Cisco Unified SCCP and SIP SRST System Administrator Guide (All Versions)

Configuring Cisco Unified SRST to Support Phone Functions

Note

When the Cisco Unified SRST is enabled, Cisco Unified IP Phones do not have to be reconfigured while in Cisco Unified Communications Manager fallback mode because phones retain the same configuration that was used with Cisco Unified Communications Manager.

To configure Cisco Unified SRST on the router to support the Cisco Unified IP Phone functions, use the following commands beginning in global configuration mode.

SUMMARY STEPS

call-manager-fallback
ip source-address ip-address [port port ] [ any-match | strict-match ]
max-dnmax-directory-numbers[dual-line][preferencepreference-order]
max-ephones max-ephones
limit-dn phone-type max-lines
exit

DETAILED STEPS

Command or Action Purpose

Step 1

call-manager-fallback

Example:

Router(config)# call-manager-fallback

Enters call-manager-fallback configuration mode.

Step 2

ip source-address ip-address [port port ] [ any-match | strict-match ]

Example:

Router(config-cm-fallback)# ip source-address
10.6.21.4 port 2002 strict-match

Enables the router to receive messages from the Cisco IP phones through the specified IP addresses and provides for strict IP address verification. The default port number is 2000.

Step 3

max-dnmax-directory-numbers[dual-line][preferencepreference-order]

Example:

Router(config-cm-fallback)# max-dn 15 dual-line preference 1

Sets the maximum number of directory numbers (DNs) or virtual voice ports that can be supported by the router and activates dual-line mode.

max-directory-numbers :Maximum number of directory numbers (dns) or virtual voice ports supported by the router. The maximum number is platform-dependent. The default is 0. See Compatibility Information for further details.
dual-line (Optional). Allows IP phones in Cisco Unified Communications Manager fallback mode to have a virtual voice port with two channels.
preference preference-order (Optional). Sets the global preference for creating the VoIP dial peers for all directory numbers that are associated with the primary number. Range is from 0 to 10. Default is 0, which is the highest preference.

The alias command also has a preference keyword that sets alias command preference values. Setting the alias commandpreference keyword allows the default preference set with the max-dn command to be overridden. See the “Configuring Call Rerouting” section on page 192 for more information on using the max-dn command with the alias command.

Note

You must reboot the router to reduce the limit of the directory numbers or virtual voice ports after the maximum allowable number is configured.

Step 4

max-ephones max-ephones

Example:

Router(config-cm-fallback)# max-ephones 24

Configures the maximum number of Cisco IP phones that can be supported by the router. The default is 0. The maximum number is platform dependent. See Compatibility Information for further details.

Note

You must reboot the router to reduce the limit of Cisco IP phones after the maximum allowable number is configured.

Step 5

limit-dn phone-type max-lines

Example:

Router(config-cm-fallback)# limit-dn 7945 2

Optional) Limits the directory number lines on Cisco IP phones during Cisco Unified CM fallback.

Note

You must configure this command during initial Cisco Unified SRST router configuration, before any phone actually registers with the Cisco Unified SRST router. However, you can modify the number of lines at a later time.

For a list of available phones, see Cisco SRST and SIP SRST Command Reference (All Versions).

Step 6

exit

Example:

Router(config-cm-fallback)# exit

Exits call-manager-fallback configuration mode.

Configuring Cisco Unified 8941 and 8945 SCCP IP Phones

To configure Cisco Unified 8941 and 8945 SCCP IP Phones in Unified SRST mode, perform the following commands:

Note

This section is required only in SRST version 8.6 and is not required for version 8.8 and higher.

SUMMARY STEPS

enable
configure terminal
ephone-type phone-type
device-idnumber
device-type phone-type
end

DETAILED STEPS

	Command or Action	Purpose
Step 1	enable Example: `Router> enable`	Enables privileged EXEC mode. Enter your password if prompted.
Step 2	configure terminal Example: `Router# configure terminal`	Enters global configuration mode.
Step 3	ephone-type `phone-type` Example: `phone-type`	Enters phone type to configure. 8941 8945
Step 4	device-id`number` Example: `Router(config-ephone-type)# device-id 586`	Specifies the device ID for the phone type. 8941—586 8945—585
Step 5	device-type `phone-type` Example: `Router(config-ephone-type)# device-type 8941`	Specifies the device type for the phone. 8941 8945
Step 6	end Example: `Router(config-ephone-type)# end`	Returns to privileged EXEC mode.

Verifying That Cisco Unified SRST Is Enabled

To verify that the Cisco Unified SRST feature is enabled, perform the following steps:

Enter the show running-config command to verify the configuration.
Enter the show call-manager-fallback all command to verify that the Cisco Unified SRST feature is enabled.
Use the Settings display on the Cisco IP phones in your network to verify that the default router IP address on the phones matches the IP address of the Cisco Unified SRST router.
To temporarily block the TCP port 2000 Skinny Client Control Protocol (SCCP) connection for one of the Cisco IP phones to force the Cisco IP phone to lose its connection to the Cisco Unified Communications Manager and register with the Cisco Unified SRST router, perform the following steps:
1. Use the appropriate IP access-list command to temporarily disconnect a Cisco Unified IP Phone from the Cisco Unified Communications Manager. During a WAN connection failure, when Cisco Unified SRST is enabled, Cisco Unified IP Phones display a message informing you that they are operating in Cisco Unified Communications Manager fallback mode. The Cisco IP Phone 7960 and Cisco IP Phone 7940 display a “CM Fallback Service Operating” message, and the Cisco IP Phone 7910 displays a “CM Fallback Service” message when operating in Cisco Unified Communications Manager fallback mode. When the Cisco Unified Communications Manager is restored, the message goes away and full Cisco IP phone functionality is restored.
2. Use the debug ephone register command to observe the registration process of the Cisco IP phone on the Cisco Unified SRST router.
3. Use the show ephone command to display the Cisco IP phones that have registered to the Cisco Unified SRST router.
4. Enter the no form of the appropriate access-list command to restore normal service for the phone.

Configuring IP Phone Clock, Date, and Time Formats

The Cisco Unified IP Phone 7970G and Cisco Unified IP Phone 7971G-GE IP phones obtain the correct timezone from Cisco Unified Communications Manager. They also receive the Coordinated Universal Time (UTC) time from the SRST router during SRST registration. When in SRST mode, the phones take the timezone and the UTC time, and apply a timezone offset to produce the correct time display.

Cisco IP Phone 7960 IP phones and other similar SCCP phones such as the Cisco IP Phone 7940, get their display clock information from the local time of the SRST router during SRST registration. If the Cisco Unified SRST router is configured to use the Network Time Protocol (NTP) to automatically sync the Cisco Unified SRST router time from an NTP time server, only UTC time is delivered to the router. This is because the NTP server could be physically located anywhere in the world, in any timezone. As it is important to display the correct local time, use the clock timezone command to adjust or offset the Cisco Unified SRST router time.

The date and time formats that appear on the displays of all Cisco Unified IP Phones in Cisco Unified CM fallback mode are selected using the date-format and time-format commands as configured below:

SUMMARY STEPS

clock timezonezone hours-offset[minutes-offset]
call-manager-fallback
date-format {mm-dd-yy|dd-mm-yy|yy-dd-mm|yy-mm-dd}
time-format [12 | 24 ]
exit

DETAILED STEPS

	Command or Action	Purpose
Step 1	clock timezone`zone hours-offset`[`minutes-offset`] Example: `Router(config)# clock timezone PST -8`	Sets the time zone for display purposes. zone : Name of the time zone to be displayed when standard time is in effect. The length of the zone argument is limited to 7 characters. hours-offset : The number of hour difference from Coordinated Universal Time (UTC). minutes-offset (Optional). Minutes difference from UTC.
Step 2	call-manager-fallback Example: `Router(config)# call-manager-fallback`	Enters call-manager-fallback configuration mode.
Step 3	date-format {mm-dd-yy\|dd-mm-yy\|yy-dd-mm\|yy-mm-dd} Example: `Router(config-cm-fallback)# date-format yy-dd-mm`	Sets the date format for IP phone display. The choices are mm-dd-yy , dd-mm-yy , yy-dd-mm , and yy-mm-dd , where dd : day mm : month yy : year The default is set to mm-dd-yy.
Step 4	time-format [12 \| 24 ] Example: `Router(config-cm-fallback)# time-format 24`	Sets the time display format on all Cisco Unified IP Phones registered with the router. The default is set to a 12-hour clock.
Step 5	exit Example: `Router(config-cm-fallback)# exit`	Exits call-manager-fallback configuration mode.

Example

The following example sets the time zone to Pacific Standard Time (PST), which is 8 hours behind UTC and sets the time display format to a 24 hour clock:

Router(config)# clock timezone PST -8
Rounter(config)# call-manager-fallback
Rounter(config-cm-fallback)# time-format 24

Configuring IP Phone Language Display

During Cisco Unified CM fallback, the language displays shown on Cisco Unified IP Phones default to the ISO-3166 country code of US (United States). The Cisco Unified IP Phone 7940 and Cisco Unified IP Phone 7960 can be configured for different languages (character sets and spelling conventions) using the user-locale command.

Note

This configuration option is available in Cisco SRST V2.1 and later versions running under Cisco Unified CM V3.2 and later versions. Systems with software prior to Cisco Unified SRST V2.1 and Cisco Unified CM V3.2 can use the default country, United States (US), only.

SUMMARY STEPS

call-manager-fallback
configure terminal
user-locale country-code
exit

DETAILED STEPS

	Command or Action	Purpose
Step 1	call-manager-fallback Example: `Router(config)# call-manager-fallback`	Enters call-manager-fallback configuration mode.
Step 2	configure terminal Example: `Router# configure terminal`	Enters global configuration mode.
Step 3	user-locale `country-code` Example: `Router(config-cm-fallback)# user-locale ES`	Selects a language by country for displays on the Cisco IP Phone 7940 and Cisco IP Phone 7960. The following ISO-3166 codes are available to Cisco SRST and Cisco Unified SRST systems running under Cisco Communications Manager V3.2 or later versions: DE : German. DK : Danish. ES : Spanish. FR : French. IT : Italian. JP : Japanese Katakana (available under Cisco Unified Communications Manager V4.0 or later versions). NL : Dutch. NO : Norwegian. PT : Portuguese. RU : Russian. SE : Swedish. US : United States English (default).
Step 4	exit Example: `Router(config-cm-fallback)# exit`	Exits call-manager-fallback configuration mode.

Example

The following example offers a configuration for the Portugal user locale:

call-manager-fallback
user-locale PT

Configuring Customized System Messages for Cisco Unified IP Phones

Use the system message command to customize the system message displayed on all Cisco Unified IP Phones during Cisco Unified CM fallback.

One of two keywords, primary and secondary, must be included in the command. The primary keyword is for IP phones that can support static text messages during fallback. The default display message for primary IP phones in fallback mode is “CM Fallback Service Operating.”

The secondary keyword is for Cisco Unified IP Phones that do not support static text messages and have a limited display space. Secondary IP phones flash messages during fallback. The default display message for secondary IP phones in fallback mode is “CM Fallback Service.”

Changes to the display message will occur immediately after configuration or at the end of each call.

Note

The normal in-service static text message is controlled by Cisco Unified Communications Manager.

SUMMARY STEPS

call-manager-fallback
system message {primaryprimary-string|secondarysecondary-string}
exit

DETAILED STEPS

Command or Action Purpose

Step 1

call-manager-fallback

Example:

Router(config)# call-manager-fallback

Enters call-manager-fallback configuration mode.

Step 2

system message {primaryprimary-string|secondarysecondary-string}

Example:

Router(config-cm-fallback)# system message primary Custom Message

Declares the text for the system display message on IP phones in fallback mode.

primary primary-string : For Cisco Unified IP Phones that can support static text messages during fallback, such as the Cisco Unified IP Phone 7940 and Cisco Unified IP Phone 7960 units. A string of approximately 27 to 30 characters is allowed.
secondary secondary-string : For Cisco Unified IP Phones that do not support static text messages, such as the Cisco Unified IP Phone 7910. A string of approximately 20 characters is allowed.

Step 3

exit

Example:

Router(config-cm-fallback)# exit

Exits call-manager-fallback configuration mode.

Example

The following example sets “SRST V3.0” as the system display message for all Cisco Unified IP Phones on a router:


call-manager-fallback
 system message primary SRST V3.0
 system message secondary SRST V3.0
 exit

Configuring a Secondary Dial Tone

A secondary dial tone can be generated when a phone user dials a predefined PSTN access prefix and can be terminated when additional digits are dialed. An example is when a secondary dial tone is heard after the number 9 is dialed to reach an outside line.

SUMMARY STEPS

call-manager-fallback
secondary-dialtonedigit-string
exit

DETAILED STEPS

Command or Action Purpose

Step 1

call-manager-fallback

Example:

Router(config)# call-manager-fallback

Enters call-manager-fallback configuration mode.

Step 2

secondary-dialtonedigit-string

Example:

Router(config-cm-fallback)# secondary-dialtone 9

Activates a secondary dial tone when a digit string is dialed.

Step 3

exit

Example:

Router(config-cm-fallback)# exit

Exits call-manager-fallback configuration mode.

Example

The following example sets the number 8 to trigger a secondary dial tone:

call-manager-fallback
secondary-dialtone 8

Configuring Dual-Line Phones

Dual-line phone configuration is required for dual-line phone operation during Cisco Unified CM fallback, see the “Enabling Consultative Call Transfer and Forward Using H.450.2 and H.450.3 with Cisco SRST 3.0” section on page 210.

Dual-line IP phones are supported during Cisco Unified CM fallback using the max-dn command. Dual-line IP phones have one voice port with two channels to handle two independent calls. This capability enables call waiting, call transfer, and conference functions on a phone-line button.

In dual-line mode, each IP phone and its associated line button can support one or two calls. Selection of one of two calls on the same line is made using the blue Navigation button located below the phone display. When one of the dual-line channels is used on a specific phone, other phones that share the ephone-dn will be unable to use the secondary channel. The secondary channel will be reserved for use with the primary dual-line channel.

It is recommended that hunting be disabled to the second channel. For more information, see the “Configuring Dial-Peer and Channel Hunting” section on page 206.

SUMMARY STEPS

call-manager-fallback
max-dnmax-directory-numbers[dual-line][preferencepreference-order]
exit

DETAILED STEPS

Command or Action Purpose

Step 1

call-manager-fallback

Example:

Router(config)# call-manager-fallback

Enters call-manager-fallback configuration mode.

Step 2

max-dnmax-directory-numbers[dual-line][preferencepreference-order]

Example:

Router(config-cm-fallback)# max-dn 15 dual-line preference 1

Sets the maximum number of directory numbers (DNs) or virtual voice ports that can be supported by the router and activates dual-line mode.

max-directory-numbers :Maximum number of directory numbers (dns) or virtual voice ports supported by the router. The maximum number is platform-dependent. The default is 0. See Compatibility Information for further details.
dual-line (Optional). Allows IP phones in Cisco Unified Communications Manager fallback mode to have a virtual voice port with two channels.
preference preference-order (Optional). Sets the global preference for creating the VoIP dial peers for all directory numbers that are associated with the primary number. Range is from 0 to 10. Default is 0, which is the highest preference.

The alias command also has a preference keyword that sets alias command preference values. Setting the alias commandpreference keyword allows the default preference set with the max-dn command to be overridden. See the “Configuring Call Rerouting” section on page 192 for more information on using the max-dn command with the alias command.

Step 3

exit

Example:

Router(config-cm-fallback)# exit

Exits call-manager-fallback configuration mode.

Example

The following example sets the maximum number of DNs or virtual voice ports that can be supported by a router to 10 and activates the dual-line mode for all IP phones in Cisco Unified CM fallback mode:


call-manager-fallback
 max-dn 10 dual-line
 exit

Configuring Eight Calls per Button (Octo-Line)

The octo-line feature supports up to eight active calls, both incoming and outgoing, on a single button. Eight incoming calls to an octo-line directory number ring simultaneously. After an incoming call is answered, the ringing stops and the remaining seven incoming calls hear a call waiting tone.

After an incoming call on an octo-line directory number is answered, the answering phone is in the connected state. Other phones that share the directory number are in the remoteMultiline state. A subsequent incoming call sends the call waiting tone to the phone connected to the call, and sends the ringing tone to the other phones that are in the remoteMultiline state. All phones sharing the directory number can pick up any of the incoming unanswered calls.

When multiple incoming calls ring on an octo-line directory number that is shared among multiple phones, the ringing tone stops on the phone that answers the call, and the call waiting tone is heard for other unanswered calls. The multiple instances of the ringing calls is displayed on other ephones sharing the directory number. After a connected call on an octo-line directory number is put on-hold, any phone that shares this directory number can pick up the held call. If a phone is in the process of transferring a call or creating a conference, other phones that share the octo-line directory number cannot steal the call.

As new calls come in on an octo-line, the system searches for the next available idle line using the huntstop chan tag command, where tag is a number from 1 to 8. An idle channel is selected from the lowest number to the highest. When the highest number of allowed calls is received, the system stops hunting for available channels. Use this command to limit the number of incoming calls on an octo-line directory number and reserve channels for outgoing calls or features such as call transfer or conference calls.

With the new feature, you can:

Configure only dual-line mode
Configure only octo-line mode
Configure dual-line mode and octo-line mode

Restrictions

Octo-line directory numbers are not supported by the Cisco Unified IP Phone 7902, 7920, or 7931, or by analog phones connected to Cisco ATA or Cisco VG224.

Before you begin

Cisco Unified SRST 7.0/4.3
Cisco Unified CM 6.0
Cisco IOS Release 12.4(15)XZ

SUMMARY STEPS

enable
configure terminal
call-manager-fallback
max-dn max-no-of-directories[dual-line |octo-line] [number octo-line]
huntstop channel1-8
end

DETAILED STEPS

	Command or Action	Purpose
Step 1	enable Example: `Router> enable`	Enables privileged EXEC mode. Enter your password if prompted.
Step 2	configure terminal Example: `Router# configure terminal`	Enters global configuration mode.
Step 3	call-manager-fallback Example: `Router(config)# call-manager-fallback`	Enters call-manager-fallback configuration mode.
Step 4	max-dn max-no-of-directories[`dual-line` \|`octo-line`] [`number octo-line`] Example: `Router(config-cm-fallback)# max-dn 15 dual-line 6 octo-line`	Sets the maximum number of DNs or virtual voice ports that can be supported by the router and activates dual-line mode, octo-line mode, or both modes. max-no-of-directories : Maximum number of directory numbers (dns) or virtual voice ports supported by the router. The maximum number is platform-dependent. The default is 0. dual-line : (Optional) Allows IP phones in Cisco Unified Communications Manager fallback mode to have a virtual voice port with two channels. octo-line : (Optional) Allows IP phones in Cisco Unified Communications Manager fallback mode to have a virtual voice port with eight channels. number (Optional): Sets the number of directory numbers for octo-mode.
Step 5	huntstop channel`1-8` Example: `Router(config-cm-fallback)# huntstop channel 4`	Enables channel huntstop on an octo-line, which keeps a call from hunting to the next channel of a directory number if the last allowed channel is busy or does not answer. number : Number of channels available to accept incoming calls. The remaining channels are reserved for outgoing calls and features such as call transfer, call waiting, and conferencing. The range is 1 to 8 and the default is 8. The command is supported for octo-line directory numbers only.
Step 6	end Example: `Router(config)# end`	Returns to privileged EXEC mode.

Example

In the following example, octo-line mode is enabled, there are 8 octo-line directory numbers, there are a maximum of 23 directory numbers, and a maximum of 6 channels are available for incoming calls:


!
call-manager-fallback
max-dn 23 octo-line 8
huntstop channel 6

Configuring the Maximum Number of Calls

To configure the maximum number of calls on a Cisco Unified SCCP IP phone in Cisco Unified SRST 9.0, perform the following steps.

Before you begin

Cisco Unified SRST 9.0 and later versions.
Correct firmware, 9.2(1) or a later version, is installed.

SUMMARY STEPS

enable
configure terminal
call-manager-fallback
max-dn max-no-of-directories [dual-line | octo-line ]
timeouts busy seconds
end

DETAILED STEPS

	Command or Action	Purpose
Step 1	enable Example: `Router> enable`	Enables privileged EXEC mode. Enter your password if prompted.
Step 2	configure terminal Example: `Router# configure terminal`	Enters global configuration mode.
Step 3	call-manager-fallback Example: `Router(config)# call-manager-fallback`	Enables Cisco Unified SRST support and enters call-manager-fallback configuration mode.
Step 4	max-dn `max-no-of-directories` [dual-line \| octo-line ] Example: `Router(config-cm-fallback)# max-dn 10 octo-line`	Sets the maximum possible number of directory numbers or virtual voice ports that can be supported by a router and enables dual-line mode, octo-line mode, or both modes. max-no-of-directories —Maximum number of directory numbers or virtual voice ports supported by the router. The maximum possible number is platform-dependent. The default is 0 directory numbers and 1 channel per virtual port. dual-line —(Optional) Sets all Cisco Unified IP phones connected to a Cisco Unified SRST router to one virtual voice port with two channels. octo-line —(Optional) Sets all Cisco Unified IP phones connected to a Cisco Unified SRST router to one virtual voice port with eight channels.
Step 5	timeouts busy `seconds` Example: `Router(config-cm-fallback)# timeouts busy 10`	Sets the timeout value for call transfers to busy destinations. seconds —Number of seconds after connection to a busy destination before a transferred call is disconnected. Range is 0 to 30. Default: 10.
Step 6	end Example: `Router(config-cm-fallback)# end`	Exits configuration mode and enters privileged EXEC mode.

Troubleshooting

To troubleshoot your Cisco Unified SRST configuration, use the following commands:

To set keepalive debugging for Cisco IP phones, use the debug ephone keepalive command.
To set registration debugging for Cisco IP phones, use the debug ephone register command.
To set state debugging for Cisco IP phones, use the debug ephone state command.
To set detail debugging for Cisco IP phones, use the debug ephone detail command.
To set error debugging for Cisco IP phones, use the debug ephone error command.
To set call statistics debugging for Cisco IP phones, use the debug ephone statistics command.
To provide voice-packet-level debugging and to display the contents of one voice packet in every 1024 voice packets, use the debug ephone pak command.
To provide raw low-level protocol debugging display for all SCCP messages, use the debug ephone raw command.

For further debugging, see Cisco IOS Debug Command Reference.

	Command or Action	Purpose
Step 1	Use the show running-config command to display ephone-dn and ephone information associated with this phone.
Step 2	After Cisco IP Communicator registers with Cisco Unified SRST, it displays the phone extensions and soft keys in its configuration. Verify that these are correct.
Step 3	Make a local call from the phone and ask someone to call you. Verify that you have a two-way voice path.

Bias-Free Language

Results

Chapter: Setting Up Cisco Unified IP Phones using SCCP

Setting Up Cisco Unified IP Phones using SCCP

Information About Setting Up Cisco Unified IP Phones

How to Set Up Cisco Unified IP Phones

Configuring Cisco Unified SRST to Support Phone Functions

SUMMARY STEPS

DETAILED STEPS

Example:

Example:

Example:

Example:

Example:

Example:

Configuring Cisco Unified 8941 and 8945 SCCP IP Phones

SUMMARY STEPS

DETAILED STEPS

Example:

Example:

Example:

Example:

Example:

Example:

Verifying That Cisco Unified SRST Is Enabled

Configuring IP Phone Clock, Date, and Time Formats

SUMMARY STEPS

DETAILED STEPS

Example:

Example:

Example:

Example:

Example:

Example

Configuring IP Phone Language Display

SUMMARY STEPS

DETAILED STEPS

Example:

Example:

Example:

Example:

Example

Configuring Customized System Messages for Cisco Unified IP Phones

SUMMARY STEPS

DETAILED STEPS

Example:

Example:

Example:

Example

Configuring a Secondary Dial Tone

SUMMARY STEPS

DETAILED STEPS

Example:

Example:

Example:

Example

Configuring Dual-Line Phones

SUMMARY STEPS

DETAILED STEPS

Example:

Example:

Example:

Example

Configuring Eight Calls per Button (Octo-Line)

Before you begin

SUMMARY STEPS

DETAILED STEPS

Example:

Example:

Example:

Example:

Example:

Example:

Example

Configuring the Maximum Number of Calls

Before you begin

SUMMARY STEPS

DETAILED STEPS

Example: