialization is then attempted every ten minutes or until the communications
mode is changed by the SBM front panel controls (or the modem is successfully
re-initialized). For each unsuccessful attempt, the SBM logs a modem failure event
into the event log. When the modem link is confirmed, the SBM communications
resume normal operation and Call Out is enabled.
14.4 Hardware Requirements
The following hardware components are required to connect the Remote
Notification function.
Modem: Basic external PC modem supporting the following AT commands.
T Tone dialing.
&F Load factory defaults.
E0 Do not echo characters in command state.
N0 Handshake only at speed specified by S37.
Q0 Return result codes in both originate and answer mode.
V0 Display result codes as numbers.
X0 Provide basic result codes: CONNECT, NO CARRIER, and RING.
&D0 Ignore status of DTR signal.
&K0 Disable local flow control.
&Q5 Communicate in error control mode.
S0=1 Auto Answering.
S37=6− 2400 Baud.
V0 Store setup in profile O.
Y0 Recall profile O on power up.
NOTE: Consult the modem manufacturer’s manual to confirm that the above
commands are supported by your modem.
Standard serial cable with a male DB25 connector on both ends.
DB25 null modem adapter.
All the above items can be acquired at your local computer products supply store.
An alternative to purchasing a cable is to build your own serial cable using the
following pin out description:
Male DB25 Male DB25
pin 7 pin 7
pin 2 pin 2
pin 3 pin 2
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