Cisco SMART BUSINESS COMMUNICATIONS SYSTEM - FEATURE REFERENCE GUIDE 12-2010 Feature Reference page 17

DHCP setup
Differentiated
Services Code
Point
Directed call
pickup
Directories
Called-name
display
Display phone
header bar
Phone system-
message
display
Distinctive ring
Do not disturb
(DND)
DSP
Direct station
select (DSS)
Dual-tone
multifrequency
(DTMF) relay
(SIP call
control only)
DTMF relay for
H.323
networks
DTMF relay for
SIP trunks
Encrypting
stored
personal
identification
numbers
(PINs)
Ephone
Extension
mobility
© 2010 Cisco and/or its affiliates. All rights reserved. This document is Cisco Public Information.
Voice-system When a Cisco Unified IP Phone is connected to the Cisco Unified Communications 500 system, it automatically
features queries for a Dynamic Host Configuration Protocol server (onboard or external to the application). The DHCP
server responds by assigning an IP address to the Cisco Unified IP Phone and providing the IP address of the
Trivial File Transfer Protocol (TFTP) server through DHCP option 150. Then the phone registers with the Cisco
Unified Communications 500 and attempts to get configuration and phone firmware files from the TFTP server.
Voice-system DSCP packet marking specifies the class of service for each packet. Cisco Unified IP Phones get their DSCP
features information from the configuration file that is downloaded to the device.
Voice-system Any local phone user can pick up a ringing call on another phone by pressing a softkey and then dialing the
features extension. You do not need to belong to a pickup group to use this method. The softkey that you press, either
GPickUp or PickUp, depends on your configuration.
Voice-system Local, called-name display, and directory search use directory services.
features
Users, The called-name display feature can display either of the following types of names:
phones, and
● Name for a directory number in a local directory
extensions
● Name associated with an overlay directory number
Calls to the first directory number in a set of overlay numbers display a caller ID. Calls to the remaining directory
numbers in the overlay set display the name associated with the directory number.
Users, You can customize the content of an IP phone header bar, which is the top line of the IP phone display.
phones, and
The IP phone header bar, or top line, of a Cisco Unified IP Phone normally replicates the text that appears next to
extensions
the first line button. The header bar can contain a user-definable message instead of the extension number. For
example, the header bar can be used to display a name or the full E.164 number of the phone. If no description is
specified, the header bar replicates the extension number that appears next to the first button on the phone.
Users, The system-message display feature allows you to specify a custom text or display messages to appear in the
phones, and lower part of the display window on display-capable IP phones. If you do not set a custom text or display
extensions message, a default message is displayed.
Users, Distinctive ring is used to identify internal and external incoming calls. An internal call is defined as a call
phones, and originating from any Cisco Unified IP Phone that is registered in the Cisco Unified Communications 500 or is
extensions routed through the local FXS port.
Users, The DND feature prevents incoming calls from audibly ringing a phone. When DND is enabled, the phone flashes
phones, and an alert to visually indicate an incoming call instead of ringing, and you can answer the call if desired.
extensions
Voice-system A digital-signal-processor (DSP) chip provides analog FXS and FXO and digital BRI/PRI to IP connectivity, in
features addition to conferencing features for audio calls.
Users, DSS allows a multibutton phone user to transfer calls to an idle monitored line by pressing the Transfer key and
phones, and the appropriate monitored line button. A monitored line is one that appears on two phones; one phone can use the
extensions line to make and receive calls and the other phone simply monitors whether the line is in use. Consultative
transfers can occur during DSS transfers (transferring calls to idle monitored lines).
Voice-system DTMF relay handles incoming and outgoing DTMF signals for SIP calls.
features
Voice-system For IP phones on H.323 networks, DTMF is relayed using the H.245 alphanumeric method, which is defined by
features the ITU H.245 standard. This method separates DTMF digits from the voice stream and sends them as ASCII
characters in H.245 user input indication messages through the H.245 signaling channel instead of the Real-Time
Transport Protocol (RTP) channel.
Voice-system To use remote voicemail or interactive-voice-response (IVR) applications on SIP networks from Cisco Unified
features Communications 500 phones, the DTMF digits used by these phones must be converted to the RFC 2833 in-band
DTMF relay mechanism used by SIP phones. The SIP DTMF relay method is needed in the following situations:
● When SIP is used to connect a Cisco Unified Communications 500 system to a remote SIP-based IVR or
voicemail applications
● When SIP is used to connect a Cisco Unified Communications 500 system to a remote SIP-PSTN voice
gateway that goes through the PSTN to a voicemail or IVR application; SIP phones natively support in-band
DTMF relay as specified in RFC 2833
Voice-system Voicemail PIN codes are stored in encrypted form for security reasons.
features
Voice-system Ephone is a term for Cisco Unified Communications 500 configuration for phones using SCCP or the single-
features channel-per-carrier (SCPC) protocol.
Users, Extension mobility provides the benefit of phone mobility for end users. It offers a user login service that allows
phones, and phone users to temporarily access a physical phone other than their own phone and use their personal settings,
extensions such as directory number, speed-dial lists, and services, as if the phone were their own desk phone. The phone
Feature Description Guide
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