for the IM and Presence Service
IM and Presence Service requires 4 GB of RAM, except
for the 500-user and Business Edition 6000 OVA deployments, which require 2 GB
IM and Presence
Service installer checks for the presence of the DVD-ROM drive,
sufficient hard drive and memory sizes, and sufficient CPU type and speed.
IM and Presence Service supports bridge upgrades from
any of the following servers:
bridge upgrade allows you to create a DRS backup on the discontinued hardware.
You can then restore the DRS backup on supported hardware after you complete a
fresh IM and Presence Service installation on the supported hardware. If you
attempt an upgrade on discontinued hardware, a warning appears on the interface
and on the CLI, informing you that
Communications Manager or
IM and Presence
Service supports only the functionality to create a DRS backup on
pre-9.0 Unified Communications Manager or IM and Presence Service runs on a
deprecated server, you can upgrade it by using the Bridge Upgrade procedure.
Uninterruptible Power Source
that you connect each Unified Communications Manager or IM and Presence Service
server to an uninterruptible power supply (UPS) to provide backup power and
protect your system against a power failure.
MCS-781x and MCS-782x servers are not connected to a UPS, they run a higher
risk of file corruption during power outages because any cached data is lost
during a power outage on these servers with drive write cache enabled (and no
internal RAID cache battery backup). To prevent such file system corruption,
you must connect these servers to a UPS.
Communications Manager and IM and Presence Service run on one of the servers
listed in the table below, basic integration to UPS models APC Smart-UPS 1500VA
USB and APC 750VA XL USB is supported.
occurs through a single point-to-point USB connection. Serial and SNMP
connectivity to the UPS is not supported, and the USB connection must be point
to point (in other words, no USB hubs). Single- and dual-USB UPS models are
supported with the APC Smart-UPS 1500VA USB and APC 750VA XL USB. The feature
activates automatically during bootup if a connected UPS is detected.
can run the CLI command
status to show the current status of the USB-connected APC
Smart-UPS device and starts the monitoring service if it is not already
started. The CLI command also displays detected hardware, detected versions,
current power draw, remaining battery runtime, and other relevant status
integration feature is activated, graceful shutdown begins as soon as the
low-battery threshold is reached. Resumption or fluctuation of power will not
interrupt or cancel the shutdown, and administrators cannot stop the shutdown
after the integration feature is activated.
Unified Communications Manager or IM and Presence Service releases, MCS models,
or UPS models, you can cause an external script to monitor the UPS. When low
battery is detected, you can log in to the Unified Communications Manager or IM
and Presence Service server by using Secure Shell (SSH), access the CLI, and
Table 1 Supported
Servers for UPS Integration