Cisco 8961 Administration Manual page 158

Telephony features available for Cisco Unified IP Phone
Feature
Automatic Port Synchronization
Barge
Cisco Unified IP Phone 8961, 9951, and 9971 Administration Guide for Cisco Unified Communications Manager
10.0 (SIP)
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Description
When the Cisco Unified Communications Manager
administrator uses the Remote Port Configuration
feature to set the speed and duplex function of an IP
Phone remotely, loss of packets can occur if one port
is slower than the other.
The Automatic Port Synchronization feature
synchronizes the ports to the lower speed among the
two ports, which eliminates packet loss. When automatic
port synchronization is enabled, we recommend that
both ports be configured for autonegotiate. If one port
is enabled for autonegotiate and the other is at a fixed
speed, the phone synchronizes to the fixed port speed.
If both ports are configured for fixed speed,
Note
the Automatic Port Synchronization feature is
ineffective.
The Remote Port Configuration and Automatic
Note
Port Synchronization features are compatible
only with IEEE 802.3AF Power of Ethernet
(PoE) switches. Switches that support only
Cisco Inline Power are not compatible.
Enabling this feature on phones that are
connected to these types of switches could
result in loss of connectivity to Cisco Unified
Communications Manager, if the phone is
powered by PoE.
Allows a user to join a nonprivate call on a shared phone
line. The feature adds a user to a call and converts the
call into a conference, allowing the user and other
parties to access conference features.
The Cisco Unified IP Phone can still use Barge
Note
when the Built in Bridge Enable service
parameter is set to off. To prevent a user from
using the Barge feature on the Cisco Unified
IP Phone, you must disable Barge in Feature
Control Policy for the phone.
Features, Templates, Services, and User Setup
Configuration Reference
For more information, see Set Up
Automatic Port Synchronization, on page
184.
For more information, see:
• Cisco Unified Communications
Manager Administration Guide,
"Cisco Unified IP Phone
Configuration" chapter
• Cisco Unified Communications
Manager System Guide, "Cisco
Unified IP Phone" chapter
• Cisco Unified Communications
Manager Features and Services
Guide, "Barge and Privacy" chapter
• Cisco Unified Communications
Manager Administration Guide,
"Feature Control Policy
Configuration"