CUCM

DRS backup never releases lock – stops performing backups CSCsr87199 Description Symptom:– DRS Backups stop executing automatically. – When you attempt a manual backup, you get an error saying: “Backup operation currently in progress…. please wait and try after sometime” – When trying to install a new version or a COP file, you get the following error: “The system is currently locked by another process. Please try again later” Conditions: Occurs if DRF is scheduled…

  CUCM Database Replication is an area in which Cisco customers and partners have asked for more in-depth training in being able to properly assess a replication problem and potentially resolve an issue without involving TAC.  This document discusses the basics needed to effectively troubleshoot and resolve replication issues. Replication Architecture CUCM 5.x Replication Architecture Communications Manager 5.x has a similar replication topology to Callmanager 4.X. They both follow a hub and spoke topology. The…

Hi Guys, While working with CUCM 9.1.XXX i faced some rare issues when performing normal tasks , we start getting below errors  and while working with Cisco TAC  they informed it a BUG and they provided a customized image UCSInstall_UCOS_9.1.2.13055-1.sgn.iso  to fix it permanently:   Symptom: -Slow web access and dbreplcation issues -Database Communications Errors -Unmapped Exception java.sql Exception : Memory Allocation failed during query processing -Unmapped exception java.sqlException: Cannot initiate sort -Error occured while retriveing…

Often times, it’s necessary to access a CUCM server via the CLI instead of the web server. If you’ve not done much of this yet, the command structure may seem a little awkward. It’s nothing like IOS and can give many voice and network engineers pause when they first encounter it. This large post contains a list of all Cisco UC 9.1(1) CLI commands and their syntax in brief format.  This included CUCM CLI commands,…

  Blocking Inbound calls to Cisco Unified Communications Manager based on Caller ID Introduction: The ability to block calls based on the calling party number is a feature required by many customers to prevent unwanted calls, whether from telemarketer, malicious callers, or others, from reaching their end users. This application note will describe and illustrate how to set up call blocking using Cisco Unified Communications Manager v8.0 and later. Audience: This document is targeted at…

Number plan globalisation (based on the Australian Numbering Plan) – Part 2 The Chuck Norris Route Pattern Part II of my E.164 globalization on Cisco Unified Call Manager series. In this part, I will discuss and describe the nuts and bolts of making E.164 happen. In part one I have already discussed the why. Cisco has a really good chapter on this topic in their services and features guide:   http://www.cisco.com/en/US/docs/voice_ip_comm/cucm/admin/8_5_1/ccmfeat/fscallpn.htmlhttp://www.cisco.com/en/US/docs/voice_ip_comm/cucm/admin/8_5_1/ccmfeat/fscallpn.html INBOUND CALLING PARTY NORMALIZATION…

CUCM restrict caller ID ANI “How to restrict or block a caller ID (ANI) from being sent, in CUCM” Or how to restrict Caller ID presentation” Modification or restriction of ANI (Automatic number Identification, but I will use the term caller ID) is a very common requirement in Telephony deployments. There a heap of ways of modifying the caller ID and on CUCM deployments this is traditionally done through the external phone number mask on…

Secure signaling and Media exchange Part I Introduction This first part, of a two part post, I will describe the technology behind secure signalling and media exchange in a Cisco Unified Call Manager deployment. It will describe how secure signalling and media exchange between phones, Call Manager and an H323 gateway, works. In part II, I will describe the configuration steps required to pull all this off. A lot of UC engineers might never come…

Viewing Core dumps CUCM Core dumps, ah yes!  The boring stuff. Some times an  unavoidable part of a troubleshooting process. they can be particularly useful if you see certain services restart on your server for no apparent reason. This is a quick little post on how to obtain core dumps and how to capture their output and what to look for once you have the output. What are they? Core dumps occur when a Linux process…

Call recording configuration in CUCM Call recording.  This boils down to capturing RTP streams and somehow matching a certain RTP stream to an extension and or user ID, so it can be archived properly on a recording server. In order to do this, two things will need to be in place: Some form of RTP stream replication/forking, so that a conversation can take place as well as a recording of this same conversation at the…