qualified name or IP address of the host (NIS server) and the port (optional) is the port to use to contact the server.

If you specified UPSTYPE snmp, then the device name becomes hostname:vendor:community. Please see the SNMP chapter (see Support for SNMP UPSes) in this manual for more details.

LOCKFILE <path to lockfile> This option tells apcupsd where to create a lockfile for the USB or serial port in the specified directory. This is important to keep two programs from reading or writing the port at the same time. Please note that although the directive name is LOCKFILE, you are actually specifying the lock file path. apcupsd au- tomatically appends the name of the device when creating the file. On most systems, this directive is automatically set by the ./configure program. You may also explicitly set it during the build process by using the --with-lock-dir= option of the ./configure program.

Configuration Directives Used by the Network Information Server

None of these directives are required for proper operation of apcupsd. For the Network Information Server to work, it must be enabled in the configu- ration (default) with --enable-nis

NETSERVER [on — off] This configuration directive turns the net- work information server on or off. If it is on, apcupsd will spawn a child process that serves STATUS and EVENTS information over the network. This information is currently used by the Web-based CGI programs. The default is on. In some cases, for added security, you may want to invoke a separate information server daemon from the inetd daemon. In that case, NETSERVER should be off.

NISIP <IP-address> This directive specifies an IP address on which NIS server will listen for incoming connections. Default value is 0.0.0.0 that means any incoming request will be serviced but if you want it to listen to a single subnet you can set it up to that subnet address, for example 192.168.10.0. Additionally you can listen for a single IP like 192.168.10.1. You may also use the --with-nisip= option of the

./configure program to set this directive during the build.

This directive does not work on Win32 machines because inet ipton() is not implemented there.

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APC UPS control system manual

UPS control system specifications

APC UPS (Uninterruptible Power Supply) control systems are vital components for ensuring uninterrupted power supply and protecting critical equipment from power interruptions, surges, or fluctuations. Designed by Schneider Electric, APC UPS systems are renowned for their high quality and reliability. They utilize advanced technologies and features to suit diverse applications, from home offices to large industrial settings.

One of the main features of APC UPS systems is the ability to provide backup power during outages. This is achieved through a battery system that activates immediately when the mains power fails. This seamless transition minimizes downtime and ensures that electronic devices continue to operate, protecting data integrity and equipment lifespan.

Another significant characteristic of APC UPS systems is their intelligent management capabilities. Most models come with PowerChute software, which provides users with real-time monitoring of power conditions and the status of the UPS. This software allows for graceful shutdowns of connected devices during extended outages, thereby preventing data loss and damage to devices.

APC UPS systems also incorporate advanced technologies such as Automatic Voltage Regulation (AVR). AVR technology ensures that the output voltage remains stable by correcting minor fluctuations without switching to battery mode. This not only prolongs the battery life but also provides a consistent power supply to the connected equipment.

Thermal management is another critical aspect of APC UPS control systems. The design often includes efficient cooling systems that prevent overheating, ensuring optimal performance and longevity of the unit. Some models feature EcoMode, which reduces energy consumption and lowers operational costs by working at high efficiency only when battery backup is not required.

APC UPS systems are designed with scalability in mind. Users can easily add more batteries or connect additional UPS units to accommodate growing power needs. Features such as hot-swappable batteries and modular design facilitate easy upgrades and servicing without interrupting power supply.

In terms of connectivity, APC UPS products often feature multiple options including USB, RS-232, and network management capabilities. This enables users to connect remote management tools and integrate the UPS with existing IT infrastructure.

In summary, APC UPS control systems deliver reliability, efficiency, and advanced technology features that cater to a wide array of power protection needs, making them a trusted choice for individuals and businesses alike.