For incoming calls to the SNR extension, Cisco Unified CME rings the desktop IP phone first. If the IP phone does not answer within the configured amount of time, it rings the configured remote number while continuing to ring the IP phone. Unanswered calls are sent to a configured voice-mail number.

Remote Destinations can be either of following:

• Mobile (cellular) phones.
• Smart phones.
• IP phones not belonging to the same Cisco Unified CME router as the desktop phone.
• Home phone numbers in the PSTN. Supported PSTN interfaces include PRI, BRI, SIP, and FXO.

The IP phone user has these options for handling calls made to the SNR extension:

•Pull back the call from the remote phone—Phone user can manually pull back the call to the SNR extension by pressing the Resume soft key, which disconnects the call from the remote phone.

•Send the call to remote phone—Phone user can send the call to the remote phone by using the Mobility soft key. While connected to the call, the phone user can press the Mobility soft key and select “Send call to mobile.” The call is forwarded to the remote phone.

•Enable or disable Single Number Reach—While the IP phone is in the idle state, the user can toggle the SNR feature on and off by using the Mobility soft key. If the user disables SNR, Cisco Unified CME does not ring the remote number.

Configuration:

ephone-template 1
softkeys idle Dnd Gpickup Pickup Mobility
softkeys connected Endcall Hold LiveRcd Mobility
!
ephone-dn 10
number 4001
mobility
snr 4085551212 delay 5 timeout 15 cfwd-noan 4003
!
ephone 10
ephone-template 1
button 1:10
!

The phone receiving a whisper page displays the extension and name of the party initiating the whisper page and CUCME plays a zipzip tone before the called party hears the caller’s voice thus establishing a one-way audio channel. If the called party wants to speak to the caller, the called party  has to select the intercom line button on their phone. Pressing intercom line button on called phone changes the call state to connected (two-way audio).The lamp for intercom buttons are colored amber to indicate one-way audio for whisper intercom and green to indicate two-way audio for standard intercom.

Only one intercom call, either inbound or outbound, is allowed on the phone at one time. No call features are supported for intercom calls. Intercom lines cannot be shared. A directory number can only be either a regular intercom or whisper intercom type.  Whisper intercom directory number must be configured for each phone that requires the Whisper Intercom feature.A whisper intercom directory number can place calls only to another whisper intercom directory number. Calls between a whisper intercom directory number and a standard directory number or intercom directory number are rejected with a busy tone.

Prerequisites:

•Cisco Unified CME 7.1 or a later version.

•IP phones require SCCP 12.0 or a later version.
Restrictions:

•Supported on SCCP phones only

•Not supported on single-line phone models such as the Cisco Unified IP Phone 7906 or 7911.

•Whisper intercom directory numbers can place calls only to other whisper intercom numbers.

•A directory number can be configured as either a regular intercom or a whisper intercom, not both.

•Dual-line and octo-line directory numbers are not supported as intercom lines.

•Only one intercom call, either incoming or outgoing, is allowed on the phone at one time.

•Call features are not supported on intercom calls.

Enabling Whisper Intercom Feature:

The following example shows that Whisper Intercom is enabled for extension 1002:

ephone-dn 5
number 4001
whisper-intercom speed-dial 4002 label “Manager”
!
ephone 5
button 1:1 2:5

ephone-dn 6
number 4002
whisper-intercom speed-dial 4001 label “Assistant”
!
ephone 6
button 1:2 2:6

Line 2 for both ephones is Whisper Intercom Line

Verification:

show ephone-dn whisper

!

In order to configure Extension Mobility on CUCME , here are the quick 4 mandatory steps involved:

• Step1: Configure Cisco Unified CME for EM Service :

cucme-hq(config)#ip http server
cucme-hq(config)#telephony-service
cucme-hq(config-telephony)#url authentication http://192.168.15.2/CCMCIP/authenticate.asp appname cisco
cucme-hq(config-telephony)#authentication credential appname cisco
cucme-hq(config-telephony)#em keep-history
cucme-hq(config-telephony)#em logout 19:00 24:00

Explanation :

Here,we turned on HTTP server on the Cisco Unified CME router that hosts the service URL for the Extension Mobility Login and Logout pages.We configured URL authentication which instructs IP phones to send HTTP requests to the authentication server.Also,we created an entry for an EM application’s credential(appname) with password(cisco) in the CUCME database to be used by Authentication Server.This feature is optional and is required to support requests requests from applications other than Extension Mobility, such as Cisco VoiceView Express.We Configured EM to  keep call histories even if users log out from Extension Mobility phones.Finally ,at 19:00 HRS and 24:00 HRS , logged in users will be automatically logged out from EM Service.

• Step2: Configure a Logout Profile for an IP Phone :

cucme-hq(config)#voice logout-profile 1
cucme-hq(config-logout-profile)#user 3001 password cisco
cucme-hq(config-logout-profile)#number 3001 type feature-ring
cucme-hq(config-logout-profile)#speed-dial 1 3002 blf
cucme-hq(config-logout-profile)#pin 9999

Explanation :

Here , We configured a Logout Profile  to define the default appearance for a Cisco Unified IP phone that is enabled for Extension Mobility , configured user credential , pin ,directory number with feature-ring type and enabled Busy Lamp Field (BLF) monitoring for a speed-dial number.

• Step3: Enable an IP Phone for Extension Mobility :

cucme-hq(config-logout-profile)#ephone 1
cucme-hq(config-ephone)#logout-profile 1

Explanation :

Simply assign an ephone (Cisco IP Phone / CIPC) with logout-profile we defined in step 2.

• Step4: Configure a User Profile:

cucme-hq(config-ephone)#voice user-profile 1
cucme-hq(config-user-profile)#pin 12345
cucme-hq(config-user-profile)#user em3101 pass cisco
cucme-hq(config-user-profile)#number 3101
cucme-hq(config-user-profile)#speed-dial 1 3102 blf
cucme-hq(config-user-profile)#max-idle-time 30

Explanation :

Configure User Profile for a phone user who logs into a Cisco Unified IP phone via EM.Here,we  defined user credential, directory number , Speed dial and an idle-duration timer for automatically logging out an Extension Mobility user.

First Copy CME GUI files to flash of your router. Then, at minimum , issue following commands:

CME IOS SETUP:

• ip http server
• ip http path flash:
• telephony-service
• web admin system name admin password cisco
• dn-webedit
• time-webedit

Now, point your browser to following URL (assuming 192.168.1.1 to be ip addres of CME router)

http://192.168.1.1/ccme.html

Done !