Cisco Call Manager Express 8.5 (Unified Communications Manager Express) introduced support for the Cisco 9951 and 9971 phones but it was lacking support for the onboard camera and video calls. With CME 8.6 and newer, Cisco introduced support for the video camera on the 9951/9971 phones allowing for video calls as long as video and [...]
Archive for the ‘Cisco’ Category
Configuring Cisco 9951/9971 SIP Phones with Call Manager Express (CME)
Posted: 18th June 2012 by Mark in Cisco, SIP9
Install Cisco Unified Communications Manager 8 (CUCM 8.x) in VMWare
Posted: 1st August 2011 by Mark in CiscoThe following VMWare specifications should be used when installing Cisco Unified Communications Manager 8 (Callmanager) as a virtual machine. This has been tested on both VMWare Fusion 3 for Mac and VMWare Workstation 7 for Linux. Note that it is best to pre-allocate your hard drive space if possible in order to get the best [...]
The purpose of Surrogate Registration is to allow SIP endpoints that do not have the ability to perform SIP registration, or don’t gracefully manage their registrations very well, to appear as a registered endpoint on a SIP registrar platform such as Broadsoft BroadWorks. It is not always desirable to have a SIP endpoint function as [...]
Broadsoft and Cisco SIP 503 “Retry-After” SIP Header Support
Posted: 23rd March 2011 by Mark in BroadWorks, Cisco, SIPSIP 503 Service Unavailable is commonly seen in a VoIP network when a SIP device (such as a SIP server) is knowingly unable to process a call. Typically when this happens the endpoint that originated the Invite will try the next available host it receives in the SIP Contact header. In this particular example lets [...]
CUCM (Call Manager) SIP Trunk and the “Missing” CODEC in SIP INVITE Messages
Posted: 11th February 2011 by Mark in CiscoWhen configuring a CUCM for SIP Trunk there may not be an SDP listed in the initial SIP Invite as it egresses the network. If this is the case then the far end SIP endpoint receiving the call from CUCM will try and establish the codec type by including SDP in the 200 OK message [...]
Adjusting Cisco IOS SIP Invite Timers and Retry Values (sip-ua) for Failure Recovery
Posted: 9th February 2011 by Mark in CiscoCisco IOS contains a configurable object called SIP User Agent (sip-ua) where several different SIP settings may be altered from their default behavior. The focus here are the settings for SIP Retry Invite and SIP Timers and why it makes sense to change the default settings on the router if calls should reroute over another [...]
Recently my wife threw a surprise birthday party for me. She really got me good on this one! None of my friends hinted that it was coming. In light of recently earning my CCIE Voice certification she had the coolest cake I had ever seen…fully equipped with a phone and cord!
When completing a fresh installation of CUCM it will use its own embedded LDAP directory to store End User information. In most cases it is preferred to integrate CUCM with a corporate LDAP directory such as Micrsoft Active Directory rather than managing two separate user databases. This becomes even more apparent when there are multiple [...]
CUCM: X-Lite, eyeBeam, or Bria Configured as SIP Endpoints
Posted: 12th November 2010 by Mark in Cisco, SIPThere is no denying that CounterPath makes great SIP softphones and fortunately they work very well with CUCM. From the free X-Lite phone to its bigger brothers eyeBeam and Bria, there is hardly a reason not to be using a CounterPath product if you are considering a SIP endpoint that is compatible with CUCM. It [...]
Cisco Meeting Place 8 includes a demo license when installed in VMWare which supports 6 concurrent attendees. The host operating system I tested with is Red Hat Enterprise Linux 5 running VMWare Workstation 7.1. When creating a new virtual machine the guest OS should be Red Hat Enterprise Linux 4 (32-bit). Use the default [...]