Powerware 9315s manual Hardware Requirements, Housekeeping

14.3.3Housekeeping

When the modem is idle, the SSBM “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 SSBM, the SSBM attempts to re-initialize the modem. After a successful re-initialization, the SSBM returns to the Housekeeping function. If the re-initialization is unsuccessful, two more attempts to re-initialize the modem are made before the SSBM disables all Call Out attempts. Re-initialization is then attempted every ten minutes or until the communications mode is changed by the SSBM front panel controls (or the modem is successfully re-initialized). For each unsuccessful attempt, the SSBM logs a modem failure event into the event log. When the modem link is confirmed, the SSBM communications resume normal operation and Call Out is enabled.

14.4Hardware 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

14--4	Powerware 9315 Parallel Capacity/Redundant System with PHP SSBM
	164201373 Rev. A 092402