Configure Cisco Wireless Phone 9821 on Unified CM

Phone feature configuration

You can set up phones to have a variety of features, based on the needs of your users. You can apply features to all phones, a group of phones, or to individual phones.

When you set up features, the Cisco Unified Communications Manager Administration window displays information that is applicable to all phones and information that is applicable to the phone model. The information that is specific to the phone model is in the Product Specific Configuration Layout area of the window.

For information on the fields applicable to all phone models, see the Cisco Unified Communications Manager documentation.

When you set a field, the window that you set the field in is important because there is a precedence to the windows. The precedence order is:

Individual phones (highest precedence)
Group of phones
All phones (lowest precedence)

For example, if you don't want a specific set of users to access the phone web pages, but the rest of your users can access the pages, you can do the following:

Enable access to the phone web pages for all users.
Disable access to the phone web pages for each individual user, or set up a user group and disable access to the phone web pages for the group of users.
If a specific user in the user group needs access to the phone web pages, you can enable it for that particular user.

Set up phone features for all phones

1	Sign into Cisco Unified Communications Manager Administration as an administrator.
2	Select System > Enterprise Phone Configuration.
3	Set the fields you want to change.
4	Check the Enable Enterprise Settings check box for any changed fields.
5	Click Save.
6	Click Apply Config.
7	Restart the phones. This will impact all phones in your organization.

Set up phone features for a group of phones

1	Sign into Cisco Unified Communications Manager Administration as an administrator.
2	Select Device > Device Settings > Common Phone Profile.
3	Locate the profile that you want to set up.
4	Navigate to the Product Specific Configuration Layout pane and set the fields.
5	Check the Override Enterprise Settings check box for any changed fields.
6	Click Save.
7	Click Apply Config.
8	Restart the phones.

Set up phone features for a single phone

1	Sign into Cisco Unified Communications Manager Administration as an administrator.
2	Select Device > Phone.
3	Locate the phone associated with the user.
4	Navigate to the Product Specific Configuration Layout pane and set the fields.
5	Check the Override Enterprise/Common Phone Profile Settings check box for any changed fields.
6	Click Save.
7	Click Apply Config.
8	Restart the phone.

Product specific configuration parameters

The following table describes the parameters in the Product Specific Configuration Layout pane on Cisco Unified Communications Manager (Unified CM).

Table 1. Product specific configuration parameters
Parameter	Parameter type or choices	Default	Description
Disable Speakerphone	Checkbox	Unchecked	Disables the speakerphone functionality.
Disable Speakerphone and Headset	Checkbox	Unchecked	Disables all speakerphone and headset functions.
Settings Access	Disabled Enabled Restricted	Enabled	Enables, disables, or restricts access to local configuration settings in the Settings app. With restricted access, only the Phone Settings menu can be accessed. With disabled access, the Settings menu does not display any options.
Web Access	Disabled Enabled	Disabled	Enables or disables access to the phone web pages through a web browser. If you enable this field, you may expose sensitive information about the phone.
TLS Client Min Version	TLS 1.1 TLS 1.2 TLS 1.3	TLS 1.2	Specify the minimum TLS version for the phone to use when establishing a TLS connection with the server.
TLS Server Min Version	TLS 1.1 TLS 1.2 TLS 1.3	TLS 1.2	Specify the minimum TLS version for the phone, which acts as an HTTPs web server, to authenticate connections with client browsers.
HTTPS Server	HTTP and HTTPS enabled HTTPS only	HTTP and HTTPS enabled	Controls the type of communication to the phone. If you select HTTPS only, the phone communication is more secure.
Web Admin	Disabled Enabled	Disabled	Enables or disables administrator access to the phone web pages through a web browser
Admin Password	String of 8–127 characters		Defines the administrator password when you access the phone web pages as an administrator.
Bluetooth	Disabled Enabled	Enabled	Enables or disables the Bluetooth option on the phone. If disabled, the user cannot enable Bluetooth on the phone.
Out-of-Range Alert	Disabled Beep once Beep every 10 seconds Beep every 30 seconds Beep every 60 seconds	Disabled	Controls the frequency of audible alerts when the phone is out of range of an AP. The phone does not play audible alerts when the parameter value is "disabled." The phone can beep one time or regularly at 10, 30, or 60 second intervals. When the phone is within range of an AP, the alert stops.
Application URL	String of up to 256 characters		Specifies the URL that the phone uses to contact application services, including Push To Talk.
Application Request Timer	5 seconds 20 seconds	5 seconds	Controls the length of the application request timer in seconds. Increase the length of the timer if you see 405 error messages in the log file.
Application Button Activation Timer	Disabled 1 second 2 seconds 3 seconds 4 seconds 5 seconds	Disabled	Specifies the amount of time that the user must hold the Application button to activate the Application URL. Set to Disabled if you prefer the phone to activate the Application URL immediately upon detecting the trigger.
Application Button Priority	Low Medium High	Low	Indicates the priority of the Application button relative to the other phone tasks. Low—Specifies that the Application button works only when the phone is idle and on the main screen. Medium—Specifies that the button takes precedence over all tasks except when the keypad is locked. High—Specifies that the button takes precedence over all tasks on the phone. When the priority is high, the keypad is locked, and the screen is dark, pressing the Application button wakes the screen and executes the assigned function.
Emergency Numbers	String of up to 16 characters, comma separated, no spaces		Sets the emergency numbers that can be dialed without unlocking the phone keypad. Example: 911,411
Dialing Mode	On-hook Dialing Off-hook Dialing	On-hook Dialing	Sets the default dialing mode for the phones.
Power Off in Multicharger	Disabled Enabled	Disabled	When disabled, the phone doesn't power off when placed in the multicharger. When enabled, the phone powers off when placed in the multicharger.
Background Image	String up to 64 characters		Sets the background image that all users see. If you set a background image, the user cannot change the phone to another image.
Home Screen	Application View Line View	Application View	Sets the home screen to either the Application View or the Line View. Set the phone to use Line View for users that use multiple lines, speed dials, or make many calls.
Shortcut Softkey	None Favorites Local Contacts Voicemail	Favorites	Controls the function of the Shortcut softkey on the phone. The Shortcut softkey is located on the left side below the phone screen. This position remains fixed, even when the display is set to a right-to-left (RTL) language. None: the softkey is blank Favorites: the softkey displays Favorites. Local Contacts: the softkey displays Local contacts. Voicemail: the softkey displays Voicemail.
Voicemail Access	Disabled Enabled	Enabled	Controls access to voicemail.
Applications Access	Disabled Enabled	Enabled	Controls access to the Applications menu.
Recording Tone	Disabled Enabled	Disabled	Controls the playing of the tone when a user is recording a call
Recording Tone Local Volume	Integer 0–100	100	Controls the volume of the recording tone to the local user.
Recording Tone Remote Volume	Integer 0–100	50	Controls the volume of the recording tone to the remote user.
Recording Tone Duration	Integer 1–3000 milliseconds		Controls the duration of the recording tone.
Remote Log	Disabled Enabled	Disabled	Controls the ability to send logs to the syslog server.
Log Profile	Default Preset Telephony	Preset	Specifies the predefined logging profile.
Log Server	String of up to 256 characters		Identifies the IPv4 syslog server for phone debug output. The format for the address is: `address:<port>@@base=<0-7>;pfs=<0-1>`
802.1x Authentication	User Controlled Disabled Enabled	User Controlled	Specifies the 802.1x authentication feature status. When configured to Enabled or Disabled, the Device authentication option on Cisco Wireless Phone 9821 becomes read-only, preventing users from modifying 802.1X authentication settings.
Cisco Discovery Protocol (CDP)	Disabled Enabled	Enabled	Enables or disables Cisco Discovery Protocol on the phone.
SSH Access	Disabled Enabled	Disabled	Controls the access to the SSH daemon through port 22. Leaving port 22 open leaves the phone vulnerable to Denial of Service (DoS) attacks.
Ring Locale	Default Japan	Default	Controls the ringing pattern.
TLS Resumption Timer	Integer 0–3600 seconds	3600	Controls the ability to resume a TLS session without repeating the entire TLS authentication process. If the field is set to 0, then the TLS session resumption is disabled.
Record Call Log from Shared Line	Disabled Enabled	Disabled	Specifies whether to record call log from a shared line.
Minimum Ring Volume	0-Silent Volume level 1–15	0-Silent	Controls the minimum ring volume for the phone.
Load Server	String of up to 256 characters		Identifies the alternate IPv4 server that the phone uses to obtain firmware loads and upgrades.
WLAN SCEP Server	String of up to 256 characters		Specifies the SCEP Server that the phone uses to obtain certificates for WLAN authentication. Enter the hostname or the IP address (using standard IP addressing format) of the server.
WLAN Root CA Fingerprint (SHA256 or SHA1)	String of up to 95 characters		Specifies the SHA256 or SHA1 fingerprint of the Root CA to use for validation during the SCEP process when issuing certificates for WLAN authentication. We recommend that you use the SHA256 fingerprint, which can be obtained via OpenSSL (e.g. openssl x509 -in rootca.cer -noout -sha256 -fingerprint) or using a Web Browser to inspect the certificate details. Enter the 64 hexadecimal character value for the SHA256 fingerprint or the 40 hexadecimal character value for the SHA1 fingerprint with a common separator (colon, dash, period, space) or without a separator. If using a separator, then the separator should be consistently placed after every 2, 4, 8, 16, or 32 hexadecimal characters for a SHA256 fingerprint or every 2, 4, or 8 hexadecimal characters for a SHA1 fingerprint.
Console Access	Disabled Enabled	Disabled	Specifies whether the serial console is enabled or disabled.
Gratuitous ARP	Disabled, Enabled	Disabled	Enables or disables the ability for the phone to learn MAC addresses from Gratuitous ARP. This capability is required to monitor or record voice streams.
Show All Calls on Primary Line	Disabled Enabled	Disabled	Specifies is all calls presented to this phone will be shown on the primary line or not.
Advertise G.722 and iSAC Codecs	Use System Default Disabled Enabled	Use System Default	Indicates whether the phone advertises the G.722 and iSAC codecs to the Cisco Unified Communications Manager. Use System Default—Defers to the setting specified in the enterprise parameter Advertise G.722 Codec. Disabled—Does not advertise G.722 to the Cisco Unified Communications Manager. Enabled—Advertises G.722 to the Cisco Unified Communications Manager. Codec negotiation involves two steps: The phone must advertise the supported codec to Cisco Unified CM (not all endpoints support the same set of codecs). When the Cisco Unified CM gets the list of supported codecs from all phones involved in the call attempt, it chooses a commonly supported codec based on various factors, including the region pair setting.
Revert to All Calls	Disabled Enabled	Disabled	Specifies whether the phone will revert to All Calls after any call ends on a line, provided the following conditions are met: The current line is not the Primary line or All Calls line. The Revert to All Calls option is enabled. The current line has no remaining active calls. There is All Calls feature line key on the phone.
DF bit	0 1	0	Controls how network packets are sent. Packets can be sent in chunks (fragments) of various sizes. When the DF bit is set to 1 in the packet header, the network payload does not fragment when going through network devices, such as switches and routers. Removing fragmenting avoids incorrect parsing on the receiving side, but results in slightly slower speeds. The DF bit setting does not apply to ICMP, VPN, VXC VPN, or DHCP traffic.
Lowest Alerting Line State Priority	Disabled Enabled	Disabled	Specifies the alert state when using shared lines. When disabled and there is an incoming call alerting on the shared line, the LED/Line state icon reflects the alerting state instead of Remote-In-Use. When enabled, the user sees the Remote-In-Use icon when there is call alerting on the shared line.
Divert Alerting Call	Disabled Enabled	Enabled	Controls the display of the Decline softkey. Disabled: the Decline softkey doesn't display when there is an incoming call. The user can't divert or dismiss the incoming call. Enabled: the Decline softkey displays when there is an incoming call. The user can decline the call.
Allow Vibrate URI When On Call	Disabled Enabled	Disabled	Controls if the Vibrate URI command from an XSI message is allowed when the phone is active on a call. Disabled: The handset won't vibrate. Enabled: The handset will vibrate.
Customer Support Use	String of up to 64 characters		For Cisco TAC use only.
Customer support upload URL	String of up to 256 characters		Identifies the location that the phones use to upload problem reporting tool (PRT) output files.
Disable TLS Ciphers	None TLS_RSA_WITH_3DES_EDE_CBC_SHA TLS_RSA_WITH_AES_128_CBC_SHA TLS_RSA_WITH_AES_256_CBC_SHA TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256 TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256 TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384		Disables specific TLS ciphers for the phone.
Battery Lifetime Alert	Disabled Enabled	Disabled	Enables or disables Battery Lifetime alert. When enabled, the phone reminds users to verify the battery's manufacture date and replace the battery if necessary.
Battery Lifetime Alert Interval	6 Months 12 Months 18 Months 24 Months	24 Months	Specifies the interval time over which the Battery Lifetime Alert is generated.
Battery SN Reminder	Disabled Enabled	Disabled	Enables or disables Battery SN Reminder. When enabled, the phone displays a reminder after each boot-up, advising users to verify the battery's manufacture date and replace the battery if necessary.
MARI	Disabled Enabled	Enabled	Enables or disables Media Adaptation and Resilience Implementation (MARI), which monitors the network conditions in real time and dynamically executes corrective algorithms to maintain optimal quality of experience in lossy networks. MARI may apply Rate Adaptation or Forward Error Correction based on network conditions.
MARI FEC	Disabled Enabled	Enabled	Enables or disables MARI Forward Error Correction (FEC). When enabled, MARI can use FEC in the event of packet loss. FEC is a resilience mechanism used to recover lost packets without the need for retransmission. FEC adds extra packets to the original media stream so that the media receiver can reconstruct the missing data with these packets to provide better audio or video quality in lossy networks. Because FEC increases bandwidth usage, it may negatively impact media quality in congested or bandwidth-constrained networks. You can decide whether to disable it based on your network conditions.
Action Button Function 1-3	Off Emergency Call Custom	Off	You can configure the button with a specific service. Off: When set to Off, the Action button for single service on the phone will not function. Emergency Call: Users can use the Action button to place an emergency call, if configured. Custom: Users can use the Action button to access the custom service, if configured. When you set the field to Emergency Call or Custom, make sure that you enter the service destination in the Action Button Service Destination field. Or, the phone will display a configuration error.
Action Button Service Name 1-3	String of up to 20 characters		Optionally specify a name for the service associated with the Action button. This name will be displayed in the on-screen message when the user presses the button, indicating which service will be triggered. If you don't specify a name, the default name will be Emergency call, Silent emergency call, or Custom action based on your selection in the Action Button Function field.
Action Button Service Destination 1-3	String of up to 1024 characters		Provide the service destination in one of the following formats based on the service assigned to the Action button: For emergency call services, enter a telephone number or the URI of emergency service. When configure the button for a custom service, enter the service URL. The URL must start with `http://` or `https://`. For example, `https://10.11.20.159/path/service.xml`. Cisco Unified CM requires percent encoding for the reserved characters in accordance with RFC 3986. You need to enter the corresponding percent encoding as a replacement for the reserved characters. For example, to input a URL including ampersand (&), use %26 as a replacement. In this case, enter http://1.2.3.4/phone?a=1%26b=2%26c=3 instead of http://1.2.3.4/phone?a=1&b=2&c=3. For detailed information about the percent encoding and the reserved characters, see the Percent encoding for reserved characters table. To configure the button to initiate multiple events with a single trigger, enter `tel:<phonenumber or SIP URL> + <Service RUL>`. Example: `tel:1234 + https://10.11.20.159/path/service.xml`. Calling SIP URIs is also supported. Enter the URI in the format of `tel: sip 4567@co.webex.com` For more information about a single trigger for multiple events, see A single trigger for multiple events parameter settings. If you enable the Action button without setting a valid service destination, the user on the phone will see a message prompting for configuration. After the user closes this notification, the warning icon will persist in the header of the phone screen until the button is properly configured or disabled. You cannot use phone numbers as destinations for custom services. If you configure the Action Button as Custom and enter a phone number as the service destination, an alert message will display on the phone indicating that the button is unconfigured. Instead, you can add a phone number in this format `tel:<phone number>`, for example, `tel:1234`.
Service Trigger 1-3	Single Press Long Press Press 3 times	Single Press	Choose how users can place an emergency call or initiate a custom service using the phone's Action button. Single Press: Press the Action button to trigger the associated call or service. Long Press: Press the Action button down for at least 2 seconds to trigger the associated call or service. Press 3 times: Press the Action button three times with intervals of one second between each press to trigger the associated call or service. Don't repeat a trigger across multiple services, as the parameters with lower priority will not function. The priority order, from highest to lowest, is as follows: Group 1, Group 2, Group 3.
Dial Out Delay 1-3	Integer 0–30	5	Set the timeout period, in seconds, for the phone to initiate an emergency call or a custom action after the Action button is pressed. Set it to 0 if you prefer the phone to place the call or initiate an event immediately upon detecting the trigger, as specified by a single press, long press, or triple presses on the button. The delay screen displays a countdown timer, allowing the user to cancel the action triggered by the Action button. During emergency call and custom services scenarios, Cisco Wireless Phone 9821 vibrates continuously while the delay screen is displayed. However, for silent emergency calls or signals, Cisco Wireless Phone 9821 does not vibrate.
Silent Emergency Call 1-3	Disabled Enabled	Disabled	Silent emergency call is designed for discreet assistance in dangerous situations. It enables users to seek help without making any noise. When enabled, users are able to place one-way calls with the Action button. After the silent emergency call is placed, only the other party can end the call. To avoid drawing attention during the ongoing call, the Cisco Wireless Phone 9821 screen will be turned off. The phone locks all functions during a silent emergency call, by default. To allow users to restore normal phone operation while maintaining the silent emergency call, enable the Allow Silent Emergency Call Retrieval feature. When disabled, the emergency call functions as a two-way call, similar to other outgoing calls.
Custom Content Field 1-3	String of up to 1024 characters		Specifies HTTP data such as method, header, and post content. When configured, the phone sends an HTTP Post request when the Action is pressed. customized content. For example, `--method POST --header %27Field1: Value1%27 --header %27Field2: Value2%27 --body %27body_content%27`. You can use macros in the HTTP data, such as `$SS`. If the service requires authentication to access, make sure to enter the authentication secret in the Service Secret field. In the HTTP data, use the macro `$SS` as a reference to Service Secret. For POST script examples and the syntax, see HTTP Post request for the Action button. This setting works only when the Action Button Function is set to Custom.
Service Secret 1-3	String of up to 1024 characters		Set a secret string which can be an authentication secret, token or password. The entered secret is displayed as a masked string and can be referenced using the macro `$SS` in Custom Content Field and Action Button Service Destination.
Allow Silent Emergency Call Retrieval	Yes No	No	Controls whether users can retrieve phone functionality during a silent emergency call. By default, once a silent emergency call is initiated, the phone locks all functions until the call recipient ends the call. When this parameter is set to Yes, users can press any key to restore normal phone operation while maintaining the emergency call. The call audio remains silent unless the user increases the volume using the Volume key.
Audio Compliance Standard	TIA ETSI HAC	TIA	Selects an option for IP phone to comply with different telecom Audio Compliance Standards, including TIA(Telecommunications Industry Association), ETSI (European Telecommunications Standards Institute) and HAC (Hearing Aid Compatibility).
HELD Support for Third-Party E911	Disabled Enabled	Disabled	Enables or disables the phones to utilize the HTTP Enabled Location Delivery (HELD) protocol with a third-party E911 provider if configured correctly and possessing the appropriate licenses.
Secure Debug Mode Visible	Disabled Enabled	Disabled	Makes the secure debug mode enable parameter visible to users and enables/disables the secure debug mode implicitly.
Microphone Audio on Wireless Phone	User Controlled Original Noise remove Optimize for my voice	User Controlled	Selects an option for how your microphone audio is processed and heard during calls. User controlled: Allows users to configure this setting directly on the phones. Original: Preserves all audios, including music and noise, without processing. Noise remove: Removes all noise. Optimize for my voice: Removes all noise and background voices. When configured to Original, Noise remove, or Optimize for my voice, the Microphone audio settings on Cisco Wireless Phone 9821 becomes read-only, preventing users from modifying the audio settings. Audio optimization consumes additional power and can reduce battery life on Cisco Wireless Phone 9821.

Table 2. Percent encoding for reserved characters
Character	Percent encoding
&	%26
'	%27
"	%22
\	%5c
<	%3c
>	%3e

Cisco Wireless Phone 9821 configuration tasks on Cisco Unified CM

As a supplement to the parameters in the previous section, the following table provides links to some configuration tasks for Cisco Wireless Phone 9821 on Cisco Unified Communications Manager (Unified CM). These tasks cover a broad range of setup and management functions to support diverse needs and functionalities

Table 3. Phone configuration tasks on Cisco Unified CM
Task	Description
Set up Do Not Disturb (DND)	When DND is turned on, either no audible rings occur during the ringing-in state of a call, or no audible or visual notifications of any type occur. If multilevel precedence and preemption (MLPP) is configured and the user receives a precedence call, the phone will ring with a special ringtone.
Set up forward all	Set up the phone to redirect incoming calls to another phone number or to voicemail.
Add speed-dial numbers	Add speed-dial numbers to a phone from Cisco Unified CM. Users can call the people by using the numbers directly.
Configure park monitoring	Configure park monitoring to monitor the status of a parked call.
Set up Music on Hold (MOH)	When a user places an active call on hold, the held call plays a music streamed from the Music on Hold server.
Set up call recording	Enable the call recording feature on a phone so that the users can record an active call or call conference.
Set up hold reversion	When a user places an active call on hold and the configured time limit expires, Cisco Unified CM generates an alert on the phone, such as ring or beep, to remind the user to handle the call. The held call becomes a reverted call when the hold duration exceeds the configured time limit.
Set up privacy on shared lines	Set up the privacy on shared lines to determine whether a user can view the call status and barge into a call or conference.
Set up barge	Set up the phone to allow a user to join a remotely active (conference) call on a shared line.
Set up Malicious Call Identification (MCID)	Configure the Malicious Call Identification (MCID) feature to track troublesome or threatening calls. Users can report these calls by requesting that Cisco Unified Communications Manager (Unified CM) identify and register the source of the incoming call in the network.
Set up password protection for the Settings menu	Secure the Settings menu on a phone with password protection. Once enabled, the users are required to provide the correct password to access the Settings menu.
Control the Settings menu access	Control whether a user has full or partial access to the Settings menu on the phone.
Set up date and time group	Select, create, or modify a predefined date and time group for a device pool.
Set up wideband codec	Control whether the phone advertises the G.722 and iSAC codecs to Cisco Unified CM.
Configure application dial rules	Add and sort the priority of dialing rules for applications. Application dial rules automatically strip numbers from or add numbers to telephone numbers that a user dials.
Set up phone services	Configure special phone services. These services are XML applications that enable the display of interactive content with text and graphics on the phone.
Set up Self Care Portal for your phone users	Control users' access to the Self Care Portal and customize the Self Care Portal display.
Set up Problem Report Tool (PRT)	Set up the Problem Report Tool for users to submit problem reports.
Configure the Action button	Customize the Action button to initiate events that suit users' specific use cases.
Custom wallpaper for Cisco Wireless Phone 9821	Add custom wallpaper to Cisco Wireless Phone 9821.
Configure ring setting	Customize ring settings to determine whether the phone rings and to adjust the ringing behavior for incoming calls.
Configure auto answer	Enable Cisco Wireless Phone 9821 to automatically answer incoming calls via the speakerphone or a connected headset.
Set up Survivable Remote Site Telephony (SRST)	Set up SRST so that basic call-processing capabilities remain available during WAN outages.
Customize Message Waiting Indicator (MWI) policy	Customize the audible and visual MWI policies for Cisco Wireless Phone 9821.
Enable E911 services on your phone	Enable Cisco Wireless Phone 9821 to utilize the HTTP Enabled Location Delivery (HELD) protocol with a third-party E911 provider if configured correctly and possessing the appropriate licenses.
Configure your phones for emergency calls (E911)	Configure the E911 location service on Cisco Wireless Phone 9821 to have an active location URI for emergency calls.
Set up the supported versions of TLS	Set up the minimum version of TLS required for client and server respectively.
Turn off speakerphone and headset	Turn off these audio outputs ensures that conversations are not heard by others nearby.
Configure SIP Dial Rules	SIP dial rules provide local dial plans for Cisco IP Phones that are running SIP, so users do not have to press a key or wait for a timer before the call gets processed. The administrator configures the SIP dial rule and applies it to the phone that is running SIP.
Configure Call Pickup	The Call Pickup feature allows users to answer calls that come in on a directory number other than their own.
Configure Hunt Pilots	The hunt group feature allows incoming calls to be distributed efficiently among a group of directory numbers or agents until a call is answered. A hunt group is a combination of several elements: the hunt pilot, the hunt list, and the line groups. Administrators configure the hunt pilot number and associate it with a hunt list, which in turn contains line groups with directory numbers that form the hunt group members.
Configure Intercom	Intercom is a type of phone line that combines the functionality of a traditional line and a speed dial. With an intercom line, a user can call the intercom line of another user, which answers automatically to one-way audio whisper. The recipient can then acknowledge the whispered call and initiate a two-way intercom call.
Set up extension mobility	Cisco Extension Mobility allows users to temporarily access their phone settings, such as line appearances, services, and speed dials, from other phones within your system.

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Phone feature configuration

Set up phone features for all phones

Set up phone features for a group of phones

Set up phone features for a single phone

Product specific configuration parameters

Cisco Wireless Phone 9821 configuration tasks on Cisco Unified CM

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