Cisco OL-12997-01 - Manual (Page 8)

Chapter B Setting Up and Using a Cisco Unified IP Phone as a Cisco IPICS Push-to-Talk Device
Using the Cisco IPICS Service on a Cisco Unified IP Phone
B-8
Cisco IPICS Server Administration Guide
OL-12997-01
• The Cisco IPICS operator configures the digit ID and digit password (PIN)
that are used to log into the Cisco IPICS service, or configures the system so
that these login credentials are not required. For more information, see the
“Managing Dial Login Information for a User” section on page 3-13 .
• The channels and VTGs that display in the menu are those that are available
for a user when the Cisco IPICS service starts. To view an updated list of
channels, press the Update softkey. The Cisco IPICS server does not
automatically download channel or VTG information to the phone.
• Channels returned from Cisco IPICS to a Cisco Unified IP Phone must have
a multicast connection defined in the Default Location field in the Dial Login
tab for the user. (For more information about this tab, see the
“Managing Dial
Login Information for a User” section on page 3-13 .) Channels that do not
meet this requirement do not display on the phone.
• A Cisco Unified IP Phone receives a list that is composed of associated
channels in alphabetized order, followed by a list of associated VTGs in
alphabetical order.
• A Cisco Unified IP Phone does not receive direct two-way channels or direct
dial channels because these channels require SIP unicast connections.
• By default, a phone automatically logs out of the Cisco IPICS service after
30 minutes of inactivity. (You can configure this setting in the Administration
> Options window. For more information, see the
“Managing Cisco IPICS
Options” section on page 2-127 .)
• A Cisco IPICS user can be logged in to the Cisco IPICS service with the same
login credentials on two or more phones simultaneously. In this case, the user
can send and receive audio on all of the phones.
• If a phone loses connectivity to the Cisco IPICS server while the phone user
is logged in to the Cisco IPICS service, the service retains its current state and
the user can continue to use the PTT functionality for the channel or VTG that
is currently selected. However, the phone cannot connect to other channels or
VTGs until connectivity to the server is re-established.
• When the Cisco Unified Wireless IP Phone 7921 is connected to an active
Cisco IPICS channel or VTG, the phone goes into continuous listening mode.
In this mode, the phone remains in an active receive state even if Cisco IPICS
is not transmitting audio. In this state, the phone continues to draw power
from the battery, which limits the battery life to approximately eight hours of
talk time. (When the channel or VTG is deactivated, the phone enters standby
mode to conserve power.) To ensure that you have adequate an power supply