To configure a dial peer associated with an individual Session Initiation Protocol (SIP) phone in Cisco Unified CME or a group of phones in a Cisco Unified SIP Survivable Remote Site Telephony (SRST) environment to point to Cisco Unity Express, use the b2bua command in dial-peer configuration mode. To disable B2BUA call flow on the dial peer, use the no form of this command.

Syntax Description

This command has no arguments or keywords.

Command Default

B2BUA callflow is disabled.

Command Modes

Dial-peer configuration (config-dial-peer)

Command History

Usage Guidelines

Use the b2bua command to set the Cisco Unified CME source address as the 302 redirect contact address for all calls forwarded to Cisco Unity Express.

Note	Use the b2bua command to configure Cisco SIP SRST 3.4 only after using the allow-connections command to enable B2BUA call flow on the SRST gateway.

Related Commands

To set the interval of the background save process, use the background save interval command in telephony-service configuration mode.

Syntax Description

Command Default

The default interval is 10 minutes.

Command Modes

Telephony-service configuration mode

Command History

Usage Guidelines

Use this command to define the background saving interval. The configured interval value should be in increments of 10 minutes. If 0 is configured as the interval, no backup will be created. The default interval is 10 minutes.

To set the maximum video bandwidth bytes per second (bps) for SIP IP phones, use the bandwidth video tias-modifier command in voice register global configuration mode. To reset the maximum video bandwidth for SIP phones, use the no form of this command.

Syntax Description

Command Default

No default bandwidth is set.

Command Modes

Voice register global

Command History

Usage Guidelines

Use this command to set the maximum video bandwidth for SIP IP phones. Video calls require much higher bandwidth usage than audio only calls.When there is a limitation of resources, video call bandwidth control becomes very crucial for the system. Using the bandwidth video tias-modifier command, video calls on Cisco Unified IP Phones 9951 and 9971 can use up to 1Mbps for VGA quality video.

Related Commands

To enable Busy Lamp Field (BLF) monitoring for a speed-dial number on a phone registered to Cisco Unified CME, use the blf-speed-dial command in ephone or voice register pool configuration mode. To disable BLF monitoring for speed-dial, use the no form of this command.

Syntax Description

Command Default

BLF monitoring is disabled.

Command Modes

Ephone configuration (config-ephone)
Voice register pool configuration (config-register-pool)

Command History

Usage Guidelines

This command enables a phone to monitor the status of a line associated with a speed-dial button. The device keyword enables BLF monitoring of the phone for which the watched directory number is the primary line. This allows watchers to monitor whether a user is on the phone, not just on an individual line on the phone.

The directory number associated with the speed-dial number must have presence enabled with the allow watch command. For device-level monitoring, all directory numbers associated with the monitored phone require the allow watch command. If any of the directory numbers is missing this configuration, the device status reported to the watcher could be inconsistent.

After using the blf-speed-dial command for Cisco Unified SIP IP phones, you must generate a new configuration profile using the create profile command and then restart the phones with the restart command.

For information on the BLF status indicators that display on specific types of phones in Cisco Unified CME, see the Cisco Unified IP Phone documentation for your phone model.

Related Commands

To specify the audio file used for the busy station not equipped for preemption announcement, use the bnea command in voice MLPP configuration mode. To disable use of this audio file, use the no form of this command.

Syntax Description

Command Default

No announcement is played.

Command Modes

Voice MLPP configuration (config-voice-mlpp)

Command History

Usage Guidelines

This command specifies the G.711 a-law or u-law 8-KHz encoded audio file (.wav or. au format) for the announcement that is played to the caller when the dialed number is not preemptable.

The mlpp indication command must be enabled (default) for a phone to play preemption announcements.

This command is not supported by Cisco IOS help. If you type ?, Cisco IOS help does not display a list of valid entries.

Related Commands

To specify the audio file used for the blocked precedence announcement, use the bpa command in voice MLPP configuration mode. To disable use of this audio file, use the no form of this command.

Syntax Description

Command Default

No announcement is played.

Command Modes

Voice MLPP configuration (config-voice-mlpp)

Command History

Usage Guidelines

This command specifies the G.711 a-law or u-law 8-KHz encoded audio file (.wav or .au format) for the announcement that is played to the caller in the following situations:

• Destination party for the precedence call is off hook.
• Destination party is busy with a precedence call of an equal or higher precedence and the destination party does not have Call Waiting or Call Forward configured, and does not have an attendant-console service configured.

The mlpp indication command must be enabled (default) for a phone to play precedence announcements.

This command is not supported by Cisco IOS help. If you type ? , Cisco IOS help does not display a list of valid entries.

Related Commands

To set bulk registration for E.164 numbers that will register with SIP proxy server, use the bulk command in voice register global configuration mode. To disable bulk registration, use the no form of this command.

Syntax Description

Command Default

Bulk registration is disabled.

Command Modes

Voice register global configuration (config-register-global)

Command History

Usage Guidelines

This command allows you to configure bulk registration for registering a block of phone numbers with an external registrar so that calls can be routed to Cisco CME from the SIP network.

Numbers that match the number pattern defined by using the bulk command register with the external registrar. The block of numbers that is registered can include any phone that is attached to Cisco CME using SIP or SCCP, or any analog phone that is directly attached to a Cisco router FXS port.

A number can contain one or more periods (.) as wildcard characters that will match any dialed number in that position. For example, 51.. rings when 5100 is dialed, when 5101 is dialed, and so forth.

The external registrar is configured by using the registrar server command under the SIP user-agent configuration mode.

Related Commands

To set the prefix code that phone users dial to access speed-dial numbers from a global bulk speed-dial list, use the bulk-speed-dial prefix command in telephony-service configuration mode. To return the prefix code to the default, use the no form of this command.

Syntax Description

Command Default

The default prefix code (number sign [#]) is used.

Command Modes

Telephony-service configuration (config-telephony)

Command History

Usage Guidelines

This command changes the prefix code that a phone user must dial to access speed-dial numbers from a speed-dial list that is enabled using the bulk-speed-dial list command in telephony-service configuration mode. The default prefix is # (number sign).

If a bulk speed-dial list is enabled using this command in telephony-service configuration mode and is also enable using this command in ephone configuration mode, the list enabled in ephone configuration mode takes precedence over the list at the global level for a given prefix. However, if the prefix used at the global level is different than the prefix used at the phone level, the lists are treated as separate lists - each list being associated with a different prefix, and at the phone level, you can access both lists.

Use the show telephony-service bulk-speed-dial to display information about bulk speed-dial lists that are configured in Cisco Unified CME.

Related Commands

To set the maximum number of calls allowed on an octo-line directory number before activating Call Forward Busy or a busy tone, use the busy-trigger-per-button command in ephone or ephone-template configuration mode. To reset to the default, use the no form of this command.

Syntax Description

Command Default

Disabled (busy trigger is 0).

Command Modes

Ephone configuration (config-ephone)
Ephone-template configuration (config-ephone-template)

Command History

Usage Guidelines

This command limits the calls to an octo-line on the specified phone by triggering Call Forward Busy or a busy tone. After the number of active calls, incoming and outgoing, on an octo-line directory number reaches the limit set with this command, the next incoming call to the directory number is forwarded to the Call Forward Busy destination. If Call Forward Busy is not configured, Cisco Unified CME rejects the call and plays a busy tone.

This command applies to each octo-line directory number on the phone.

If a directory number is shared among different phones, the busy trigger is initiated after the number of existing calls exceeds the limit set on any of the phones that share the directory number.

This command must be set to a value that is less than or equal to the value set with the max-calls-per-button command.

If you use an ephone template to apply a command to an ephone and you also use the same command in ephone configuration mode for the same ephone, the value that you set in ephone configuration mode has priority.

Related Commands

To set the maximum number of calls allowed on a SIP directory number before activating Call Forward Busy or a busy tone, use the busy-trigger-per-button command in voice register pool configuration mode. To reset to the default, use the no form of this command.

Syntax Description

Command Default

no busy-trigger-per-button

Command Modes

Voice register pool configuration (config-register-pool)

Command History

Usage Guidelines

This command limits the number of calls to each directory number on the specified phone by triggering Call Forward Busy or a busy tone. After the number of active calls, both incoming and outgoing, reaches the number of calls set with this command, Cisco Unified CME forwards the next incoming call to the Call Forward Busy destination. Cisco Unified CME rejects the call and plays a busy tone if Call Forward Busy is not configured.

If a directory number is shared among different phones, the busy trigger is initiated after the number of existing calls exceeds the limit set on all of the phones that share the directory number.

This command must be set to a value that is less than or equal to the value set with the max-calls-per-button command.

Related Commands

To associate ephone-dns with individual buttons on a Cisco Unified IP phone and to specify line type or ring behavior, use the button command in ephone configuration mode. To remove an ephone-dn association from a button, use the no form of this command.

Syntax Description

Command Default

No buttons are defined for an ephone.

Command Modes

Ephone configuration (config-ephone)

Command History

Usage Guidelines

The button command assigns telephone extensions to Cisco Unified IP phones by associating a button number with one or more directory numbers (ephone-dns).

Note	After adding or changing a phone button configuration using this command, you must perform a quick reboot of the phone using the restart command.

Telephone services such as call waiting and three-party conferences require a minimum of two phone lines (ephone-dns defined with the ephone-dn command) to be available and configured on a Cisco IP phone.

The Cisco Unified IP Phone 7910G has only one physical line button. To support call waiting and three-party conferences on a Cisco Unified IP Phone 7910G, a second (hidden) line is required. This line cannot be selected directly using a line button. You can access the second line when you press the Conference button. You can also support multiple-call services using the ephone-dn dual-line configuration option.

Feature Ring (f)

A feature ring is a third type of ring cadence, in addition to the internal call and external call ring cadences. For example, an internal call in the United States rings for 2 seconds on and 4 seconds off (single-pulse ring), and an external call rings for 0.4 seconds on, 0.2 seconds off, 0.4 seconds on, and 0.2 seconds off (double-pulse ring). A feature ring is a triple-pulse ring. The purpose of associating a feature ring with a line button is to be able to identify from a distance a special line that is ringing on a multiline phone.

Monitor Mode (m)

A line button set in monitor mode on one phone displays visual line status for a line that also appears on another phone. When monitor mode is set for a button with a shared line, the line status indicates that the shared line is either idle or in use. The line and line button are available in monitor mode for visual status only. Calls cannot be made or received using a line button that has been set in monitor mode. Incoming calls on a line button that is in monitor mode do not ring and do not display caller ID or call-waiting caller ID.

Monitor mode is intended for use only in the context of shared lines so that a receptionist can visually monitor the in-use status of several users’ phone extensions (for example, as a busy-lamp field). To monitor all lines on an individual phone so that a receptionist can visually monitor the in-use status of that phone, see the Watch Mode (w) section.

The line button for a monitored line can also be used as a direct-station-select for a call transfer when the monitored line is in an idle state. In this case, the receptionist who transfers a call from a normal line can press the Transfer button and then press the line button of the monitored line, causing the call to be transferred to the phone number of the monitored line.

Overlay (o)

Overlay lines are ephone-dns that share a single button on a multibutton phone. When more than one incoming call arrives on lines that are set on a single button, the line (ephone-dn) that is the leftmost in the button command list is the primary line and is given the highest priority. If this call is answered by another phone or if the caller hangs up, the phone selects the next line in its overlay set to present as the ringing call. The caller ID display updates to show the caller ID for the currently presented call.

Ephone-dns that are part of an overlay set can be single-line ephone-dns or dual-line ephone-dns, but the set must contain either all single-line ephone-dns or all dual-line ephone-dns, and not a mixture of the two.

The primary ephone-dn on each phone in a shared-line overlay set should be unique to the phone being configured to guarantee that there is a line available for outgoing calls, and to ensure that the phone user can obtain dial-tone even when there are no idle lines available in the rest of the shared-line overlay set. Use a unique ephone-dn in this manner to provide for a unique calling party identity on outbound calls made by the phone so that the called user can see which specific phone is calling.

The name of the first ephone-dn in the overlay set is not displayed because it is the default ephone-dn for calls to the phone, and the name or number is permanently displayed next to the phone’s button. For example, if there are ten ephone-dns in an overlay set, only the last nine ephone-dns are displayed when calls are made to them.

Overlay Ephone-dns with Call Waiting (c)

The configuration for the overlaid ephone-dns with call waiting (keyword c) and without call waiting (keyword o) is the same.

Ephone-dns accept call interruptions, such as call waiting, by default. For call waiting to work, the default must be active. To ensure thatthe default is active, remove the no call-waiting beep accept command from the configurations of ephone-dns for which you want to use call waiting.

In Cisco Unified CME 4.0(3), the Cisco Unified IP Phone 7931G cannot support overlays that contain ephone-dn configured for dual-line mode.

Note	In general, all the ephone-dns within an overlay must be of the same type (dual-line or single line mode).

Silent Ring (s)

You can configure silent ring on any type of phone. However, you typically set silent ring only on buttons of a phone with multiple lines, such as a Cisco Unified IP Phone 7940, Cisco Unified IP Phones 7960 and 7960G, or a Cisco Unified IP Phone 7914 Expansion Module. The only visible cue is a flashing ((< icon in the phone display.

If you configure a button to have a silent ring, you will not hear a call-waiting beep or call-waiting ring regardless of whether the ephone-dn associated with the button is configured to generate a call-waiting beep or call-waiting ring.

In Cisco IOS Release 12.4(4)XC and later releases, the silent ringing behavior is overridden during active night-service periods. Silent ringing does not apply during designated night-service periods when the s keyword is used.

Watch Mode (w)

A line button that is configured for watch mode on one phone provides visual line status for all lines on another phone (watched phone) for which the watched directory number is the primary line. Watched mode allows a phone user, such as a receptionist, to visually monitor the in-use status of an individual phone. The line and line button on the watching phone are available in watch mode for visual status only. Calls cannot be made or received using a line button that has been set in watch mode. Incoming calls on a line button that is in watch mode do not ring and do not display caller ID or call-waiting caller ID.

If any of the following conditions are true, the status of the line button in watch mode is that the watched phone is in-use:

• Watched phone is off-hook
• Watched phone is not registered
• Watched phone is in the do-not-disturb (DND) mode
• Watched directory number is not idle

If the watched directory number is a shared line and the shared line is not idle on any phone with which it is associated, then in the context of watch mode, the status of the line button indicates that the watched phone is in use.

For best results in terms of monitoring the status of an individual phone based on a watched directory number, the directory number to be configured for watch mode should not be a shared line. To monitor a shared line so that a receptionist can visually monitor the in-use status of several users’ phone extensions, see the Monitor Mode (m) section.

If the watched directory number is associated with several phones, then the watched phone is the one on which the watched directory number is on button 1 or the one on which the watched directory number is on the button that is configured by using the auto-line command, with auto-line having priority.

If more than one phone meets the criteria for primary line as described above, then the watched phone is the first phone that that meets the criteria. Typically, that is the phone with the lowest ephone tag value. However, if the watched directory number is configured on button 1 of ephone 1 and the same directory number is also configured on button 3 with “auto-line 3” of ephone 24, then ephone 24 is the watched phone because the auto-line configuration has priority.

The line button for a watched phone can also be used as a direct-station-select for a call transfer when the watched phone is idle. In this case, the phone user who transfers a call from a normal line can press the Transfer button and then press the line button of the watched directory number, causing the call to be transferred to the phone number associated with the watched directory number.

Expansion Buttons for Overlay Ephone-dns (x)

This feature works to expand coverage for an overlay button that has been configured using the o separator in the button command. Overlay buttons with call waiting that use the c separator in the button command are not eligible for overlay rollover.

Related Commands

To organize the order of the display of all buttons including line, speed dial, blf speed dial, feature buttons, and url buttons on a Cisco Unified SIP IP phone, use the button-layout command in voice register template configuration mode. To disable the feature button set and change the action of the buttons on IP phones, use the no form of this command.

Syntax Description

Command Default

No fixed set of line or feature buttons are defined.

Command Modes

Voice register template configuration (config-register-temp)

Command History

Usage Guidelines

Use the button-layout command to assign physical button numbers or ranges of numbers with button types such as line, feature, url, speed-dial, and blf-speed-dIal. After creating a voice register template and applying the template to the voice register pool you can assign the button-layout configuration to a Cisco Unified IP Phone.

Note	The first button needs to be the line button so that the phone can complete provisioning.

Related Commands

To configure a fixed set of line or feature buttons in an ephone-template which can then be applied to a supported IP phone in Cisco Unified CME, use the button-layout set command in ephone-template configuration mode. To disable the feature buttons set and change the action of the buttons on IP phones, use the no form of this command.

Syntax Description

Command Default

No fixed set of line or feature buttons are defined.

Command Modes

Ephone-template configuration (config-ephone-template)

Command History

Usage Guidelines

Use this command to configure either Set 1 or Set 2 in an ephone-template which can then be applied to an individual Cisco Unified IP Phone 7931G in Cisco Unified CME.

After a template has been created, you can apply it to an ephone using the ephone-template command in ephone configuration mode. You cannot apply more than one ephone template to an ephone.

To view your ephone-template configurations, use the show telephony-service ephone-template command.

In Cisco Unified CME 8.5 and later versions, the button-layout command allows you to assign physical button numbers or ranges of numbers with button types such as Line, Feature, URL, Speed-Dial, BLF-Speed-DIal. After creating an ephone-template you can apply the button-layout configuration to a Cisco Unified IP Phone.

Related Commands