Monday, November 30, 2009

Failed to Install IPv6 on Windows XP

I have tried to install IPv6 on my Windows XP laptop using the command line “ipv6 install” and it failed with the error message “Failed to complete action, Error 0x800704b8”.  When I tried to do it via GUI and it showed an error dialog box “An extended error has occured”.  After some googling, I solve my problem with the following command:

esentutl /p %windir%\security\Database\secedit.sdb

Try to run the ipv6 install again and it works like a charm!

Thursday, November 19, 2009

I don’t have Cisco Unity Inbox after logon Unity PCA. I can only see Cisco Unity Assistant. Why?

My environment: Unity 7.0.2

First thing is you have to make sure you have license to access Cisco Unity Inbox.  Second thing is make sure you have turned it on under “Class Of Service” > “Features”.


MWI isn’t turned on! What’s wrong with the Unity SIP integration?

My environment: UC Manager, Unity 7.0.2

SIP integration doesn’t use MWI DN numbers to turn on and off MWI.  Unity will inform UCM to turn on and off MWI by sending a SIP NOTIFY to UCM. 

To make sure UCM accepts the SIP NOTIFY and update the phone MWI status, check your SIP trunk configuration.  Make sure the “Incoming Call CSS” under your SIP trunk configuration includes the partition of the DN!  After setting the “Incoming Call CSS”, go to the Unity admin page, under the subscriber settings, the message configuration, refresh the MWI status.  You will the the MWI of the phone lights up!

Single Number Reach is not working! Only local phone rings!

My environment: UC Manager

One of the common area that you will miss out is the “Remote Destination Profile” configuration.  Make sure the “Rerouting Calling Search Space” contains your partition that is used for outgoing call.  Check what is your partition used in the outgoing call route pattern and include it into the Rerouting CSS!

“You are not a valid mobile phone user”

My environment: UC Manager

This is a common error when you try to configure the mobility softkey or line key for Mobile connect.  All you need to do is to configure the “Owner User ID” under “Phone Configuration”. 

If you have extension mobility enabled on that phone, you will find the “Owner User ID” being grey out.  The current work around is to uncheck the extension mobility check box under “Phone configuration”, configure the “Owner User ID”, then recheck the Extension mobility checkbox!

Setting up a sFTP server on Windows for DRS

My environment: UC Manager

For security reason, DRS only allows to transfer backup files to sFTP server if you don’t want to backup to tape.  Here is a simple tutorial on how to setup a sFTP server on Windows.

1. Get the OpenSSH windows package here.  Install it.

2. Open a command prompt, go to the installation directory.  e.g. c:\program files\openssh

3. Create group file in command prompt

mkgroup –l >> ..\etc\group

4. Add user to passwd file.  The users need to be an existing Windows user.  Say for example the username is panda.

mkpasswd –l –u panda >> ..\etc\passwd

5. You can change the home folder in passwd file.  Otherwise your home folder will be the OpenSSH installation folder.

6. Start the OpenSSH service.

7. Very important reminder is, make sure you have write permission to your home folder, otherwise DRS can’t write to it!

Can’t create backup device in Disaster Recovery System

My environment: UC Manager

This error message has spent me an hour to troubleshoot, I think it can be phrased better.

Update failed : Unable to access SFTP server or SFTP server too slow to respond.  Please make sure the login credentials and path are correct.

If you are pretty sure that the sFTP server is setup correctly, and you can access the sFTP server via WinSCP.  Check the permission of the folder, make sure the sFTP server user can write to that folder.  It was the permission problem that spent me an hour to troubleshoot!

Prevent Toll Fraud in Ad Hoc Conference

My environment: UC Manager

By default, the ad hoc conference behavior is when the conference controller A calls B and C to create a 3-way conference, B and C’s call will continue when A hangs up.  You can change this behavior by changing the Service Parameters > Cisco CallManager > Drop Ad Hoc Conference in UC Manager.  When the conference controller leaves, or all the on-net participants left the conference, the conference will drop.

Never (the default option)

The conference remains active a) after the conference controller hangs, and b) after all OnNet parties hang up. Be aware that choosing this option means that if OnNet parties conference in OffNet parties and then disconnect, the conference stays active between the OffNet parties, which could result in potential toll fraud.

When Conference Controller Leaves

Terminate the conference when the conference controller hangs up or when the conference controller transfers, redirects, or parks the conference call and the retrieving party hangs up.

When No OnNet Parties Remain in the Conference

Terminate the conference when there are no OnNet parties remaining in the conference.

Disable Call Waiting on your phone

My environment: UC Manager

For some reason you might want to disable call waiting on your 7900 series IP phone.  One of the reason is you want to test out the Call Forward Busy easily by only making 2 calls to a phone.  Go to the DN settings and make the “Maximum number of calls” and “Busy Trigger”to “1”.  Your phone will now only accept 1 call!


Speed Dial BLF is not working? I can’t monitor the phone presence status!

My environment: UC Manager

First thing to check is to make sure you have enabled the “BLF for Call List” in Enterprise Parameters.  More details here.

Second thing is to make sure you have configure the “Subscribe CSS” under Phone Configuration.  The Subscribe CSS should include the partition of the DN that you are monitoring.


Monday, November 16, 2009

Enable Phone Presence on Call List

My environment: UC Manager

To enable phone presence status on Call List, change the “BLF for Call List” parameter at “Enterprise Parameters” from the default “Disable” to “Enable”.  Reset the phone to make the changes effective.


Thursday, November 12, 2009

Configuring Extension Mobility on UC Manager

My Environment: UC Manager

Extension mobility allows user temporarily access the phone extension numbers and configuration by logon other IP phones.  This is a quick tutorial to guide you through step-by-step:

1. Make sure Cisco Extension Mobility service is activated under Unified Serviceability

2. Create Extension Mobility Phone Service

“Device” > “Device Settings” > “Phone Services”

The service URL is:



3. Create a default device profile for each phone type that you want to support Cisco Extension Mobility

“Device” > “Device Settings” > “Default Device Profile”

4. Create the user device profile for a user

“Device” > “Device Settings” > “Device Profile”


5. Associate the end user to the device profile


6. Enable Extension Mobility on phone and subscribe IP phone service

“Device” > “Phone”



Medianet Autoprovisioning Demo

The switch recognize the device via CDP or by other customized ways to autoprovision the switchport configuration based on what kinds of device plugged in.  This auto smartport is available on 12.2(52)SE for most of the Cisco fixed configuration switches.

Going Shopping? Get onto the Borderless Network!

The future of shopping vision!

Single Button Barge

My Environment: UC Manager

The single button barge or cBarge allows a user to press the shared line button of the remotely active call (the phone that is in remote in use state), to be added to the call with all parties.

Barge – uses Built-in conference bridge of the phone that is being barged

cBarge – Using the shared conference bridge

Most of the settings are done under “System” > “Service Parameters”

1. Set the “Built-in Bridge Enable” parameter to “On”.  This step is only required if you want to configure Barge rather than cBarge.


2. Set the “Party Entrance Tone”to “True”


3.  To enable single button barge for all users, set the “single button barge / cBarge” to either barge or cBarge


4. The phone privacy is turned on by default.  You can turn it off globally or by individual phone or using the privacy programmable line key.


5. Try the single button barge now!

Using UC Manager Software Conference Bridge as conferencing resource

My environment: UC Manager

You can either use the DSP on ISR as conferencing resource, or using the software conference bridge comes with UC Manager.  This tutorial is a quick guide how to configure and use UC Manager Software conference bridge (CFB) for audio conference.

1.  Go to UC Manager Administration page. 

“Media Resources” > “Conference Bridge”.  Make sure your software conference bridge is registered to your UCM.  You don’t have to do anything, it should be enabled by default.


2. Create a Media Resource Group to include your CFB.

“Media Resources” > “Media Resource Group” > “Add New”


3. Put your Media Resource Group into a Media Resource Group List

“Media Resources” > “Media Resource Group List” > “Add New”


4. Assign the Media Resource Group List (MRGL) into the Device Pool or the phone

“System” > “Device Pool”


5. Reset the phone and try to make a 3-party conference call!