Cisco 8800 Series Manual page 163

Cisco IP Phone Configuration
Feature
Peer Firmware Sharing (PFS)
Plus Dialing
Power Negotiation over LLDP
Problem Reporting Tool
Programmable Feature Buttons
Redial
Remote Customization (RC)
Ringtone Setting
Reverse Name Lookup
RTCP Hold For SIP
Serviceability for SIP Endpoints
Description and More Information
Allows IP Phones located at remote sites to share the firmware files amongst them, which
saves bandwidth when the upgrade process takes place. This feature uses Cisco
Peer-to-Peer-Distribution Protocol (CPPDP) which is a Cisco proprietary protocol used
to form a peer-to-peer hierarchy of devices. CPPDP is also used to copy firmware or
other files from peer devices to the neighbouring devices.
PFS aids in firmware upgrades in branch/remote office deployment scenarios that run
over bandwidth-limited WAN links.
Provides the following advantages over the traditional upgrade method:
• Limits congestion on TFTP transfers to centralized remote TFTP servers
• Eliminates the need to manually control firmware upgrades
• Reduces phone downtime during upgrades when large numbers of devices are reset
simultaneously
The more the number of IP phones, the better it's performance compared to the traditional
firmware upgrade method.
Allows the user to dial E.164 numbers prefixed with a plus (+) sign.
To dial the + sign, the user needs to press and hold the star (*) key for at least 1 second.
This applies to dialing the first digit for an on-hook (including edit mode) or off-hook
call.
Allows the phone to negotiate power using Link Level Endpoint Discovery Protocol
(LLDP) and Cisco Discovery Protocol (CDP).
Submits phone logs or reports problems to an administrator.
You can assign features, such as New Call, Call Back, and Forward All to line buttons.
Allows users to call the most recently dialed phone number by pressing a button or the
Redial softkey.
Allows a service provider to customize the phone remotely. There is no need for either
the service provider to physically touch the phone or a user to configure the phone. The
service provider can work with a sales engineer at the time of ordering to set this up.
Identifies ring type used for a line when a phone has another active call.
Identifies the caller name using the incoming or outgoing call number. You must configure
either the LDAP Directory or the XML directory. You can enable or disable the reverse
name lookup using the phone administration web page.
Ensures that held calls are not dropped by the gateway. The gateway checks the status
of the RTCP port to determine if a call is active or not. By keeping the phone port open,
the gateway will not end held calls.
Enables administrators to quickly and easily gather debug information from phones.
This feature uses SSH to remotely access each IP phone. SSH must be enabled on each
phone for this feature to function.
Cisco IP Phone 8800 Series Multiplatform Phone Administration Guide for Release 11.3(1) and Later
Telephony Features for Cisco IP Phone
143