Cisco 6901 Administration Manual page 67

Chapter 5 Configuring Features, Templates, Services, and Users
Table 5-1 Telephony Features for the Cisco Unified IP Phone (continued)
Feature Description
Automatic Port When the Cisco Unified CM administrator uses the
Synchronization Remote Port Configuration feature to set the speed
and duplex function of an IP Phone remotely, loss
(Cisco Unified IP
of packets can occur if one port is slower than the
Phone 6911 only)
other.
The Automatic Port Synchronization feature
synchronizes the ports to the lowest speed among
the two ports, to eliminate packet loss. When
automatic port synchronization is enabled, it is
recommended 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.
Note
Block External to Prevents users from transferring an external call to
External Transfer another external number.
Call Forward Allows users to redirect incoming calls to another
number. Call forward options include Call Forward
All, Call Forward Busy, Call Forward No Answer,
and Call Forward No Coverage.
You hear a stutter tone when off hook if Call
Forward All is active on your phone.
Call Forward All Loop Detects and prevents Call Forward All loops.
Breakout When a Call Forward All loop is detected, the Call
Forward All configuration is ignored and the call
rings through.
Cisco Unified IP Phone 6901 and 6911 Administration Guide for Cisco Unified Communications Manager 8.6 (SCCP and SIP)
OL-24582-01
If both the ports are configured for fixed
speed, the Automatic Port Synchronization
feature is ineffective.
The Remote Port Configuration and
Automatic 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 CM, if the
phone is powered by PoE.
Telephony Features Available for the Cisco Unified IP Phone
Configuration Reference
To configure the parameter in the Cisco
Unified CM Administration application,
choose Device > Phone, select the appropriate
IP phones, and scroll to the Product Specific
Configuration Layout pane.
To configure the setting on multiple phones
simultaneously, enable Automatic Port
Synchronization in either the Enterprise Phone
Configuration (System > Enterprise Phone
Configuration) or the Common Phone Profile
Configuration (Device > Device Settings >
Common Phone Profile).
For more information, go to the
Transfer Restrictions" chapter in the Cisco
Unified Communications Manager Features
and Services Guide.
For more information, refer to:
Cisco Unified Communications Manager
•
Administration Guide,
Number Configuration"
• Cisco Unified Communications Manager
System Guide, "Cisco Unified IP
chapter.
• "Specifying Options that Appear on the
User Options Web Pages" section on
page 5-11
For more information, go to the
Unified IP Phone" chapter in the Cisco Unified
Communications Manager System Guide.
"External Call
"Directory
chapter.
Phone"
"Cisco
5-3